Compaq Presario CQ41 Maintenance And Service Manual Download Page 66

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4–30

Maintenance and Service Guide

Removal and replacement procedures

10. Flex the inside edges of the top edge

, the left and right sides

, and the bottom edge of the display bezel

until the bezel disengages from the display enclosure.

11. Remove the display bezel

. The display bezel without a webcam module is available using spare part number

487285-001. The display bezel with a webcam module is available using 487286-001.

12. To replace the display inverter, lift the inverter

from the clips in the display enclosure as far as the display

panel cable and the backlight cable will allow.

13. Disconnect the display panel cable

and the backlight cable

from the display inverter. The display inverter

is available using spare part number 486736-001.

Summary of Contents for Presario CQ41

Page 1: ...99 001 December 2009 This guide is a troubleshooting reference used for maintaining and servicing the computer It provides comprehensive information on identifying computer features components and spare parts troubleshooting computer problems and performing computer disassembly procedures ...

Page 2: ...d Windows are U S registered trademarks of Microsoft Corporation SD Logo is a trademark of its proprietor The information contained herein is subject to change without notice The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services Nothing herein should be construed as constituting an additional warranty HP shall not ...

Page 3: ...t allow another hard surface such as an adjoining optional printer or a soft surface such as pillows or rugs or clothing to block airflow Also do not allow the AC adapter to contact the skin or a soft surface such as pillows or rugs or clothing during operation The computer and the AC adapter comply with the user accessible surface temperature limits defined by the International Standard for Safet...

Page 4: ...ts 2 12 3 Illustrated parts catalog Service tag 3 1 Computer major components 3 2 Display assembly 3 7 Plastics Kit 3 8 Mass storage devices 3 9 Miscellaneous parts 3 10 Sequential part number listing 3 11 4 Removal and replacement procedures Preliminary replacement requirements 4 1 Tools required 4 1 Service considerations 4 1 Plastic parts 4 1 Grounding guidelines 4 2 Component replacement proce...

Page 5: ...ity menus 5 3 Main menu 5 3 Security menu 5 3 System Configuration menu 5 4 Diagnostics menu 5 4 6 Specifications Computer specifications 6 1 14 1 in display specifications 6 2 Hard drive specifications 6 3 Blu ray ROM DVD R RW SuperMulti DL Drive with LightScribe specifications 6 4 DVD RW SuperMulti DL Drive with LightScribe specifications 6 5 System DMA specifications 6 6 System interrupt specif...

Page 6: ...gnments Audio in microphone 8 1 Audio out headphone 8 1 External monitor 8 2 HDMI 8 3 RJ 11 modem select models only 8 4 RJ 45 network 8 5 Universal Serial Bus 8 6 9 Power cord set requirements Requirements for all countries and regions 9 1 Requirements for specific countries and regions 9 2 10Recycling Battery 10 1 Display 10 1 Index ...

Page 7: ...ideo memory Mobile Intel GMA Media Accelerator HD unified memory architecture UMA integrated with shared video memory Up to 285 MB of video memory on computer models equipped with 1 GB of main system memory Up to 797 MB of video memory on computer models equipped with 2 GB of main system memory Up to 1309 MB of video memory on computer models equipped with 3 GB of main system memory Up to 1295 MB ...

Page 8: ...7200 rpm 250 GB 7200 rpm 160 GB 7200 rpm Optical drive 12 7 mm tray load Serial ATA SATA Fixed removal of 1 screw required Customer accessible Parallel ATA Supports no optical drive option Supports the following drives DVD R RW SuperMulti DL Drive with LightScribe Blu ray ROM DVD R RW SuperMulti DL Drive with LightScribe Microphone Single analog microphone Audio High definition audio Supports Micr...

Page 9: ...11 modem select models only HDMI v 1 3b supporting 1080p with HDCP key HP Smart Adapter power RJ 45 network Ethernet includes link and activity lights USB 2 0 VGA Dsub 15 pin supports the following resolutions 1920 1200 external resolution at 60 GHz 1600 1200 external resolution at 75 GHz Hot plug unplug with auto detect Keyboard pointing devices 14 1 in keyboard TouchPad with twoTouchPad buttons ...

Page 10: ...Professional 64 bit or 32 bit OS Windows 7 Premium 64 bit or 32 bit OS Windows 7 Basic 32 bit OS FreeDOS Serviceability End user replaceable parts AC adapter Battery system Hard drive Memory modules MiniCard components Optical drive WLAN module Category Description Discrete graphics subsystem memory UMA graphics subsystem memory ...

Page 11: ...Item Component Description 1 TouchPad light White TouchPad is enabled Amber TouchPad is disabled 2 TouchPad Moves the pointer and selects or activates items on the screen 3 Left TouchPad button Functions like the left button on an external mouse 4 TouchPad on off button Enables disables the TouchPad 5 TouchPad scroll zone Scrolls up or down 6 Right TouchPad button Functions like the right button o...

Page 12: ...umeric keypad is enabled 5 Battery light On The battery is charging Flashing The battery reaches a low battery level or a critical battery level Off If the computer is connected to an external power source the light is off when all batteries in the computer are fully charged If the computer is not connected to an external power source the light is off until the battery reaches a low battery level ...

Page 13: ...n to exit Hibernation If the computer has stopped responding and Windows shutdown procedures are ineffective press and hold the Power button for at least five seconds to shut down the computer To learn more about power settings select Start Control Panel System and Security Power Options 3 Wireless button Turns the wireless feature on or off but does not create a wireless connection A wireless net...

Page 14: ... function key or the esc key 3 Windows logo key Displays the Windows Start menu 4 Embedded numeric keypad keys Used like the keys on an external numeric keypad 5 Windows applications key Displays a shortcut menu for items beneath the pointer 6 Navigation keys home pg up pg down Execute volume mute volume up or volume down when pressed at the same time as the fn key 7 Function keys Execute frequent...

Page 15: ...nent Description 1 Internal display switch Turns off the display if the display is closed while the computer is turned on 2 Internal microphone Records sound 3 Webcam light select models only On The webcam is in use 4 Webcam select models only Records video and captures still photographs ...

