Acer ASPIRE 5251 Service Manual Download Page 148

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Chapter 4

Power On Issue

If the system doesn’t power on, perform the following actions one at a time to correct the problem. Do not
replace a non-defective FRUs:

Computer Shutsdown Intermittently

If the system powers off at intervals, perform the following actions one at a time to correct the problem.

Check the power cable is properly connected to the computer and the electrical outlet.

Remove any extension cables between the computer and the outlet.

Remove any surge protectors between the computer and the electrical outlet. Plug the computer directly
into a known good electrical outlet.

Disconnect the power and open the casing to check the Thermal Unit (see “Thermal Unit Failure” on page
148) and fan airways are free of obstructions.

Remove all external and non-essential hardware connected to the computer that are not necessary to
boot the computer to the failure point.

Remove any recently installed software.

If the Issue is still not resolved, see “Online Support Information” on page 195.

Summary of Contents for ASPIRE 5251

Page 1: ...Aspire 5251 5551G 5551 Series Service Guide PRINTED IN TAIWAN Service guide files and updates are available on the ACER CSD web for more information please refer to http csd acer com tw...

Page 2: ...II Revision History Please refer to the table below for the updates made on Aspire 5251 5551G 5551 service guides Date Chapter Updates...

Page 3: ...expressed or implied with respect to the contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular purpose Any Acer Incorporated software described in...

Page 4: ...MESSAGES Denotes actual messages that appear on screen NOTE Gives bits and pieces of additional information related to the current topic WARNING Alerts you to any damage that might result from doing...

Page 5: ...NOT be covered in this generic service guide In such cases please contact your regional offices or the responsible personnel channel to provide you with further technical details 2 Please note WHEN OR...

Page 6: ...VI...

Page 7: ...HDD BIOS Password Utilities 37 Machine Disassembly and Replacement 43 Disassembly Requirements 43 Pre disassembly Instructions 44 Disassembly Process 45 External Module Disassembly Process 46 Externa...

Page 8: ...Reassembly Procedure 109 Replacing the CPU 109 Replacing the Thermal Module 110 Replacing the Mainboard 112 Replacing the Bluetooth Board 115 Replacing the USB Board 116 Replacing the Card Reader Boa...

Page 9: ...g Password Check and BIOS Recovery 159 Clearing Password Check 159 Clear CMOS Jumper 159 BIOS Recovery by Crisis Disk 160 FRU Field Replaceable Unit List 161 Aspire 5251 5551G 5551 Exploded Diagrams 1...

Page 10: ...X Table of Contents...

Page 11: ...1 5551G System Memory Dual channel DDR3 SDRAM support Up to 4 GB of DDR3 1066 MHz memory upgradeable to 8 GB using two soDIMM modules for 64 bit OS Display 15 6 HD 1366 x 768 pixel resolution high bri...

Page 12: ...finition audio support Built in microphone MS Sound compatible Storage 160 250 320 500 640 GB or larger hard disk drive Multi in 1 card reader supporting Secure Digital SD Card MultiMediaCard MMC Memo...

Page 13: ...cell battery pack Power subsystem ACPI 3 0 CPU power management standard supports Standby and Hibernation power saving modes 3 pin 65 W AC adapter 108 W x 46 D x 29 5 H mm 4 25 x 1 81 x 1 16 inches 2...

Page 14: ...Ethernet RJ 45 port DC in jack for AC adapter Optional Items 1 GB 2 GB 4 GB DDR3 1066 MHz soDIMM module 6 cell Li ion battery pack 3 pin 65 W AC adapter External USB 56K modem Environment Temperature...

Page 15: ...D Conn port 0 CMOS Camera USB port 0 1 2 USB SATA ODD Conn Mini card WL X1 port 1 USB port 5 USB port 12 USB port 8 Dual Channel BANK 0 1 2 3 204pin DDRIII SO DIMM X2 1 5V DDRIII 1066 1333MHz Memory B...

Page 16: ...so called Liquid Crystal Display LCD displays computer output 3 HDD Indicates when the hard disk drive is active Communication indicator Indicates the computer s wireless connectivitoy device status 4...

Page 17: ...r 10 Speakers Left and right speakers deliver stereo audio output 11 Microphone Internal microphone for recording sound No Icon Item Description 1 Multi in 1 card reader Accepts Secure Digital SD Mult...

Page 18: ...ts up when the optical drive is active 4 Optical drive eject button Ejects the optical disk from the drive 5 Emergency eject hole Ejects the optical drive tray when the computer is turned off Note Ins...

Page 19: ...ry lock Locks the battery in position 6 Ventilation slots and cooling fan Enable the computer to stay cool even after prolonged use Note Do not cover or obstruct the fan opening Icon Function Descript...

Page 20: ...Pad keep it and your fingers dry and clean The TouchPad is sensitive to finger movement hence the lighter the touch the better the response Tapping too hard will not increase the TouchPad s responsive...

Page 21: ...d embedded numeric keypad The keyboard has two lock keys which you can toggle on and off Lock key Description Caps Lock When Caps Lock is on all alphabetic characters typed are in uppercase Scroll Loc...

Page 22: ...ork domain M Minimizes all windows R Open the Run dialog box T Cycle through programs on the taskbar U Open Ease of Access Center X Open Windows Mobility Center BREAK Display the System Properties dia...

Page 23: ...y toggle Switches display output between the display screen external monitor if connected and both Fn F6 Display Off Turns the display screen backlight off to save power Press any key to return Fn F7...

Page 24: ...12M DDR3 VRAM ENE KB926 for Keyboard Controller Battery management Unit and RTC Realtek RTS5160 for Card Reader 5 in 1 controller Realtek ALC272 X for High Definition Audio Codec Broadcom BCM57780A1KM...

Page 25: ...0 4000 40 95 4000 40 Operation Mode Application SPL dBA Loudness Sone Tone dB Fan off Windows Idle HDD random seek N A 20 3 99kHz less than or equal to 0 035 4K 20kHz less than or equal to 0 035 7 Fan...

