HP vc4820T - Thin Client Troubleshooting Manual Download Page 44

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Troubleshooting Flowcharts

Initial Troubleshooting

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loading?

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t5000 Troubleshooting

Flow Chart

Yes

Beeps,

LEDs,

or error

Yes

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Error Messages

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No OS Loading

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Start Intial Troubleshooting

Chapter 4 Diagnostics and Troubleshooting

Summary of Contents for vc4820T - Thin Client

Page 1: ...Troubleshooting Guide HP vc4820T and vc4825T Thin Clients ...

Page 2: ...accompanying such products and services Nothing herein should be construed as constituting an additional warranty HP shall not be liable for technical or editorial errors or omissions contained herein This document contains proprietary information that is protected by copyright No part of this document may be photocopied reproduced or translated to another language without the prior written consen...

Page 3: ...ollow directions could result in bodily harm or loss of life CAUTION Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of information NOTE Text set off in this manner provides important supplemental information iii ...

Page 4: ...iv About This Book ...

Page 5: ...and Replacing the Side Access Panel and Metal Side Cover 11 Removing the Side Access Panel and Metal Side Cover 11 Replacing the Metal Side Cover and Side Access Panel 12 Installing Thin Client Options 13 Installing the USB Device 13 Removing and Replacing the Battery 14 External Drives 15 Configuring Powered Serial Ports 16 3 BIOS Settings F10 Utility Using the BIOS Settings 25 Changing BIOS Sett...

Page 6: ...1 41 No Video Part 2 42 No Video Part 3 43 No Video Part 4 44 Error Messages 45 NO OS Loading 46 OS Not Loading from Flash 47 Non Functioning Pointing Device or Keyboard 48 No Internal Network Connection 49 No Audio 50 No IP Address 51 Booting in Continuous Loop 52 5 Restoring the Flash Image System Requirements 53 Getting Started 53 Creating an ISO Image 54 Formatting a USB Flash Drive 54 Unpacki...

Page 7: ... Bootable Disk to Map Drives 59 For More Information 59 Appendix C FTP Update Server Requirements 60 DCHP Server 60 FTP Server 60 Description 61 Host Settings 61 Select Image to Update 62 Appendix D System BIOS Restoring a Corrupt BIOS 64 Updating a BIOS 65 Appendix E Electrostatic Discharge Preventing Electrostatic Damage 66 Grounding Methods 66 Appendix F Specifications Index 69 vii ...

Page 8: ...viii ...

Page 9: ...stem The vt4825T Linux thin clients offer an extensible Linux image built upon Debian Product features For more information refer to the model specific QuickSpecs at http h18004 www1 hp com products quickspecs QuickSpecs_Archives QuickSpecs_Archives html Serial Number Location Every thin client includes a unique serial number located as shown in the following illustration Have this number availabl...

Page 10: ...lient model to find the model specific QuickSpecs Figure 1 2 Front panel components 1 Secure USB compartment 5 Power LED 2 Power button 6 Line out headphone audio connector 3 Flash activity LED 7 Universal serial bus USB connectors 2 4 Line in microphone connector 2 Chapter 1 Product Description ...

Page 11: ...d the model specific QuickSpecs The secure USB compartment allows you to use two USB devices in a secured location Figure 1 3 Top components external view 1 Secure USB compartment 2 Cable lock slot Figure 1 4 Top components internal view 1 Secure USB compartment ports 2 2 Cable lock slot Product features 3 ...

Page 12: ... connector 8 Power connector Installing the Rubber Feet You may want to use your thin client in a horizontal orientation You can install rubber feet on the left side of the unit to help keep the unit safely in place To install the rubber feet 1 Locate the VESA Video Electronics Standards Association holes in the left side of the thin client CAUTION If you use the thin client in a horizontal orient...

Page 13: ...of the unit into which the tabs on the stand fit Position the stand with the wide part toward the front of the unit Align the tabs on the widest part of the stand with the slots approximately 7 6 cm 3 inches from the front of the unit and the tabs on the narrower part with the slots approximately 3 8 cm 1 5 inches from the rear of the unit 3 Insert the tabs into the slots 1 and slide the stand tow...