Page 16: ...nected to an external power source the light is off when all batteries in the computer are fully charged If the computer is not connected to an external power source the light is off until the battery reaches a low battery level 3 Drive light Flashing The hard drive or the optical drive is being accessed 4 Audio in microphone jack Connects an optional computer headset microphone stereo array micro...

Page 17: ...e 2 7 Rear component Component Description Vent Enables airflow to cool internal components The computer fan starts up automatically to cool internal components and prevent overheating It is normal for the internal fan to cycle on and off during routine operation ...

Page 18: ...s Item Component Description 1 Optical drive light Flashing The optical drive is being accessed 2 Optical drive Reads and writes to optical discs 3 USB ports 2 Connect optional USB devices 4 RJ 11 modem jack select models only Connects a modem cable 5 Power connector Connects an AC adapter ...

Page 19: ...nal monitor port Connects an external VGA monitor or projector 3 RJ 45 network jack Connects a network cable 4 HDMI port Connects an optional video or audio device such as a high definition television or any compatible digital or audio component 5 USB port Connects an optional USB device 6 Digital Media Slot light On Accessing a digital card 7 Digital Media Slot Supports the following optional dig...

Page 20: ...two memory module slots 3 Mini Card compartment Holds the real time clock RTC battery and on select models the WLAN device Ä To prevent an unresponsive system replace the wireless module only with a wireless module authorized for use in the computer by the governmental agency that regulates wireless devices in your country or region If you replace the module and then receive a warning message remo...

Page 21: ...s devices These antennas are not visible from the outside of the computer For optimal transmission keep the areas immediately around the antennas free from obstructions To see wireless regulatory notices see the section of Regulatory Safety and Environmental Notices that applies to your country or region These notices are located in Help and Support ...

Page 22: ...ware components Item Component Description 1 Power cord Connects an AC adapter to an AC outlet 2 AC adapter Converts AC power to DC power 3 Battery Powers the computer when the computer is not plugged into external power Batteries and power cords vary in appearance by country or region ...

Page 23: ...he computer 2 Serial number s n An alphanumeric identifier that is unique to each product 3 Part number Product number p n This number provides specific information about the product s hardware components The part number helps a service technician to determine which components and parts are needed 4 Model description An alphanumeric identifier used to locate documents drivers and support for the c...

Page 24: ...3 2 Maintenance and Service Guide Illustrated parts catalog Computer major components ...

Page 25: ...01 TouchPad button board includes cable 494965 001 5 Heat sink assembly with UMA graphics subsystems includes thermal material 591957 001 6 Speaker assembly includes speaker cable All countries and regions except India 486865 001 India 486865 D61 7 System board includes replacement thermal material Discrete graphics subsystems 590329 001 UMA graphics subsystems 590330 001 8 Fan for models with UMA...

Page 26: ...uay Uzbekistan Vanuatu Venezuela Vietnam Yemen Zaire Zambia and Zimbabwe 518437 002 Broadcom BCM4312 802 11b g for use in Afghanistan Albania Algeria Andorra Angola Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan the Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia Bosnia and Herzegovina Botswana Brazil the British Virgin Islands Brun...

Page 27: ...tvia Lebanon Lesotho Liberia Liechtenstein Lithuania Luxembourg Macedonia Madagascar Malawi Malaysia the Maldives Mali Malta the Marshall Islands Martinique Mauritania Mauritius Mexico Micronesia Monaco Mongolia Montenegro Morocco Mozambique Namibia Nauru Nepal the Nether Antilles the Netherlands New Zealand Nicaragua Niger Nigeria Norway Oman Palau Panama Papua New Guinea Paraguay the People s Re...

Page 28: ...et not illustrated 482158 001 19 Optical drive includes bezel and bracket DVD R RW SuperMulti DL Drive with LightScribe 482178 003 Blu ray ROM DVD R RW SuperMulti DL Drive with LightScribe 578406 001 20 Memory module PC3 1333 1066 MHz DDR3 1024 MB 590351 001 2048 MB 590352 001 21 Processor includes replacement thermal material Intel Arrandale CPU uPGA Socket Single Core i5 520M 2 4 GHz 3 MB L3 cac...

Page 29: ... module select models only 487287 001 4 14 1 in WXGA TFT BrightView display panel includes display panel cable 487279 001 5 Display inverter 486736 001 6 Microphone module and cable 517629 001 7 Wireless antenna transceivers and cable Discrete graphics subsystems 502979 001 UMA graphics subsystems 489066 001 8 Display enclosure 487284 001 Display cable 486735 001 Display Screw Kit 486730 001 Displ...

Page 30: ...Service Guide Illustrated parts catalog Plastics Kit Item Description Spare part number Plastics Kit 486862 001 1 Hard Drive cover includes two captive screws 2 Memory Module compartment cover 3 Mini Card compartment cover ...

Page 31: ...GB 7200 rpm 575569 001 320 GB 7200 rpm 575568 001 250 GB 7200 rpm 575567 001 160 GB 7200 rpm 580846 001 Hard Drive Hardware Kit contains screws and hard drive bracket 482158 001 2 Optical drive includes bezel and bracket DVD R RW SuperMulti DL Drive with LightScribe 482178 003 Blu ray ROM DVD R RW SuperMulti DL Drive with LightScribe 578406 001 not illustrated ...

Page 32: ... China 490371 AA1 South Korea 490371 AD1 Taiwan 490371 AB1 United Kingdom and Singapore 490371 031 the United States 490371 001 Screw Kit Phillips PM3 0 3 0 screws Phillips PM2 5 18 0 screws Phillips PM2 5 10 0 screws Phillips PM2 5 7 0 captive screws Phillips PM2 5 6 0 screws Phillips PM2 5 5 0 captive screws Phillips PM2 5 5 0 screws Phillips PM2 5 4 0 screws Phillips PM2 5 3 0 screws Phillips P...

Page 33: ...01 Plastics kit 486863 001 Rubber kit includes six rubber computer feet 486864 001 Power connector and cable 486865 001 Speaker assembly for use in all countries and regions except India 486865 D61 Speaker assembly for use in India 486868 001 Bluetooth module cable for UMA models 486904 001 Keyboard for use in the United States 486904 161 Keyboard for use in Latin America 486904 201 Keyboard for u...