Page 26: ...OS 2 3 PCI2 2 Refer to Acer BIOS specification DMI utility for BIOS serial number configurable asset tag Support PXE Support Y2K solution Support WinFlash Wake on LAN from S3 Wake on LAN form S4 in AC...

Page 27: ...PCI Express CLKREQ support Integrated switching regulator for improved power consumption IPv4 and IPv6 large send offload and checksum offload LSO TCO Item Specification Vendor model name Foxconn Wir...

Page 28: ...ROM Power Down Super I O Low Power mode Sleeping State S4 Also called Hibernate state System Saves all system states and data onto disk prior to power off the whole system Item Specification Controlle...

Page 29: ...a disc CD ROM Mode 2 data disc CD ROM XA CD I Photo CD Multi Session Video CD CD Audio Disc Mixed mode CD ROM disc data and audio CD Extra CD Text CD R Conforming to Orange Book Part 2 read write CD R...

Page 30: ...tions VGA Aspire 5251 5551 All resolutions up to 2456 x 1536 60 Hz Aspire 5551G All resolutions up to 2048 x 1536 85 Hz HDMI Aspire 5251 5551 5551G All resolutions up to 1920 x 1080 60 Hz Resolution A...

Page 31: ...ll Time msec 8 Luminance Uniformity 1 25 max Electrical Interface LVDS Support Color 262K Viewing Angle up down right left 15 35 45 45 Temperature Range C Operating Storage shipping 0 to 50 20 to 60 I...

Page 32: ...ication Version 2 0 Compliant with Multimedia Card Specification Version 4 2 Support High Speed SD 4 bit Data Transfer Mode Up to 32 GB Support High Speed MMC 8 bit Data Transfer Mode Up to 32 GB Supp...

Page 33: ...tegrated digital BEEP generator Headphone amplifier on port I HP OUT is designed to drive output without external DC blocking capacitors Supports EAPD External Amplifier Power Down control for externa...

Page 34: ...24 Chapter 1...

Page 35: ...multi boot menu In this menu user can change boot device without entering BIOS SETUP Utility Navigating the BIOS Utility There are five menu options Information Main Security Boot and Exit Follow the...

Page 36: ...ct name of the system Manufacturer Name This field displays the manufacturer of this system UUID Universally Unique Identifier UUID is an identifier standard used in software construction standardized...

Page 37: ...the system boot from LAN remote server Option Enabled or Disabled F12 Boot Menu Enables disables Boot Menu during POST Option Enabled or Disabled D2D Recovery Enables disables D2D Recovery function T...

Page 38: ...r Password Press Enter to set the user password When user password is set this password protects the BIOS Setup Utility from unauthorized access The user can enter Setup menu only and does not have ri...

Page 39: ...r Password parameter to Set 4 If desired you can opt to enable the Power on Password parameter 5 When you are done press F10 to save the changes and exit the BIOS Setup Utility Removing a Password Fol...

Page 40: ...eter 6 When you are done press F10 to save the changes and exit the BIOS Setup Utility If the verification is OK the screen will display as following The password setting is complete after the user pr...

Page 41: ...move it down the list or F6 to move it up the list Press Esc to escape the menu F1 ESC Help Exit Select Item Select Menu Change Values Select SubMenu Enter F9 F10 Setup Default Save and Exit Boot pri...

Page 42: ...ault values for all Setup items Discard Changes Load previous values for all Setup items Save Changes Save setup data Item Specific Help Exit System Setup and save your changes to CMOS F1 ESC Help Exi...

Page 43: ...y Diskette before you use the Flash utility NOTE Do not install memory related drivers XMS EMS DPMI when you use the Flash NOTE Please use the AC adaptor power supply when you run the Flash utility If...

Page 44: ...lect a device then press F5 to move it down the list or F6 to move it up the list Press Esc to escape the menu F1 ESC Help Exit Select Item Select Menu Change Values Select SubMenu Enter F9 F10 Setup...

Page 45: ...e message Please do not remove AC Power Source displays NOTE If the AC power is not connected the following message displays Plug in the AC power to continue 5 Flash is complete when the message Flash...

Page 46: ...36 Chapter 2 WinFlash Utility Perform the following steps to use the WinFlash Utility 1 Double click the WinFlash executable 2 Click OK to begin the update A progress screen displays...

Page 47: ...is displayed select the Enter Unlock Password option on the screen 2 An Encode key is generated for unlocking utilities Note down this key 3 Execute the UnlockHD EXE file to create the unlock code in...

Page 48: ...etal instrument to short the J1 point Cleaning BIOS Passwords To clean the User or Supervisor passwords perform the following steps 1 From a DOS prompt execute clnpwd exe 2 Press 1 or 2 to clean the d...

Page 49: ...ged without accessing the BIOS To use Boot Sequence Selector perform the following steps 1 Enter into DOS 2 Execute BS exe to display the usage screen 3 Select the desired boot sequence by entering th...

Page 50: ...te serial number to eeprom max 22 characters dmitools wu xxxx Write uuid to eeprom dmitools wa xxxx Write asset tag to eeprom max 32 characters The following examples show the commands and the corresp...

Page 51: ...the EEPROM under DOS mode 1 Use a text editor for example Notepad to open the MAC CFG file You can see the MAC CFG contents as below 2 In DOS mode run the MAC BAT file to write MAC values to eeprom Wr...

Page 52: ...42 Chapter 2...

Page 53: ...oting Disassembly Requirements To disassemble the computer you need the following tools Wrist grounding strap and conductive mat for preventing electrostatic discharge Flat screwdriver Philips screwdr...

Page 54: ...th the disassembly procedure make sure that you do the following 1 Turn off the power to the system and all peripherals 2 Unplug the AC adapter and all power and signal cables from the system 3 Place...