Page 14: ...Removing the Stand To remove the stand 1 Turn unit upside down 2 Lift the tab 1 and then pull the stand up to remove it from the unit 2 Figure 1 8 Removing the stand 6 Chapter 1 Product Description ...

Page 15: ... thin clients HP Client Automation is an industry leading device management product which is part of a bigger Business Service Automation environment management solution With HP Client Automation you can manage simple thin client deployments or highly complex IT environments that contain a combination of thin clients PCs blades servers and other common computer based resources HP Client Automation...

Page 16: ...hone connectors into the network interface controller NIC receptacles CAUTION Static electricity can damage the electronic components of the thin client or optional equipment Before beginning these procedures ensure that you are discharged of static electricity by briefly touching a grounded metal object See Electrostatic Discharge on page 66 for more information 3 Remove the secure USB compartmen...

Page 17: ...ure USB compartment can be locked by the optional security cable lock CAUTION The ambient temperature inside of the secure USB compartment can reach up to 55 C 131 F in worst case conditions Make sure the specifications for any device you install in the compartment indicate the device can tolerate a 55 C 131 F ambient environment NOTE In addition to following these instructions follow the detailed...

Page 18: ... the secure compartment cover 1 Place the cover on top of the unit so it is offset about 0 6 cm 1 4 inch toward the front of the unit allowing the tabs on the cover to align with the slots on the chassis 1 2 Slide the cover toward the back of the unit until the cover is flush with the back panel of the chassis 2 3 Replace the screw 3 Figure 2 2 Replacing the secure compartment cover 10 Chapter 2 H...

Page 19: ...Secure USB Compartment Cover on page 9 2 Lay the unit flat on a stable surface with the right side up and the left side down 3 Slide the access panel about 3 mm 1 8 inch toward the top of the unit 2 and then lift the access panel up and off the unit 3 Figure 2 3 Removing the side access panel To remove the metal side cover NOTE You must remove the metal side cover to access internal components suc...

Page 20: ...e chassis and lower the cover until it snaps into place 1 2 Align the screw holes of the metal side cover with the chassis holes and insert and tighten the four screws 2 Figure 2 5 Replacing the metal side cover To replace the access panel 1 Align the tabs on the access panel with the slots in the metal side cover and place the access panel on the side of the unit offset about 3 mm 1 8 inch toward...

Page 21: ...ry on page 14 Installing the USB Device Before beginning the replacement process review General Hardware Installation Sequence on page 8 for procedures you should follow before and after installing or replacing hardware Insert the USB device into the USB port in the secure USB compartment See the following illustration for the location of the ports in the secure USB compartment Figure 2 6 USB port...

Page 22: ...nd Replacing the Battery Before beginning the replacement process review General Hardware Installation Sequence on page 8 for procedures you should follow before and after installing or replacing hardware WARNING Before removing the side access panel ensure that the thin client is turned off and the power cord is disconnected from the electrical outlet To remove and replace the battery 1 Locate th...

Page 23: ...battery packs and accumulators should not be disposed of together with the general household waste In order to forward them to recycling or proper disposal please use the public collection system or return them to HP an authorized HP partner or their agents The Taiwan EPA requires dry battery manufacturing or importing firms in accordance with Article 15 or the Waste Disposal Act to indicate the r...

Page 24: ...e a powered serial port If the serial port is configured as a powered port devices that support a powered serial interface do not require an external power source Figure 2 9 Powered Serial Ports The serial port jumpers on the system board are located as shown in the following illustration Figure 2 10 Serial Port Jumper Locations on the System Board Item Jumper 1 COM2 JP1 2 COM2 JP4 16 Chapter 2 Ha...

Page 25: ...Table 2 3 Configuring Serial Port Power on page 18 to determine the appropriate pins CAUTION An unsupported configuration can cause severe equipment damage Carefully verify COM Port Jumper locations and supported configurations before you configure a serial port See Figure 2 10 Serial Port Jumper Locations on the System Board on page 16 and Table 2 3 Configuring Serial Port Power on page 18 for Ju...