Page 34: ...States 490371 011 Power cord for use in Australia 490371 031 Power cord for use in the United Kingdom and Singapore 490371 061 Power cord for use in Italy 490371 202 Power cord for use in Brazil 490371 AA1 Power cord for use in the People s Republic of China 490371 AB1 Power cord for use in Taiwan 490371 AD1 Power cord for use in South Korea 490371 D01 Power cord for use in Argentina 490371 D61 Po...

Page 35: ...the United Arab Emirates the United Kingdom Uruguay Uzbekistan Vanuatu Venezuela Vietnam Yemen Zaire Zambia and Zimbabwe 517629 001 Microphone module and cable 518436 002 Atheros AR9285 802 11b g n for use in Afghanistan Albania Algeria Andorra Angola Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan the Bahamas Bahrain Barbados Belgium Belize Benin Bermuda Bhutan Bosnia and...

Page 36: ...ugal the Republic of Moldova Romania Rwanda Samoa San Marino Sao Tome and Principe Saudi Arabia Senegal Serbia the Seychelles Sierra Leone Singapore Slovakia Slovenia the Solomon Islands Somalia South Africa South Korea Spain Sri Lanka St Kitts and Nevis St Lucia St Vincent and the Grenadines Suriname Swaziland Sweden Switzerland Syria Taiwan Tajikistan Tanzania Thailand Togo Tonga Trinidad and To...

Page 37: ...cessive force during disassembly and reassembly damages plastic parts Use care when handling the plastic parts Apply pressure only at the points designated in the maintenance instructions Cables and connectors ÄCAUTION When servicing the computer be sure that cables are placed in their proper locations during the reassembly process Improper cable placement damages the computer Cables must be handl...

Page 38: ...ailer or other suitable form of protective packaging and label the package FRAGILE Grounding guidelines Electrostatic discharge damage Electronic components are sensitive to electrostatic discharge ESD Circuitry design and structure determine the degree of sensitivity Networks built into many integrated circuits provide some protection but in many cases ESD contains enough power to alter device pa...

Page 39: ...ot possible use an ionizer to dissipate electric charges Workstation guidelines Follow these grounding workstation guidelines Cover the workstation with approved static shielding material Use a wrist strap connected to a properly grounded work surface and use properly grounded tools and equipment Use conductive field service tools such as cutters screwdrivers and vacuums When fixtures must directl...

Page 40: ...ps on both feet with a minimum of one megohm resistance between the operator and ground To be effective the conductive strips must be worn in contact with the skin The following grounding equipment is recommended to prevent electrostatic damage Antistatic tape Antistatic smocks aprons and sleeve protectors Conductive bins and other assembly or soldering aids Nonconductive foam Conductive tabletop ...

Page 41: ...e the computer serial number and model number provided on the service tag Item Component Description 1 Product name The name affixed to the front of the computer 2 Serial number s n An alphanumeric identifier that is unique to each product 3 Part number Product number p n This number provides specific information about the product s hardware components The part number helps a service technician to...

Page 42: ...eplacement procedures Computer feet The computer feet are adhesive backed rubber pads The feet are included in the Rubber Kit spare part number 486863 001 There are six rubber feet that attach to the base enclosure in the locations illustrated below ...

Page 43: ...the power cord from the AC outlet and then disconnecting the AC adapter from the computer Remove the battery 1 Turn the computer upside down on a flat surface with the battery bay toward you 2 Slide the battery release latch 1 to release the battery 3 Pivot the battery 2 upward and lift it out of the computer 3 To insert the battery insert the rear edge of the battery into the battery bay and pivo...

Page 44: ...computer 4 Remove the battery see Battery on page 4 7 Remove the hard drive 1 Position the computer with the front toward you 2 Remove the two Phillips PM2 5 5 0 captive screws 1 that secure the hard drive cover to the computer 3 Lift the left side 2 of the hard drive cover swing it to the right and remove the cover 3 The hard drive cover is included in the Plastics Kit spare part number 486862 00...

Page 45: ...tab 2 on the hard drive to slide the hard drive 3 to the left 6 Remove the hard drive 4 from the hard drive bay 7 If it is necessary to replace the hard drive bracket a Remove the two Phillips PM3 0 3 0 screws 1 from each side of the hard drive b Lift the bracket 2 straight up to remove it from the hard drive Reverse this procedure to reassemble and install the hard drive ...

Page 46: ...er 4 Remove the battery see Battery on page 4 7 5 Remove the hard drive cover see Hard drive on page 4 8 Remove the memory module The top memory module slot is for expansion memory and the bottom slot is for primary memory 1 Position the computer with the front toward you 2 Remove the Phillips PM2 5 7 0 captive screw 1 that secures the memory module compartment cover to the computer 3 Lift the rig...

Page 47: ...e to release the memory module The edge of the module opposite the slot rises away from the computer 5 Remove the memory module 2 by pulling the module away from the slot at an angle Memory modules are designed with a notch 3 to prevent incorrect insertion into the memory module slot Reverse this procedure to install a memory module ...

Page 48: ...y first disconnecting the power cord from the AC outlet and then disconnecting the AC adapter from the computer 4 Remove the battery see Battery on page 4 7 Remove the RTC battery 1 Remove the two Phillips PM2 5 5 0 captive screws 1 that secure the Mini Card compartment cover to the computer 2 Lift the right side of the Mini Card compartment cover 2 swing it to the left and remove the cover 3 The ...

Page 49: ...res Maintenance and Service Guide 4 13 3 Disconnect the RTC battery cable 1 from the system board 4 Release the two sided tape 2 that holds the RTC battery 5 Remove the RTC battery 3 Reverse this procedure to install the RTC battery ...

Page 50: ...United Arab Emirates the United Kingdom Uruguay Uzbekistan Vanuatu Venezuela Vietnam Yemen Zaire Zambia and Zimbabwe 518437 002 Broadcom BCM4312 802 11b g for use in Afghanistan Albania Algeria Andorra Angola Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan the Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia Bosnia and Herzegovina Bot...