Page 55: ...ernal module disassembly Main unit disassembly LCD module disassembly The flowcharts provided in the succeeding disassembly sections illustrate the entire disassembly sequence Observe the order of the...

Page 56: ...nts that need to be removed during servicing For example if you want to remove the keyboard you must first remove the switch board Screw List Step Screw Quantity Part No ODD Module M 2 5 8 1 ODD Brack...

Page 57: ...Turn computer over Slide the battery lock in the direction shown 2 Slide and hold the battery release latch to the release position 1 then lift out the battery pack from the main unit 2 NOTE Please f...

Page 58: ...48 Chapter 3 Removing the SD Dummy Card 1 Push the SD dummy card all the way in to eject it 2 Pull it out from the slot...

Page 59: ...ing the Optical Drive Module 1 See Removing the Battery Pack on page 47 2 Remove the screw securing the ODD module 3 Pull the optical drive module out from the chassis Step Size Quantity Screw Type OD...

Page 60: ...two 2 screws securing the ODD bracket and remove the ODD bracket from the optical disk drive module 5 Remove the ODD bezel by prying the top edge away and clear of the module Step Size Quantity Screw...

Page 61: ...Door 1 Remove two 2 screws from the logic lower door 2 Lift the door beginning from the inner edge as shown 3 Lift the door clear of the device exposing the HDD DIMM and WLAN modules Step Size Quantit...

Page 62: ...52 Chapter 3 Removing the 3G Cover 1 Remove one 1 screw from the 3G Cover 2 Lift the 3G Cover from the right edge first then remove completely Step Size Quantity Screw Type 3G Cover M2 3 1...

Page 63: ...Module 1 See Removing the Logic Lower Door on page 51 2 Push out the release latches on both sides of the DIMM socket to release the DIMM module 3 Remove the DIMM module 4 Repeat steps 2 and 3 for the...

Page 64: ...r on page 51 2 Disconnect the antenna cables from the WLAN Board NOTE Cable placement is Black to the MAIN terminal and White to the AUX terminal 3 Move the antenna away and remove the two 1 screws to...

Page 65: ...Chapter 3 55 4 Detach the WLAN Board from the WLAN socket NOTE When reattaching the antennas ensure the cables are tucked into the chassis to prevent damage...

Page 66: ...Logic Lower Door on page 51 2 Using the pull tab slide the HDD Module in the direction of the arrow to disconnect the interface 3 Lift the HDD Module clear of the HDD bay NOTE To prevent damage to dev...

Page 67: ...Chapter 3 57 4 Remove the four 4 screws two each side securing the hard disk to the carrier 5 Remove the HDD from the carrier Step Size Quantity Screw Type HDD Carrier M3 3 4...

Page 68: ...Power Board M2 3 2 Card Reader M2 3 1 USB Board M2 3 1 TouchPad Bracket M2 3 1 Mainboard M2 5 5 1 Thermal Module M1 98 3 4 Remove Mainboard Remove Keyboard Remove Upper Cover Remove Power Board Remove...

Page 69: ...emoving the Keyboard 1 Unlock the six 6 keyboard locks 2 Pry up the centre of the Keyboard and rotate it upward away from the Upper Cover 3 Turn the keyboard over on to the TouchPad area to expose the...

Page 70: ...60 Chapter 3 4 Open the locking latch and disconnect the FFC from the mainboard 5 Lift the keyboard clear of the Upper Cover...

Page 71: ...nal Module Disassembly Process on page 46 2 Turn the computer over Remove the eleven 11 screws on the lower cover and four 4 screws from the battery bay Step Size Quantity Screw Type Lower Cover red c...

Page 72: ...62 Chapter 3 3 Turn the computer over and disconnect the following four 4 cables from the Mainboard A B C D...

Page 73: ...pull tabs on FFCs whenever available to prevent damage 4 Release the locking latch on A 5 Disconnect A as shown 6 Release the locking latch on B and remove the cable as shown 7 Release the locking lat...

Page 74: ...shown 10 Starting at the top right side of the cover pry apart the Upper and Lower Covers as shown Work along the front edge of the casing to the left as shown then lift the Upper Cover clear of the...

Page 75: ...page 61 2 Locate the Left Speaker Module on the Upper Cover as shown 3 Remove two 2 screws from the left speaker module 4 Remove the Speaker cable from the cable channel Ensure that the cable is free...

Page 76: ...66 Chapter 3 5 Lift the Speaker clear of the Upper Cover...

Page 77: ...ate the Right Speaker Module on the Upper Cover as shown 3 Remove the two 2 securing screws from the Right Speaker Module 4 Remove the Right Speaker Module cable from the cable channel Ensure that the...

Page 78: ...68 Chapter 3 5 Lift the Right Speaker Module clear of the device...

Page 79: ...2 Turn the upper cover over and remove the power board cable Pass the cable through the upper cover as shown 3 Remove two 2 screws from the power board 4 Remove the power board assembly and lift the p...

Page 80: ...e removed individually To replace the TouchPad Board replace the entire Upper Cover 1 See Removing the Upper Cover on page 61 2 Lift the FFC to detach the adhesive securing the cable to the Upper Cove...

Page 81: ...Chapter 3 71 4 Remove the one 1 screw from TouchPad bracket 5 Pry the Touchpad bracket off the adhesive and remove it as shown Step Size Quantity Screw Type TouchPad Bracket M2 3 1...

Page 82: ...1 See Removing the Upper Cover on page 61 2 Unlock the mainboard to card reader cable connector 3 Remove one 1 screw from the card reader board 4 Lift the card reader board clear of the device Step S...

Page 83: ...e USB Board 1 See Removing the Upper Cover on page 61 2 Unlock the mainboard to USB cable connector 3 Peel the cable off the adhesive as shown 4 Remove one 1 screw from the USB board Step Size Quantit...

Page 84: ...74 Chapter 3 5 Lift the USB board clear of the device...