Page 26: ... pin 7 RTS RTS RTS RTS pin 8 CTS RXD TXD RXD TTL TXD TTL CTS CTS pin 9 RI TXD RXD TXD TTL RXD TTL RI RI CAUTION To prevent severe equipment damage carefully verify the location of the COM Port Jumper before you configure it See Figure 2 10 Serial Port Jumper Locations on the System Board on page 16 for locations NOTE The jumpers in the following table are in the same orientation illustrated in Fig...

Page 27: ...Table 2 3 Configuring Serial Port Power continued Configuring Powered Serial Ports 19 ...

Page 28: ...Table 2 3 Configuring Serial Port Power continued 20 Chapter 2 Hardware Changes ...

Page 29: ...Table 2 3 Configuring Serial Port Power continued Configuring Powered Serial Ports 21 ...

Page 30: ...Table 2 3 Configuring Serial Port Power continued 22 Chapter 2 Hardware Changes ...

Page 31: ...Table 2 3 Configuring Serial Port Power continued Configuring Powered Serial Ports 23 ...

Page 32: ...Table 2 3 Configuring Serial Port Power continued 24 Chapter 2 Hardware Changes ...

Page 33: ...ot Up NumLock Off On F12 Boot Enabled Disabled Integrated Audio Enabled Disabled Network Controller Enabled Disabled Serial Port 1 3F8 IRQ4 other values 2F8 IRQ3 3E8 IRQ4 2E8 IRQ3 Disabled Serial Port 2 2F8 IRQ3 other values 3F8 IRQ4 3E8 IRQ4 2E8 IRQ3 Disabled Serial Port 3 3E8 IRQ5 other values 3F8 IRQ5 2F8 IRQ10 2E8 IRQ10 Disabled Serial Port 4 2E8 IRQ10 other values 3F8 IRQ5 2F8 IRQ10 3E8 IRQ5 ...

Page 34: ... keyboard then power on the thin client 3 The Setup Utility screen is divided into five menu headings and five task actions The Menu Headings are System Information Standard CMOS Features Advanced BIOS Features Integrated Peripherals Power Management Setup The Task Actions are Load Factory Defaults Set Administrative Password Set User Password Save Exit Setup Exit without Saving Use the arrow keys...

Page 35: ... only Asset Tag Enter asset tracking number Setup Utility Standard CMOS Features Table 3 3 Setup Utility Standard CMOS Features Option Description Date mm dd yy Allows you to set system date Time hh mm ss Allows you to set system time IDE Primary Master Indicates ATA Flash settings Halt On Allows you to select system response of All Errors No Errors or All But Keyboard when POST Error has been det...

Page 36: ...sable USB controller Default is enabled Advanced USB Options Enable or Disable USB external ports Default is enabled USB External Ports Default is enabled USB Keyboard Support Allows use of USB keyboard under DOS Default is enabled USB Mouse Support Allows use of USB Mouse under DOS Default is disabled Serial Port 1 Select serial port base IO port address and IRQ Default is 3F8 IRQ4 Serial Port 2 ...

Page 37: ... of Sunday through Saturday Time of Day Select the alarm RTC wakeup time of day hh mm Setup Utility Utility Task Actions Table 3 7 Setup F10 Utility Task Actions Heading Table Load Factory Defaults Select Yes or No Y N Set Administrator Password Allows you to set change and disable the administrator password Set User Password Allows you to set change and disable the user password NOTE When the use...

Page 38: ...lization NOTE If one of the tests fails the unit will simply stop but the LED will stay on If the video test fails the unit beeps There are no messages sent to video for any of these failed tests NOTE After the video is initialized anything that fails will have an error message NOTE RJ 45 LEDs are located inside the RJ 45 connector on the top rear panel of the thin client The LEDs are visible when...

Page 39: ...ality and configuration If a diagnostic test fails during hardware initialization the unit simply stops There are no messages sent to video NOTE You may try to restart the unit and run through the diagnostic tests a second time to confirm the first shutdown The following table lists the tests that are performed on t5000 units Table 4 2 Power On Diagnostic Test Test Description Boot Block Checksum ...