Page 51: ...Kenya Kiribati Kuwait Kyrgyzstan Laos Latvia Lebanon Lesotho Liberia Liechtenstein Lithuania Luxembourg Macedonia Madagascar Malawi Malaysia the Maldives Mali Malta the Marshall Islands Martinique Mauritania Mauritius Mexico Micronesia Monaco Mongolia Montenegro Morocco Mozambique Namibia Nauru Nepal the Nether Antilles the Netherlands New Zealand Nicaragua Niger Nigeria Norway Oman Palau Panama P...

Page 52: ...vernmental agency that regulates wireless devices in your country or region If you replace the module and then receive a warning message remove the module to restore computer functionality and then contact technical support through Help and Support 1 Remove the RTC battery see RTC battery on page 4 12 2 Position the computer with the front toward you 3 Disconnect the WLAN antenna cables 1 from the...

Page 53: ...d Service Guide 4 17 6 If it is necessary to replace the Mini Card bracket remove the two Phillips PM2 5 4 0 screws 1 that secure it to the base enclosure 7 Lift the bracket 2 straight up to remove it Reverse this procedure to install the WLAN module ...

Page 54: ...h Help and Support 1 Remove the hard drive cover see Hard drive on page 4 8 2 Position the computer with the front toward you 3 Disconnect the WLAN antenna cables 1 from the terminals on the WLAN module The black WLAN antenna cable is connected to the WLAN module Main terminal The white WLAN antenna cable is connected to the WLAN module Aux terminal 4 Remove the two Phillips PM2 0 4 0 screws 2 tha...

Page 55: ...tenance and Service Guide 4 19 6 To replace the Mini Card bracket remove the two Phillips PM2 5 4 0 screws 1 that secure it to the base enclosure 7 Lift the bracket 2 straight up to remove it Reverse this procedure to install the WLAN module ...

Page 56: ...isconnecting the AC adapter from the computer 4 Remove the battery see Battery on page 4 7 Remove the optical drive 1 Position the computer with the right side toward you 2 Remove the Phillips PM2 5 5 0 screw 1 that secures the optical drive to the computer 3 Insert a thin tool such as a paper clip 2 into the release access and press to release the drive The optical drive disc tray is partially ej...

Page 57: ...ng the power cord from the AC outlet and then disconnecting the AC adapter from the computer 4 Remove the battery see Battery on page 4 7 5 Remove the hard drive cover see Hard drive on page 4 8 6 Remove the Mini Card compartment cover see RTC battery on page 4 12 7 Remove the optical drive see Optical drive on page 4 20 Remove the keyboard 1 Remove the three Phillips PM2 5 17 0 screws that secure...

Page 58: ... keyboard until it rests at an angle The keyboard is held by two sided tape 5 Slide the keyboard 2 back until the tabs on the bottom of the keyboard are clear of the keyboard cover 6 Release the zero insertion force ZIF connector 1 to which the keyboard cable is attached and thendisconnect the keyboard cable 2 from the system board 7 Remove the keyboard Reverse this procedure to install the keyboa...

Page 59: ...ove the battery see Battery on page 4 7 5 Remove the following components a Hard drive cover see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Optical drive see Optical drive on page 4 20 d Keyboard see Keyboard on page 4 21 Remove the keyboard cover 1 Remove the Phillips PM2 0 3 0 broadhead screw 1 from the optical drive bay the Phillips PM2 5 5 0 screw 2 fro...

Page 60: ...ter as far as possible 5 Remove the Phillips PM2 5 6 0 screw 1 from the front left corner of the keyboard cover 6 Release the ZIF connector to which the power button board cable 2 is connected and disconnect the cable from the system board 7 Lift and remove the keyboard cover 3 from the computer Reverse this procedure to install the keyboard cover ...

Page 61: ...hen disconnecting the AC adapter from the computer 4 Remove the battery see Battery on page 4 7 5 Remove the following components a Hard drive cover see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Optical drive cover see Optical drive on page 4 20 d Keyboard see Keyboard on page 4 21 e Keyboard cover see Keyboard cover on page 4 23 Remove the speaker assembl...

Page 62: ...d replacement procedures 3 Remove the two Phillips PM2 5 3 0 screws 1 that secure the speaker assembly to the computer 4 Lift the speaker assembly 2 straight up to remove it from the computer Reverse this procedure to install the speaker assembly ...

Page 63: ...et and then disconnecting the AC adapter from the computer 4 Remove the battery see Battery on page 4 7 5 Disconnect the wireless antenna cables from the WLAN module see WLAN module on page 4 14 6 Remove the following components a Hard drive cover see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Optical drive see Optical drive on page 4 20 d Keyboard see Keyb...

Page 64: ... antenna cable routes to the hard drive bay For models with discrete graphics subsystems the antenna cable routes to the Mini Card compartment 4 Disconnect the display panel cable 2 from the system board 5 Remove the microphone cable 1 from the hole in the system board and the routing channels and clips built into the top cover 6 Disconnect the microphone cable from the system board 2 ÄCAUTION Sup...

Page 65: ...assembly to the computer 8 Remove the display assembly 2 9 To replace the display bezel or any of the display assembly internal components remove the Mylar screw covers 1 and the two Phillips PM2 5 5 0 screws 2 on the display bezel lower edge The display rubber screw covers are included in the Display Rubber Kit spare part number 487283 001 ...

Page 66: ...play bezel without a webcam module is available using spare part number 487285 001 The display bezel with a webcam module is available using 487286 001 12 To replace the display inverter lift the inverter 1 from the clips in the display enclosure as far as the display panel cable and the backlight cable will allow 13 Disconnect the display panel cable 2 and the backlight cable 3 from the display i...

Page 67: ... enclosure 15 Remove the display panel 2 The display panel is available using the spare part number 487279 001 16 To replace the display cable a Peel back the plastic 1 that covers the cable b Remove the tape 2 that secures the cable to the display c Unplug the cable 3 from the display d Remove the cable from the display 4 The display cable is available using spare part number 486735 001 ...

Page 68: ...5 3 0 screw 1 that secures each transceiver to the display enclosure 20 Detach the wireless antenna transceivers 2 from the display enclosure The transceivers are secured by a foil wrapping 21 Release the wireless antenna transceivers and cables from the clips 3 built into the display enclosure 22 Remove the wireless antenna transceivers and cables 4 from the display enclosure The wireless antenna...