Page 85: ...ng the Bluetooth Board 1 See Removing the Upper Cover on page 61 2 Pry the Bluetooth board from the adhesive 3 Disconnect the mainboard to Bluetooth cable 4 Lift the Bluetooth board away from the cabl...

Page 86: ...76 Chapter 3 Removing the Mainboard 1 See Removing the Upper Cover on page 61 2 Disconnect the speaker to mainboard cable 3 Disconnect the LVDS cable...

Page 87: ...pter 3 77 4 Remove the one 1 securing screw from the Mainboard 5 Place a dust free protective mat on the lcd screen to aid in the removal of the mainboard Step Size Quantity Screw Type Mainboard M2 5...

Page 88: ...rd completely from the chassis CAUTION Do not remove the mainboard completely The mainboard is still connected to the chassis 7 Carefully turn the mainboard over and place it on the protective mat CAU...

Page 89: ...from the chassis and turn it over NOTE Circuit boards 10 cm have been highlighted with a yellow rectangle as shown in the previous image Please detach the Circuit board and follow local regulations f...

Page 90: ...80 Chapter 3 11 Disconnect the Bluetooth to mainboard cable...

Page 91: ...Removing the Upper Cover on page 61 2 Disconnect the fan cable 3 Remove the four 4 securing screws in reverse numerical order from screw 4 to 1 then the two 2 screws on the GPU Step Size Quantity Scre...

Page 92: ...82 Chapter 3 4 Carefully lift the Thermal Module clear of the Mainboard...

Page 93: ...te If they are damaged the CPU may malfunction Place the CPU on a clean dry surface when it is not installed 1 See Removing the Thermal Module on page 81 2 Using a flat bladed screw driver rotate the...

Page 94: ...wchart Screw List Step Screw Quantity Part No LCD Assy M2 5 5 4 LCD Bezel M2 5 6 2 LCD Panel M2 5 5 2 LCD Brackets M2 3 6 Remove LCD Assembly Remove Camera Module Remove LCD Bezel Remove LCD Panel Rem...

Page 95: ...e Upper Cover on page 61 2 Turn the device over and pass the black and white antenna cables through the lower cover 3 Free the black and white antenna cables from the cable channel as shown 4 Continue...

Page 96: ...86 Chapter 3 5 Remove the LVDS cable from the cable channel 6 Remove the adhesive tape from the black antenna cable 7 Free the cable from the cable channel as shown...

Page 97: ...Chapter 3 87 8 Remove four 4 screws from the LCD assembly 9 Remove the LCD assembly from the lower cover Step Size Quantity Screw Type LCD assembly M2 5 5 4...

Page 98: ...he bottom edge of the bezel pry the bezel upwards and away from the panel Work along the right side toward the top of the bezel prying the covers apart Continue along the top edge and down the left si...

Page 99: ...pter 3 89 Removing the Camera Module 1 See Removing the LCD Assembly on page 85 2 Locate the Camera Module at the top of the LCD Module and disconnect the camera cable 3 Remove the Camera from the mod...

Page 100: ...e Removing the Camera Module on page 89 2 Remove the four 4 securing screws from the LCD Panel 3 Remove the adhesive strip holding the cables in place 4 Lift the LCD Panel clear of the module Step Siz...

Page 101: ...LVDS Cable 1 See Removing the LCD Panel on page 90 2 Remove the six 6 securing screws three on each side from the LCD Panel brackets 3 Remove the LCD brackets by pulling away from the LCD Panel Step S...

Page 102: ...92 Chapter 3 4 Turn the LCD panel over to expose the rear Pull the cable up as shown 5 Remove the adhesive tape from the cable 6 Peel back the mylar securing the LVDS cable...

Page 103: ...Chapter 3 93 7 Disconnect the LVDS cable from the panel...

Page 104: ...ophone Cable 1 See Removing the LCD Panel on page 90 2 Remove the cable bundle from the hinge channel 3 Peel back the foil tabs and remove the microphone cable from the cable channel 4 Peel back the f...

Page 105: ...Chapter 3 95 5 Lift the microphone set and cable clear of the LCD cover...

Page 106: ...the Antennas 1 See Removing the LCD Panel on page 90 2 Remove the black antenna from the cable channel 3 Peel back the foil tabs and remove the cable from the cable channel 4 Pry the antenna assembly...

Page 107: ...Chapter 3 97 5 Remove the white antenna from the hinge channel 6 Peel back the foil tabs and remove the cable from the cable channel 7 Pry the antenna assembly clear of the device...

Page 108: ...y Procedure Replacing the Antennas 1 Adhere the white antenna assembly to the LCD cover 2 Run the cable along the cable channel and fold over the foil tabs to secure the cable in place 3 Run the white...

Page 109: ...3 99 4 Adhere the black antenna assembly on the LCD cover 5 Run the cable along the cable channel and fold over the foil tabs to secure the cable in place 6 Run the black antenna cable along the cable...

Page 110: ...able channel 3 Fold over the foil tabs and continue running the microphone cable along the cable channel indicated between the red callouts 4 Run the cable bundle along the hinge channel IMPORTANT Ens...

Page 111: ...101 Replacing the LCD Brackets and LVDS Cable 1 Connect the LVDS cable to the LCD panel 2 Adhere the LVDS mylar to the LCD panel 3 Adhere the LVDS cable to the panel by running it between the callouts...

Page 112: ...102 Chapter 3 4 Attach the LCD brackets to the LCD Panel 5 Replace six 6 securing screws three on each side of the LCD Panel brackets...

Page 113: ...cing the LCD Panel 1 Place the LCD Panel in the module as shown 2 Run the cable along the channel in the LCD Module as shown 3 Run the cable through the left hinge channel 4 Secure the panel using fou...

Page 114: ...104 Chapter 3 Replacing the Camera Module 1 Place the Camera in the module 2 Connect the camera cable...