Page 40: ...mory test The user may press Esc to skip the full memory test Hard Disk Install Failure Cannot find or initialize the hard drive controller or the drive Make sure the controller is installed correctly If no hard drives are installed be sure the Hard Drive selection in Setup is set to NONE Keyboard error or no keyboard present Cannot initialize the keyboard Make sure the keyboard is attached correc...

Page 41: ...g the System Administrator ping the unit from the server If the thin client pings back then the signal was accepted and the unit is working This indicates a configuration issue If the thin client does not ping back and the thin client does not connect to the server re image the unit No link or activity on the network RJ 45 LEDs or the LEDs do not illuminate blinking green after powering on the thi...

Page 42: ... priority sequence is USB device PXE To troubleshoot the unit 1 When the unit boots the monitor should display the following information Table 4 5 Diskless Unit Troubleshooting Item Information Action MAC Address NIC portion of the system board is OK If no MAC Address the system board is at fault Contact the Call Center for service GUID General system board information If no GUID information the s...

Page 43: ...s not configured to PXE If you missed the F12 cue the system will try to boot to the ATA flash that is not present The message on the screen will read ERROR Non system disk or disk error Replace and press any key when ready Pressing any key will restart the boot cycle 3 If you are running in a Linux environment an error message will appear on the screen if there is no Client IP ERROR Non system di...

Page 44: ...o to No Power Is the OS loading Go to next page t5000 Troubleshooting Flow Chart B Yes No Beeps LEDs or error Yes No Go to No Video Go to Error Messages Go to No OS Loading Yes Is there video Yes No Start Intial Troubleshooting 36 Chapter 4 Diagnostics and Troubleshooting ...

Page 45: ...ing Go to Non functioning pointing device or keyboard Windows desktop displayed but can t connect Yes No Audio working Yes No Go to No internal network connector Go to No audio Go to No IP address Yes NIC working Yes No Boot in continuous loop Go to Booting in continuous loop Troubleshooting 37 ...

Page 46: ... system No Restart thin client and return to start of this chart No Using power strip or UPS Yes Turn off power and disconnect power cord Go to next page t5000 Troubleshooting Flow Chart No Power Part 2 No Power Power LED is off Ensure power strip or UPS is turned on Yes Turn computer off Plug power cord into different active wall outlet No 38 Chapter 4 Diagnostics and Troubleshooting ...

Page 47: ...wer LED on Power outlet active Done Yes Go to next page t5000 Troubleshooting Flow Chart No Power Part 3 Plug directly into AC outlet Try different outlet No Reseat AC adapter in thin client and at power source Power on Done Yes No No Yes Troubleshooting 39 ...

Page 48: ...one Yes Done Replace power cord No Replace the power brick Is the power brick light No Yes Call your local HP Call Center for a diagnosis To locate a local phone number visit the HP Web site at http www hp com cgi bin hpsupport index pl 40 Chapter 4 Diagnostics and Troubleshooting ...

Page 49: ...ge t5000 Troubleshooting Flow Chart No Video Part 2 Monitor LED on No Note Older monitors and some third party monitors do not support the amber LED Go to No Video Part 2 Plug in turn on and return Initial Troubleshooting Contrast and brightness turned up Video adapter connected note 2 Yes Green No Yes Amber Yes Troubleshooting 41 ...

Page 50: ...ubleshooting Flow Chart No Video Part 2 Note 3 Turn off and unplug thin client before reconnecting cables Video OK Replace monitor Done Plug in and turn on monitor Video OK Done Does unit have added memory upgrades Have the unit serviced NOTE Refer to the Warranty for coverage information Yes No Yes No No No Yes 42 Chapter 4 Diagnostics and Troubleshooting ...

Page 51: ...eginning disassembly procedures Turn off power disconnect power cord and open the computer Video OK computer starts Done Replace cover and power cord then restart computer Turn off the computer and disconnect power Replace components in system one at a time starting with Flash Test system after each replacement for video or beeps Yes No Yes Reseat flash then clear CMOS by removing and replacing th...