Page 69: ...WLAN module see WLAN module on page 4 14 6 Remove the following components a Hard drive cover see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Optical drive see Optical drive on page 4 20 d Keyboard see Keyboard on page 4 21 e Keyboard cover see Keyboard cover on page 4 23 f Speaker assembly see Speaker assembly on page 4 25 g Display assembly see Display ass...

Page 70: ... see WLAN module on page 4 14 6 Remove the following components a Hard drive cover see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Optical drive see Optical drive on page 4 20 d Keyboard see Keyboard on page 4 21 e Keyboard cover see Keyboard cover on page 4 23 f Speaker assembly see Speaker assembly on page 4 25 g Display assembly see Display assembly on pa...

Page 71: ... AC adapter from the computer 4 Remove the battery see Battery on page 4 7 5 Remove the following components a Hard drive see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Mini Card bracket see WLAN module on page 4 14 d Optical drive see Optical drive on page 4 20 e Keyboard see Keyboard on page 4 21 f Switch cover see Keyboard cover on page 4 23 g Speaker as...

Page 72: ...0 0 screws 2 Two Phillips PM2 5 5 0 screws 3 Two Phillips PM2 0 3 0 screws 3 Turn the computer right side up with the front toward you 4 Disconnect the following cables from the system board 1 TouchPad cable with zero insertion force ZIF connector 2 USB cable 5 Remove the two Phillips PM2 5 6 0 screws 1 that secure the top cover to the base enclosure 6 Lift up the front edge of the top cover until...

Page 73: ...Removal and replacement procedures Maintenance and Service Guide 4 37 Reverse this procedure to install the top cover ...

Page 74: ...he AC adapter from the computer 4 Remove the battery see Battery on page 4 7 5 Remove the following components a Hard drive see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Mini Card bracket see WLAN module on page 4 14 d Optical drive see Optical drive on page 4 20 e Keyboard see Keyboard on page 4 21 f Keyboard cover see Keyboard cover on page 4 23 g Speake...

Page 75: ...p cover upside down with the front toward you 2 Lift the Bluetooth module 1 away from computer 3 Disconnect the Bluetooth module cable 2 from the system board and Bluetooth module 4 Release the tape 3 that secures cable 5 Remove Bluetooth module and cable 4 Reverse this procedure to install the Bluetooth module and cable ...

Page 76: ...dapter from the computer 4 Remove the battery see Battery on page 4 7 5 Remove the following components 6 a Hard drive see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Mini Card bracket see WLAN module on page 4 14 d Optical drive see Optical drive on page 4 20 e Keyboard see Keyboard on page 4 21 f Keyboard cover see Keyboard cover on page 4 23 g Speaker ass...

Page 77: ... 4 0 screws 1 that secure the modem module to the system board 3 Disconnect the modem module cable 2 from the modem module 4 Lift up on the front of the modem module 3 to disconnect it from the system board Reverse this procedure to install the modem module When replacing the modem module be sure that the connector on the bottom of the modem module connects firmly to the system board ...

Page 78: ...then disconnecting the AC adapter from the computer 4 Remove the battery see Battery on page 4 7 5 Remove the following components a Hard drive see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Mini Card bracket see WLAN module on page 4 14 d Optical drive see Optical drive on page 4 20 e Keyboard see Keyboard on page 4 21 f Keyboard cover see Keyboard cover o...

Page 79: ...ve the cable from between the components that secure it in the base 2 3 Remove the two Phillips PM2 5 3 0 screws 3 that secures the audio board to the system board 4 Lift the rear edge of the audio board 4 so that the audio connectors slide out of the openings in the base enclosure and remove the audio board and cable Reverse this procedure to install the audio board ...

Page 80: ...then disconnecting the AC adapter from the computer 4 Remove the battery see Battery on page 4 7 5 Remove the following components a Hard drive see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Mini Card bracket see WLAN module on page 4 14 d Optical drive see Optical drive on page 4 20 e Keyboard see Keyboard on page 4 21 f Keyboard cover see Keyboard cover o...

Page 81: ...p with the right side toward you 2 Disconnect the USB board cable 1 from the system board 3 Remove the cable 2 from the base enclosure clips 4 Remove the Phillips PM2 5 3 0 screw 3 that secures the USB board to the computer 5 Lift the USB board 4 straight up to remove it from the computer Reverse this procedure to install the USB board ...

Page 82: ...rom the AC outlet and then disconnecting the AC adapter from the computer 4 Remove the battery see Battery on page 4 7 5 Remove the following components a Hard drive see Hard drive on page 4 8 b Mini Card compartment cover see RTC battery on page 4 12 c Mini Card bracket see WLAN module on page 4 14 d Optical drive see Optical drive on page 4 20 e Keyboard see Keyboard on page 4 21 f Keyboard cove...

Page 83: ...ght side up 2 Position the computer with the right side toward you 3 Disconnect the power connector cable 1 from the bottom of the system board 4 Remove the power connector 2 from the clip built into the base enclosure The power connector is secured by two sided tape Reverse this procedure to install the power connector and cable ...

Page 84: ... outlet and then disconnecting the AC adapter from the computer 4 Remove the battery see Battery on page 4 7 5 Remove the following components a Hard drive see Hard drive on page 4 8 b Memory module see Memory module on page 4 10 c RTC battery see RTC battery on page 4 12 d WLAN module see WLAN module on page 4 14 e Optical drive see Optical drive on page 4 20 f Keyboard see Keyboard on page 4 21 ...

Page 85: ...d and installed on the replacement system board Fan heat sink assembly see Heat sink fan assembly or heat sink on page 4 52 Processor see Processor on page 4 57 Remove the system board 1 Turn the computer display side up 2 Position the computer with the right side toward you 3 Disconnect the following cables from the system board 1 Modem cable 2 Audio board cable 3 USB board cable 4 Fan cable ...

Page 86: ...4 50 Maintenance and Service Guide Removal and replacement procedures 4 Disconnect the power connector cable 5 Remove the two Phillips PM2 5 5 0 screws that secure the system board to the base enclosure ...

Page 87: ...ntil the connectors on the left side of the system board disengage from the base enclosure 8 To replace the RJ 11 connector and cable remove the RJ 11 connector 1 from the clip built into the base enclosure 9 Remove the cable 2 from the routing channel built into the base enclosure The RJ II connector and cable are available using spare part number 494981 001 Reverse this procedure to install the ...