Page 115: ...1 Replace the bezel and press down until there are no gaps between the bezel and the LCD Module IMPORTANT Ensure that the LCD cables pass through the hinge wells and are not trapped by the bezel 2 Re...

Page 116: ...106 Chapter 3 Replacing the LCD Assembly 1 Place the LCD assembly on the lower cover 2 Secure the LCD assembly using four 4 screws...

Page 117: ...Chapter 3 107 3 Run the black antenna cable along the cable channel 4 Replace the adhesive tape to secure the cable to the chassis 5 Near the left hinge run the LVDS cable along the cable channel...

Page 118: ...r 3 6 Run the white antenna cable along the cable channel as shown 7 Continue running the black and white antenna cables along the cable channel 8 Pass the black and white antenna cables through the l...

Page 119: ...thermal grease types are approved for use N 302 Dimand TIM Grease Honeywell IMPORTANT The CPU has a Pin1 locator that must be positioned corresponding to the marker on the CPU socket 1 Place the CPU i...

Page 120: ...a lint free cloth or cotton swab and Isopropyl Alcohol Acetone 1 or other approved cleaning agent 2 Apply a small amount of thermal grease to the centre of the CPU there is no need to spread the greas...

Page 121: ...Chapter 3 111 5 Connect the fan cable...

Page 122: ...112 Chapter 3 Replacing the Mainboard 1 Connect the Bluetooth to mainboard cable 2 Apply the adhesive tape to the Bluetooth cable 3 Connect the power cable...

Page 123: ...eft edge of the mainboard in first to line up the I O ports before lowering the mainboard into the chassis NOTE Ensure the I O ports are positioned correctly through the casing 5 Secure the one 1 secu...

Page 124: ...114 Chapter 3 6 Connect the LVDS cable to the mainboard 7 Connect the microphone cable...

Page 125: ...Chapter 3 115 Replacing the Bluetooth Board 1 Run the Bluetooth cable along the channel as shown 2 Connect the mainboard to Bluetooth cable 3 Adhere the Bluetooth board to the adhesive...

Page 126: ...116 Chapter 3 Replacing the USB Board 1 Place the USB board in the device 2 Secure the one 1 screw on the USB board 3 Adhere the cable to the chassis as shown...

Page 127: ...Chapter 3 117 4 Connect the USB cable to the mainboard and lock the connector...

Page 128: ...118 Chapter 3 Replacing the Card Reader Board 1 Place the card reader board in the device 2 Secure one 1 screw on the card reader board 3 Connect the card reader cable and lock the connector...

Page 129: ...1 Replace the TouchPad bracket top edge first to engage the securing clips and press down firmly 2 Replace the one 1 screws to secure the TouchPad Bracket to the Upper Cover 3 Replace the TouchPad FFC...

Page 130: ...120 Chapter 3 4 Replace the FFC and press down as indicated to secure it to the Upper Cover...

Page 131: ...ard 1 Place the power board in the upper cover Ensure that the assembly fits inside the bracket securely 2 Secure two 2 screws on the power board 3 Pass the power board cable through the upper cover A...

Page 132: ...hapter 3 Replacing the Right Speaker Module 1 Place the right speaker module in the chassis as shown 2 Run the speaker cable along the channel 3 Secure the two 2 securing screws on the Right Speaker M...

Page 133: ...er 3 123 Replacing the Left Speaker Module 1 Place the module right side first on the Upper Cover as shown 2 Run the Speaker cable along the cable channel 3 Secure two 2 screws from the left speaker m...

Page 134: ...124 Chapter 3 Replacing the Upper Cover 1 Place the Upper Cover on the Lower Cover as shown and press all sides are firmly in place 2 Secure the seven 7 screws on the Upper Cover as shown...

Page 135: ...Chapter 3 125 3 Connect the following cables to the Mainboard 4 Connect D as shown 5 Connect C as shown A B C D...

Page 136: ...126 Chapter 3 6 Connect B as shown 7 Connect A and lock as shown 8 Turn the computer over Remove the eleven 11 screws on the lower cover and four 4 screws from the battery bay...

Page 137: ...27 Replacing the Keyboard 1 Connect the Keyboard FFC to the Mainboard and close the locking latch to secure the cable in place 2 Replace the Keyboard by first lining up the bottom edge Press down firm...

Page 138: ...Drive Module 1 Place the HDD in the HDD carrier 2 Replace the four 4 screws two each side to secure the carrier 3 Insert the HDD as indicated and lower it into place 4 Slide the HDD in the direction...

Page 139: ...nsert the WLAN Module into the WLAN socket 2 Replace the two 2 screws to secure the module 3 Connect the two 2 Antenna cables to the module NOTE The black cable connects to the upper terminal MAIN and...

Page 140: ...130 Chapter 3 Replacing the DIMM Modules 1 Insert the DIMM Module in place 2 Press down to lock the DIMM module in place 3 Repeat steps for the second DIMM module if present...

Page 141: ...Chapter 3 131 Replacing the 3G Cover 1 Line up the left edge of the 3G cover with the device before replacing completely 2 Replace one 1 screw on the 3G Cover...

Page 142: ...132 Chapter 3 Replacing the Logic Lower Door 1 Replace the lower cover by first lining up the top edge as shown 2 Secure two 2 screws on the lower cover...

Page 143: ...the tray bottom edge first to secure it to the ODD Module 2 Place the bracket on the ODD module 3 Secure the ODD bracket with the two 2 screws 4 Push the ODD Module into the ODD bay until it is flush...

Page 144: ...134 Chapter 3 Replacing the SD Dummy Card 1 Insert the SD Dummy Card into the slot as shown 2 Push until the card clicks into place and is flush with the casing...

Page 145: ...Replacing the Battery 1 Slide and hold the battery release latch to the release position 1 insert the battery pack and press down 2 2 Slide the battery lock in the direction shown to secure the batter...

Page 146: ...136 Chapter 3...