Page 88: ...Hibernation turn the computer on and then shut it down through the operating system 2 Disconnect all external devices connected to the computer 3 Disconnect the power from the computer by first disconnecting the power cord from the AC outlet and then disconnecting the AC adapter from the computer 4 Remove the battery see Battery on page 4 7 5 Remove the following components a Hard drive see Hard d...

Page 89: ...x apply to computer models equipped with graphics subsystems with UMA memory 2 Disconnect the fan cable 1 3 Loosen the four captive Phillips PM2 0 10 0 screws 2 that secure the fan heat sink assembly to the system board 4 Remove the fan heat sink assembly 3 Due to the adhesive quality of the thermal material located between the fan heat sink assembly and system board components it might be necessa...

Page 90: ...aterial is included with all system board fan heat sink assembly and processor spare parts Steps two through four apply to computer models equipped with graphics subsystems with discrete memory Steps five and six apply to computer models equipped with graphics subsystems with UMA memory 5 Loosen the four captive Phillips PM2 0 10 0 screws 1 that secure the heat sink assembly to the system board 6 ...

Page 91: ... each time the heat sink assembly is removed Thermal material is applied to the heat sink to correspond with components on the system board as follows the processor 1 the Northbridge chip 2 and the capacitors 3 Replacement thermal material is included with all system board fan heat sink assembly and processor spare parts Reverse this procedure to install the fan heat sink assembly ...

Page 92: ...nents a Hard drive see Hard drive on page 4 8 b Memory module see Memory module on page 4 10 c RTC battery see RTC battery on page 4 12 d WLAN module see WLAN module on page 4 14 e Optical drive see Optical drive on page 4 20 f Keyboard see Keyboard on page 4 21 g Keyboard cover see Keyboard cover on page 4 23 h Speaker assembly see Speaker assembly on page 4 25 i Display assembly see Display asse...

Page 93: ...components a Hard drive see Hard drive on page 4 8 b Memory module see Memory module on page 4 10 c RTC battery see RTC battery on page 4 12 d WLAN module see WLAN module on page 4 14 e Optical drive see Optical drive on page 4 20 f Keyboard see Keyboard on page 4 21 g Keyboard cover see Keyboard cover on page 4 23 h Speaker assembly see Speaker assembly on page 4 25 i Display assembly see Display...

Page 94: ...river to turn the processor locking screw 1 one half turn counterclockwise until you hear a click 2 Lift the processor 2 straight up to remove it When installing the processor align the gold triangle 3 on the processor with the triangle 4 embossed on the processor socket Reverse this procedure to install the processor ...

Page 95: ...Utility The following procedure explains how to change the language of Setup Utility If Setup Utility is not already running begin at step 1 If Setup Utility is already running begin at step 2 1 Open Setup Utility by turning on or restarting the computer When the Press the ESC key for Startup Menu message appears in the lower left corner of the screen press the f10 key or Open Setup Utility by tur...

Page 96: ...ssage appears in the lower left corner of the screen press the esc key When the Startup Menu is displayed press the f10 key 2 Select the Main menu 3 To exit Setup Utility without changing any settings use the arrow keys to select Exit Exit Discarding Changes and then press the enter key Restoring default settings in Setup Utility The following procedure explains how to restore Setup Utility defaul...

Page 97: ...e arrow keys to select Exit Exit Discarding Changes and then press the enter key After either choice the computer restarts in Windows Setup Utility menus The menu tables in this section provide an overview of Setup Utility options Some of Setup Utility menu items listed in this chapter might not be supported by the computer Main menu Security menu Select To do this System information View and chan...

Page 98: ...en enabled the computer fan will always be on Boot Options Set the following boot options f10 and f12 Delay seconds Set the delay for the f10 and f12 functions of Setup Utility in intervals of 5 seconds each 0 5 10 15 20 CD ROM boot Enable disable boot from CD ROM Floppy boot Enable disable boot from diskette Internal Network Adapter boot Enable disable boot from Internal Network Adapter Boot Orde...

Page 99: ... 74 A Temperature Operating not writing to optical disc 0 C to 35 C 32 F to 95 F Operating writing to optical disc 5 C to 35 C 41 F to 95 F Nonoperating 20 C to 60 C 4 F to 140 F Relative humidity Operating 10 to 90 Nonoperating 5 to 95 Maximum altitude unpressurized Operating 15 m to 3 048 m 50 ft to 10 000 ft Nonoperating 15 m to 12 192 m 50 ft to 40 000 ft Applicable product safety standards sp...

Page 100: ... 7 47 in Diagonal 35 82 cm 14 10 in Number of colors More than 262 144 Contrast ratio More than 300 1 Brightness 200 nits typical Pixel resolution Pitch 0 2373 0 2373 mm Format 1280 800 Configuration RGB vertical stripe Backlight Edge lit Character display 80 25 Total power consumption 5 2 W Viewing angle 40 horizontal 15 35 vertical typical ...

Page 101: ...ypical read including setting Single track 7200 rpm 1 5 ms 1 5 ms 1 5 ms 1 5 ms Average 7200 rpm 11 0 ms 11 0 ms 11 0 ms 11 0 ms Maximum 7200 rpm 22 0 ms 22 0 ms 22 0 ms 22 0 ms Logical blocks 976 773 168 625 142 448 488 397 168 312 581 808 Disc rotational speed 7200 rpm 7200 rpm 7200 rpm 7200 rpm Operating temperature 0 C to 60 C 32 F to 140 F 1 GB 1 billion bytes when referring to hard drive sto...

Page 102: ...OM BD R BD RE CD R CD RW DVD R DVD R 9 DVD RW DVD R DVD R 9 DVD RW DVD RAM LightScribe Interface SATA Access time CD DVD BD Random 190 ms 190 ms 230 ms Max data transfer rate 24X CD ROM 3 600 KB sec 8X DVD ROM 10 800 KB sec 4X BD ROM 18 000 KB sec 16X CD R 1 200 KB sec 10X CD RW 1 500 KB sec 8X DVD R 10 800 KB sec 8X DVD RW 10 800 KB sec 8X DVD R 10 800 KB sec 6X DVD RW 8 100 KB sec 4X DVD R Dual ...