Page 147: ...by running the diagnostic test or by repeating the same operation 3 Use the following table with the verified symptom to determine which page to go to 4 If the Issue is still not resolved see Online...

Page 148: ...extension cables between the computer and the outlet 3 Remove any surge protectors between the computer and the electrical outlet Plug the computer directly into a known good electrical outlet 4 Disc...

Page 149: ...power see Power On Issue on page 138 3 Drain any stored power by removing the power cable and battery and holding down the power button for 10 seconds Reconnect the power and reboot the computer 4 Con...

Page 150: ...e Resolution slider to the desired resolution e Click Apply and check the display Readjust if necessary 6 Roll back the video driver to the previous version if updated 7 Remove and reinstall the video...

Page 151: ...e following actions one at a time to correct the problem Do not replace a non defective FRUs Built In Keyboard Failure If the built in Keyboard fails perform the following actions one at a time to cor...

Page 152: ...perform the following actions one at a time to correct the problem Do not replace a non defective FRUs Internal Speaker Failure If the internal Speakers fail perform the following actions one at a tim...

Page 153: ...Speaker Setup Follow the onscreen prompts to configure the speakers 8 Remove and recently installed hardware or software 9 Restore system and file settings from a known good date using System Restore...

Page 154: ...ate and resolve issues with the computer i When complete click Finish If an issue is discovered follow the onscreen information to resolve the problem 4 Run the Windows Memory Diagnostic Tool For more...

Page 155: ...eaks up or jumps Optical drive not found or not active Not shown in My Computer or the BIOS setup LED does not flash when the computer starts up The tray does not eject Access failure screen displays...

Page 156: ...Movie fields select the desired player from the drop down menu 5 Check that the Regional Code is correct for the selected media IMPORTANT Region can only be changed a limited number of times After Cha...

Page 157: ...rboard and cable connections c Try an alternate cable if available If the drive works with the new cable the original cable should be replaced 4 Reseat the drive ensuring and all cables are connected...

Page 158: ...ls perform the following actions one at a time to correct the problem Do not replace a non defective FRUs Thermal Unit Failure If the Thermal Unit fails perform the following actions one at a time to...

Page 159: ...is not fixed repeat the preceding steps and select an earlier time and date 9 Run the Event Viewer to check the events log for errors For more information see Windows Help and Support 10 Roll back th...

Page 160: ...er a short circuit is suspected or whether the system is inoperative Follow these procedures to isolate the failing FRU do not isolate non defective FRU NOTE Verify that all attached devices are suppo...

Page 161: ..._PEICORE SEC 0A Enter Boot Firmware Volume Functionality Name Include PostCode h Phase Post Code Description PEI_SIO_INIT PEI 70 Super I O Initialization PEI_CPU_REG_INIT PEI 71 CPU Early Initializati...

Page 162: ...RIABLE_INIT_FAIL DXE 4C Fail to initial Variable Service DXE_MTC_INIT DXE 4D MTC Initial DXE_CPU_INIT DXE 4E CPU Middle Initialization DXE_MP_CPU_INIT DXE 4F Multi processor MiddleInitialization DXE_S...

Page 163: ...T_OPTION BDS 27 Get boot device information BDS_END_OF_BOOT_SELECTION BDS 28 End of boot selection BDS_ENTER_SETUP BDS 29 Enter Setup Menu BDS_ENTER_BOOT_MANAGER BDS 2A Enter Boot manager BDS_BOOT_DEV...

Page 164: ...Flash device in SMM SMM_SMM_PLATFORM_INIT SMM 0xA2 SMM service initial SMM_ACPI_ENABLE_START SMM 0xA6 OS call ACPI enable function SMM_ACPI_ENABLE_END SMM 0xA7 ACPI enable function complete SMM_S1_SLE...

Page 165: ...to Right Speaker LED1 LED2 Power State Indicator JSPK2 Connect to Left Speaker LED3 LED4 Battery Charging Indicator JKB1 Connect to Keyboard JLED1 Connect to Power board FFC NEW95 JTP1 Connect to Touc...

Page 166: ...D1 Connect to SATA ODD JDIMM1 JDIMM2 DDR3 Memory socket JFAN1 Connect to FAN JCRT1 Connect to external CRT JCPU1 CPU socket S1G4 JRJ45 RJ45 LAN U3 NB RS880M JHDMI1 HDMI connector U5 VGA JMINI1 Connect...

Page 167: ...For NEW75 ON OFF LED LED9 Not Use LED2 For NEW85 ON OFF LED LED10 For NEW75 WLAN LED LED3 For NEW95 ON OFF LED LED11 Not Use LED4 For NEW75 MEDIA LED LED12 For NEW95 WLAN LED LED5 For NEW85 MEDIA LED...

Page 168: ...158 Chapter 5 CR B Board LED8 For NEW85 WLAN LED ITEM DESCRIPTION JREAD1 Card reader connector ITEM DESCRIPTION ITEM DESCRIPTION...

Page 169: ...once it is necessary to bypass the password check users need to short the HW Gap to clear the password by the following steps 1 Power Off the system and remove HDD AC and Battery from the machine 2 Di...

Page 170: ...e system will force the BIOS to enter a special BIOS block called Boot Block Steps for BIOS Recovery from USB Storage Before doing this prepare the Crisis USB key The Crisis USB key could be made by e...

Page 171: ...ver reasons a part number change is made it will not be noted on the printed Service Guide For ACER AUTHORIZED SERVICE PROVIDERS your Acer office may have a DIFFERENT part number code from those given...

Page 172: ...Chapter 6 Aspire 5251 5551G 5551 Exploded Diagrams Main Assembly No Description Acer P N 1 Keyboard 2 Upper Cover 3 Mainboard 4 USB Board 5 Card Reader Board 6 Thermal Module 7 Lower Cover 1 2 3 4 5...

Page 173: ...Chapter 6 163 Base Assembly No Description Acer P N 1 Logic Lower Door 2 3G Door 3 Lower Cover 1 2 3...