Page 103: ...DVD R DVD RW DVD R DVD RW DVD RAM CD R CD RW DVD R DVD RW DVD R DVD RW DVD RAM LightScribe Interface SATA Access time CD DVD Random 150 ms 160 ms Max data transfer rate 24X CD ROM 3 600 KB sec 8X DVD ROM 10 800 KB sec 24X CD R 3 600 KB sec 16X CD RW 2 400 KB sec 8X DVD R 10 800 KB sec 8x DVD RW 10 800 KB sec 8X DVD R 10 800 KB sec 6X DVD RW 8 100 KB sec 4X DVD R Dual Layer 5 400 KB sec 4X DVD R Du...

Page 104: ...nHCD USB Host Controller IRQ16 Standard Opened USB Host Controller IRQ17 PCI standard PCI to PCI bridge IRQ17 Standard Enhanced PCI to USB Host Controller IRQ18 Broadcom 802 11g Network Adapter IRQ18 PCI standard PCI to PCI bridge IRQ18 PCI standard PCI to PCI bridge IRQ18 Standard OpenHCD USB Host Controller IRQ18 Standard OpenHCD USB Host Controller IRQ19 High Definition Audio Controller IRQ19 P...

Page 105: ...roller IRQ16 Standard OpenHCD USB Host Controller IRQ17 PCI standard PCI to PCI bridge IRQ17 Standard Enhanced PCI to USB Host Controller IRQ18 Atheros AR5009 802 11a g n WiFi Adapter IRQ18 PCI standard PCI to PCI bridge IRQ18 Standard OpenHCD USB Host Controller IRQ18 Standard OpenHCD USB Host Controller IRQ19 High Definition Audio Controller IRQ19 PCI standard PCI to PCI bridge IRQ19 Realtek PCI...

Page 106: ... Standard PS 2 Keyboard 070 071 System CMOS real time clock 072 073 Motherboard resources 080 080 Motherboard resources 081 08F Direct memory access controller 092 092 Motherboard resources 0A0 0A1 Programmable interrupt controller 0B0 0B1 Motherboard resources 0C0 0DF Direct memory access controller 0F0 0FE Numeric data processor 3B0 3BB ATI Mobility Radeon HD 4330 Series 3B0 3BB PCI standard PCI...

Page 107: ...CI E Fast Ethernet NIC NDIS 6 20 2000 2FFF PCI standard PCI to PCI bridge 3000 30FF ATI Mobility Radeon HD 4330 Series 3000 3FFF PCI standard PCI to PCI bridge 4010 401F Standard AHCI 1 0 Serial ATA Controller 4030 4037 Standard AHCI 1 0 Serial ATA Controller 4038 403F Standard AHCI 1 0 Serial ATA Controller 4048 404B Standard AHCI 1 0 Serial ATA Controller 404C 404F Standard AHCI 1 0 Serial ATA C...

Page 108: ...t Natural PS 2 Keyboard with HP 06C 06C Standard 101 102 key keyboard or Microsoft Natural PS 2 Keyboard with HP 070 071 System CMOS real time clock 072 073 Motherboard resources 080 080 Motherboard resources 081 08F Direct memory access controller 092 092 Motherboard resources 0A0 0A1 Programmable interrupt controller 0B0 0B1 Motherboard resources 0C0 0DF Direct memory access controller 0F0 0FE N...

Page 109: ...I standard PCI to PCI bridge 3000 3FFF PCI standard PCI to PCI bridge 4010 401F Standard AHCI 1 0 Serial ATA Controller 4030 4037 Standard AHCI 1 0 Serial ATA Controller 4038 403F Standard AHCI 1 0 Serial ATA Controller 4048 404B Standard AHCI 1 0 Serial ATA Controller 404C 404F Standard AHCI 1 0 Serial ATA Controller ...

Page 110: ... Creating system restore points operating system feature System restore points allow you to reverse undesirable changes to the computer by restoring the computer to an earlier state Recovering a program or driver Recovery Manager software feature This feature helps you reinstall a program or driver without performing a full system recovery Performing a full system recovery Recovery Manager softwar...

Page 111: ...very discs Use high quality DVD R DVD R BD R writable Blu ray or CD R discs All these discs are purchased separately DVDs and BDs have a much higher capacity than CDs If using CDs up to 20 discs might be required whereas only a few DVDs or BDs are required Read write discs such as CD RW DVD RW double layer DVD RW and BD RE rewritable Blu ray discs are not compatible with the Recovery Manager softw...

Page 112: ...indow toolbar or menu bar by taking a screen shot of your settings The screen shot is a time saver if you have to reset your preferences To copy the screen and paste it into a word processing document 1 Display the screen 2 Copy the screen To copy only the active window press alt fn prt sc To copy the entire screen press fn prt sc 3 Open a word processing document and then select Edit Paste 4 Save...

Page 113: ...re running utilities or changing Windows settings See Help and Support Using system restore points When backing up your system you are creating a system restore point A system restore point allows you to save and name a snapshot of your hard drive at a specific point in time You can then recover back to that point if you want to reverse subsequent changes made to your system Recovering to an earli...

Page 114: ...reviously backed up HP recommends using HP Recovery Manager to create a set of recovery discs entire drive backup as soon as you set up the computer Recovery Manager software allows you to repair or restore the system if you experience system failure or instability Recovery Manager works from recovery discs or from a dedicated recovery partition select models only on the hard drive However if the ...

Page 115: ...t do not have a partition Use these discs to recover your operating system and software On some models a recovery can be performed from the partition on the hard drive accessed by pressing either the Start button or the f11 key This restores the computer to its factory condition To restore the system from the partition 1 Access Recovery Manager by either Selecting Start All Programs Recovery Manag...

Page 116: ...nd Service Guide 8 1 8 Connector pin assignments Audio in microphone Audio out headphone Pin Signal 1 Audio signal in 2 Audio signal in 3 Ground Pin Signal 1 Audio out left channel 2 Audio out right channel 3 Ground ...

Page 117: ...gnments External monitor Pin Signal 1 Red analog 2 Green analog 3 Blue analog 4 Not connected 5 Ground 6 Ground analog 7 Ground analog 8 Ground analog 9 5 VDC 10 Ground 11 Monitor detect 12 DDC 2B data 13 Horizontal sync 14 Vertical sync 15 DDC 2B clock ...