Page 174: ...Chapter 6 LED Assembly No Description Acer P N 1 LCD Bracket L 2 LVDS Cable 3 ANTENNA WLAN MAIN 4 Microphone Cable 5 LCD Bezel 6 LCD Bracket R 7 LCD Panel 8 ANTENNA WLAN AUX 9 LCD Cover 1 2 3 4 5 6 7...

Page 175: ...Chapter 6 165 Aspire 5251 5551G 5551 FRU List...

Page 176: ...166 Chapter 6 Screw List...

Page 177: ...Chapter 6 167...

Page 178: ...251 1202G25Mn S2 PWJ02 001 WW WW AS5251 1202G25Mn W7HP64AWW1 MC UMACkk_3 2 1G 250 6L2 2 5R CB_bgn_1 3C_GEk_ES62 AS5251 1202G25Mn LX PUX02 001 PA USA AS5251 1202G25Mn W7HP64ATUS1 MC UMACsk_3 2 1G 250 6...

Page 179: ...X0C 00 1 SO1GBIII10 N N N320GB5 4K S N Model Acer Part No ODD Media Processor Extra SW1 Card Reader Wireless LAN1 AS5251 1202G25Mn LX PWJ02 005 NSM8XS N McAfee 5 in 1 Build in 3rd WiFi 2x2 BGN AS5251...

Page 180: ...gn_1 3C_GEs_IT11 AS5551G P324G32Mn LX PUU02 01 7 EMEA Italy AS5551G P324G32Mn W7HP64ATIT1 MC MADISON_PRO1GBCsk_3V3 2 2G 320 6L2 2 5R CB_bgn_1 3C_GEs_IT11 AS5551G P324G50Mn LX PUU02 01 6 AAP Australia...

Page 181: ...ARK_XT512Csk_3V3 1 2G 250 BT 6L2 2 5R CB_bgn_1 3C_GEs_TC11 AS5551G N833G32Mn LX PUS01 00 4 EMEA Turkey AS5551G N833G32Mn EM W7HB64EMATTR1 MC PARK_XT512Csk_3V3 2G 1G 320 6L2 2 5R CB_bgn_1 3C_GEs_TR31 A...

Page 182: ...2Csk_3V3 1 2G 320 6L2 2 5R CB_bgn_1 3C_GEs_ES61 AS5551G N334G32Mn LX PUS02 00 2 AAP Australia New Zealand AS5551G N334G32Mn W7HP64ATAU1 MC PARK_XT512Csk_3V3 2 2G 320 6L2 2 5R CB_bgn_1 3C_GEs_ES61 AS55...

Page 183: ...WXGAG MADISON_PR O 1G DDR3 64 16 8 SO2GBIII10 AS5551G N534G32Mn LX PUU02 003 ATN530 NLED15 6 WXGAG MADISON_PR O 1G DDR3 64 16 8 SO2GBIII10 AS5551G N334G32Mn LX PUU02 002 AAN330 NLED15 6 WXGAG MADISON_...

Page 184: ...D15 6 WXGAG PARK_XT 512M DDR3 64 16 4 SO2GBIII10 AS5551G N834G50Mn LX PUS02 006 APN830 NLED15 6 WXGAG PARK_XT 512M DDR3 64 16 4 SO2GBIII10 AS5551G P322G32Mn LX PUS02 005 AAP320 NLED15 6 WXGAG PARK_XT...

Page 185: ...B5 4 KS N AS5551G P524G50Mn LX PUU02 008 SO2GBIII10 N N N500GB5 4 KS N AS5551G P524G64Mn LX PUU02 007 SO2GBIII10 N N N640GB5 4 KS N AS5551G P524G50Mn LX PUU02 006 SO2GBIII10 N N N500GB5 4 KS N AS5551G...

Page 186: ...4 KS N AS5551G N834G50Mn LX PUS02 006 SO2GBIII10 N N N500GB5 4 KS N AS5551G P322G32Mn LX PUS02 005 N N N N320GB5 4 KS N AS5551G N534G32Mn LX PUS02 004 SO2GBIII10 N N N320GB5 4 KS N AS5551G N532G32Mn L...

Page 187: ...G P524G50Mn LX PUU02 006 NSM8XS N McAfee 5 in 1 Build in 3rd WiFi 2x2 BGN AS5551G N534G50Mn LX PUU02 005 NSM8XS N McAfee 5 in 1 Build in 3rd WiFi 2x2 BGN AS5551G N534G50Mn LX PUU02 004 NSM8XS N McAfee...

Page 188: ...n 1 Build in 3rd WiFi 2x2 BGN AS5551G N534G32Mn S2 PUS0C 001 NSM8XS N N 5 in 1 Build in 3rd WiFi 2x2 BGN AS5551G N834G50Mn LX PUS02 007 NSM8XS N McAfee 5 in 1 Build in 3rd WiFi 2x2 BGN AS5551G N834G50...

Page 189: ...1 AS5551 P524G50Mn LX PWK02 004 PA USA AS5551 P524G50Mn W7HP64ATUS1 MC UMACkk_3 2 2G 500_L 6L2 2 5R CB_bgn_1 3C_GEk_FRB1 AS5551 P323G32Mn LX PWK02 003 PA USA AS5551 P323G32Mn W7HP64ATUS1 MC UMACkk_3 2...

Page 190: ...51 N332G16Mn S2 PTQ0C 001 WW WW AS5551 N332G16Mn LINPUSAWW1 UMACsk_3 2 1G 160 BT 6L2 2 5R CB_bgn_1 3C_GEs_EN11 AS5551 N833G25Mn LX PTQ02 016 EME A UK AS5551 N833G25Mn W7HP64ATGB1 MC UMACsk_3 2G 1G 250...