Page 118: ... TDMS data 2 shield 3 TDMS data 2 4 TDMS data 1 5 TDMS data 1 shield 6 TDMS data 1 shield 7 TDMS data 0 8 TDMS data 0 shield 9 TDMS data 0 10 TDMS clock 11 TDMS data clock shield 12 TDMS data clock 13 Consumer electronics control 14 Not connected 15 Display data channel DDC clock 16 DDC data 17 Ground 18 5V Power 19 Hot plug detect ...

Page 119: ...8 4 Maintenance and Service Guide Connector pin assignments RJ 11 modem select models only Pin Signal 1 Unused 2 Tip 3 Ring 4 Unused 5 Unused 6 Unused ...

Page 120: ...Connector pin assignments Maintenance and Service Guide 8 5 RJ 45 network Pin Signal 1 Transmit 2 Transmit 3 Receive 4 Unused 5 Unused 6 Receive 7 Unused 8 Unused ...

Page 121: ...8 6 Maintenance and Service Guide Connector pin assignments Universal Serial Bus Pin Signal 1 5 VDC 2 Data 3 Data 4 Ground ...

Page 122: ...all countries and regions The requirements listed below are applicable to all countries and regions The length of the power cord set must be at least 1 5 m 5 0 ft and no more than 2 0 m 6 5 ft All power cord sets must be approved by an acceptable accredited agency responsible for evaluation in the country or region where the power cord set will be used The power cord sets must have a minimum curre...

Page 123: ...T 3 or equivalent No 18 AWG 3 conductor The wall plug must be a two pole grounding type with a NEMA 5 15P 15 A 125 V or NEMA 6 15P 15 A 250 V configuration 3 The appliance coupler flexible cord and wall plug must bear a T mark and registration number in accordance with the Japanese Dentori Law The flexible cord must be Type VCT or VCTF 3 conductor 1 00 mm conductor size The wall plug must be a two...

Page 124: ...ht When removing these components handle them carefully Materials Disposal This HP product contains mercury in the backlight in the display assembly that might require special handling at end of life Disposal of mercury might be regulated because of environmental considerations For disposal or recycling information contact your local authorities or see the Electronic Industries Alliance EIA websit...

Page 125: ...move all screw covers 1 and screws 2 that secure the display bezel to the display assembly 2 Lift up and out on the left and right inside edges 1 and the top and bottom inside edges 2 of the display bezel until the bezel disengages from the display assembly 3 Remove the display bezel 3 ...

Page 126: ...verter and remove the inverter 2 5 Remove all screws 1 that secure the display panel assembly to the display enclosure 6 Remove the display panel assembly 2 from the display enclosure 7 Turn the display panel assembly upside down 8 Remove all screws that secure the display panel frame to the display panel ...

Page 127: ...nel frame 10 Remove the display panel frame 2 from the display panel 11 Remove the screws 1 that secure the backlight cover to the display panel 12 Lift the top edge of the backlight cover 2 and swing it outward 13 Remove the backlight cover 14 Turn the display panel right side up 15 Remove the backlight cables 1 from the clip 2 in the display panel ...

Page 128: ...de down ÅWARNING The backlight contains mercury Exercise caution when removing and handling the backlight to avoid damaging this component and causing exposure to the mercury 17 Remove the backlight frame from the display panel 18 Remove the backlight from the backlight frame ...

Page 129: ...m the LCD panel 20 Remove the screws 2 that secure the LCD panel to the display rear panel 21 Release the LCD panel 3 from the display rear panel 22 Release the tape 4 that secures the LCD panel to the display rear panel 23 Remove the LCD panel 24 Recycle the LCD panel and backlight ...

Page 130: ...2 2 2 6 battery release latch 2 10 Bluetooth module removal 4 38 spare part numbers 3 7 3 15 4 38 Bluetooth module cable removal 4 38 spare part numbers 3 7 3 15 4 38 Blu ray ROM with LightScribe DVD R RW SuperMulti Double Layer Drive precautions 4 2 removal 4 20 spare part numbers 3 15 4 20 specifications 6 4 boot options 5 4 boot order 5 4 bottom components 2 10 button components 2 3 button soun...

Page 131: ...ers 3 15 DVD RW and CD RW SuperMulti Double Layer Combo Drive with LightScribe precautions 4 2 removal 4 20 spare part numbers 3 15 4 20 specifications 6 5 E electrostatic discharge 4 2 equipment guidelines 4 4 eSATA USB port 2 9 esc key 2 4 Ethernet product description 1 2 exiting Setup Utility 5 3 external media card product description 1 3 external monitor port connector pinout 9 2 illustrated ...

Page 132: ...val 4 10 spare part numbers 3 7 3 12 3 13 4 10 memory module compartment 2 10 memory module cover illustrated 3 9 memory product description 1 2 memory test 5 4 microphone jack connector pinout 8 1 location 2 6 microphone module illustrated 2 5 product description 1 2 removal 4 34 spare part numbers 3 8 3 14 4 34 Mini Card bracket spare part numbers 3 15 Mini Card compartment cover illustrated 3 9...

Page 133: ... device 1 3 ports 1 3 power requirements 1 3 processor 1 1 security 1 4 serviceability 1 4 webcam 1 2 wireless 1 3 product name 1 1 3 1 4 5 product number 3 1 R rear components 2 7 recovery full system 7 1 7 5 programs or drivers 7 1 using the recovery discs 7 6 using the recovery partition 7 6 recovery discs creating 7 2 defined 7 1 performing a recovery 7 6 Recovery Manager 7 1 recovery partitio...

Page 134: ...s 6 11 6 13 system information 5 3 system interrupt specifications 6 9 6 10 system recovery 7 1 system restore points 7 1 7 3 7 4 T tools required 4 1 top components 2 1 top cover removal 4 35 spare part numbers 3 3 3 12 4 35 TouchPad 2 1 TouchPad button 2 1 TouchPad components illustrated 2 1 TouchPad light 2 1 TouchPad on off button 2 1 TouchPad scroll zone 2 1 U Universal Serial Bus USB port co...

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