Page 191: ...N SO2GBIII10 AS5551 P323G32Mn LX PWK02 008 AAP320 NLED15 6 WXGAG UMA N SO2GBIII10 AS5551 P323G32Mn LX PWK02 007 AAP320 NLED15 6 WXGAG UMA N SO2GBIII10 AS5551 P323G32Mn LX PWK02 006 AAP320 NLED15 6 WXG...

Page 192: ...WXGAG UMA N SO2GBIII10 AS5551 N833G32Mn LX PTQ02 014 APN830 NLED15 6 WXGAG UMA N SO2GBIII10 AS5551 P324G25Mn LX PTQ02 013 AAP320 NLED15 6 WXGAG UMA N SO2GBIII10 AS5551 P322G32Mn LX PTQ02 012 AAP320 N...

Page 193: ...2_BR3G25 M_brn LX PWP01 002 SO1GBIII13 _BR N N N250GB5 4 KS_BR N AS5551 1_BR3G25M _brn LX PWP01 001 SO1GBIII13 _BR N N N250GB5 4 KS_BR N AS5551 1_BR2G25M _brn S2 PWP02 001 N N N N250GB5 4 KS_BR N AS55...

Page 194: ...No ODD Media Processor Extra SW1 Card Reader Wireless LAN1 AS5551 P324G50Mn LX PWK02 011 NSM8XS N McAfee 5 in 1 Build in 3rd WiFi 2x2 BGN AS5551 P323G32Mn LX PWK02 010 NSM8XS N McAfee 5 in 1 Build in...

Page 195: ...McAfee 5 in 1 Build in 3rd WiFi 2x2 BGN AS5551 P323G32Mn LX PTQ02 019 NSM8XS N McAfee 5 in 1 Build in 3rd WiFi 2x2 BGN AS5551 P524G50Mn LX PTQ02 018 NSM8XS N McAfee 5 in 1 Build in 3rd WiFi 2x2 BGN AS...

Page 196: ...34G32Mn LX PTQ02 003 NSM8XS N McAfee 5 in 1 Build in 3rd WiFi 2x2 BGN AS5551 N334G32Mn LX PTQ02 002 NSM8XS N McAfee 5 in 1 Build in 3rd WiFi 2x2 BGN AS5551 N332G32Mn LX PTQ02 001 NSM8XS N McAfee 5 in...

Page 197: ...tem functions are tested under Windows 7 environment Refer to the following lists for components adapter cards and peripherals which have passed these tests Regarding configuration combination and tes...

Page 198: ...2 2 Battery PANASONIC AS10D Li Ion 3S2P PANASONIC 6 cell 4400mAh Main COMMON ID AS10D51 60013145 SAMSUNG SDI 6CELL2 2 Battery SAMSUNG AS10D Li Ion 3S2P SAMSUNG 6 cell 4400mAh Main COMMON ID AS10D61 60...

Page 199: ...00rpm 160GB WD1600BEVT 22A23T0 WD ML320S SATA 8MB LF F W 01 01A01 60002005 HGST SG N160GB5 4KS_BR HDD HGST 2 5 5400rpm 160GB HTS545016B9A300 HGST Panther B 250G P SATA 8MB LF F W C60F 60001994 WD N160...

Page 200: ...t SATA LF F W 0001SDM1 60002036 SEAGATE N500GB5 4KS HDD SEAGATE 2 5 5400rpm 500GB ST9500325AS 9HH134 189 Wyatt with new pcb SATA 8MB LF F W 0001SDM1 60001922 TOSHIBA DIGI N500GB5 4KS HDD TOSHIBA 2 5 5...

Page 201: ...IX SO1GBIII13 Memory HYNIX SO DIMM DDRIII 1333 1GB HMT112S6TFR8C H9 LF 128 8 0 055um 60002215 SAMSUNG SO1GBIII13_BR Memory SAMSUNG SO DIMM DDRIII 1333 1GB M471B2873FHS CH9 LF 128 8 46nm Brazil 6000204...

Page 202: ...D 7585H LF W O bezel SATA HF Windows 7 10001070 PHILIPS NSM8XS ODD PLDS Super Multi DRIVE 12 7mm Tray DL 8X DS 8A4SH LF W O bezel SATA HF Windows 7 60001922 TOSHIBA DIGI NSM8XS_BR ODD TOSHIBA Super Mu...

Page 203: ...BRM 2070 T77H114 01 BT 3 0 Camera 10001044 CHICONY 1 3M Chicony 1 3M CH9665SN CNF9157 PLM00012 Suyin 1 3M Suyin 1 3M SY9665SN 10001023 LITE ON 1 3M Liteon 1 3M LT9665AL 09P2SF119 10001023 LITE ON 1 3...

Page 204: ...194 Appendix B 23707801 FOXCONN TW 3rd WiFi BG Foxconn Wireless LAN Broadcom 4312H BG HM 23707801 FOXCONN TW 3rd WiFi BG Foxconn Wirelss LAN Atheros HB95BG HM T77H121 10 Vendor Type Description...

Page 205: ...nload information on all of Acer s Notebook Desktop and Server models including Service guides for all models User s manuals Bios updates Software utilities Spare parts lists TABs Technical Announceme...

Page 206: ...196 Appendix C...

Page 207: ...138 computer on indicator 9 CPU Removing 83 Replacing 109 D DIMM Modules Replacing 130 Display 5 display hotkeys 13 E EasyTouch Failure 148 External Module Disassembly Flowchart 46 F Features 1 Flash...

Page 208: ...33 Optical Drive Module Removing 49 P Panel 6 Bottom 9 PC Card 9 Power On Failure 138 R Replacing 121 123 Right Speaker Module Removing 67 Replacing 121 S SD Dummy Card Removing 48 Replacing 134 Speak...

Page 209: ...199 Removing 61 Replacing 124 utility BIOS 25 33 W Windows 2000 Environment Test 188 Wireless Function Failure 148 WLAN Module Removing 54 Replacing 129...

Page 210: ...200...

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