Page 52: ...d from the power source or the unit before beginning disassembly procedures Restart computer See codes or beeps Turn off the computer and disconnect power Replace components in system one at a time starting with Flash Test system after each replacement for video or beeps No Integrated video Yes Have the unit serviced Note Refer to the Warranty for coverage information Yes 44 Chapter 4 Diagnostics ...

Page 53: ... error messages Notes Short S and long L beeps will only be heard if the system has a speaker LEDs will only function on PS 2 keyboards not USB Power LED has no color showing Computer is off Power LED glows green Computer is on Beep code 1 Long 2 Short Video controller not present or incorrectly initialized Ensure the monitor is plugged in Beep code 1 Long 3 Short ROM failure Create ROMPaq diskett...

Page 54: ...riority 1 USB device 2 Flash 3 Network OS not loading from Note If USB diskette drive present and diskette installed system will not boot from other USB device Flash Go to OS Not Loading from Flash Network Go to No Internal Network Connection 46 Chapter 4 Diagnostics and Troubleshooting ...

Page 55: ...ormation Restore image using the Recovery process Done Done Boot from Flash Boot from Flash Using t5000 F10 Setup change boot priority to factory defaults 1 USB Device 2 Flash 3 Network Check Amount of Flash memory in system information table Disconnect any USB diskette drive or USB CD ROM drive Press Ctrl Alt Del to reboot Yes No Yes No Troubleshooting 47 ...

Page 56: ...a known working keyboard mouse to the system Keyboard or mouse working Working Pointing device or keyboard not operating properly F10 Setup to enable USB controller Press Ctrl Alt Del to reboot Done Yes No Done Yes No Reseat keyboard or mouse and disconnect other devices Reimage device using the recovery process Working Done Yes Press Ctrl Alt Del to reboot No 48 Chapter 4 Diagnostics and Troubles...

Page 57: ... active jack Replace cable or have jack activated Keyboard or mouse working Done Yes No Call your local HP Call Center for a diagnosis To locate a local phone number visit the HP Web site at http www hp com cgi bin hpsupport index pl OK Reimage using recovery process NIC configured in OS No Yes No Troubleshooting 49 ...

Page 58: ...estore image using the Recovery process Done N Is Volume Control or Media Player muted If so change the setting Are speaker connectors in correct jacks Try both audio jacks In Control Panel s Sound and Audio does the Audio tab indicate whether the unit sees its audio hardware Yes Audio Disconnect any external speakers Audio Audio Yes Done N Yes N N Yes N 50 Chapter 4 Diagnostics and Troubleshootin...

Page 59: ...d Reimage device using restore Done Service the unit Note Refer to the Warranty for coverage information Ping Loopback OK Reboot unit and server N Yes N Yes N Thin client have a valid IP address Done Ping Gateway OK Ping Server by name OK Thin client have a valid IP address N N Yes Done Yes Yes Troubleshooting 51 ...

Page 60: ... Boot OK Using t5000 F10 Setup change boot priority to factory defaults 1 USB Device 2 Flash 3 Network Check Amount of Flash memory in system information table Reboot the thin client If you are using XPe OS disable the write filter Chek that Altiris 5 6 Deployment server is being used Reboot the thin client Yes Yes No t5000 Troubleshooting Flow Chart End 52 Chapter 4 Diagnostics and Troubleshootin...

Page 61: ...P Compaq Thin Client Imaging Tool USB CD ROM drive for thin client if using the ISO Image option Before using the utility you must download the appropriate image from http www hp com sbso bussupport html Getting Started There are three deployment options supported by this utility You can choose to do one or more of the following using your personal computer Generate an ISO image to use with CD cre...

Page 62: ...N click Y to begin the image restore process on the thin client Formatting a USB Flash Drive CAUTION To prevent loss of data be sure that you have saved any user created data from the USB drive to another drive 1 Connect your USB flash drive to your computer Ensure that only one USB flash drive is connected to the system 2 Click USB Format 3 Select the USB drive from the list using the up and down...

Page 63: ...ile other operating system images use FLASH IMG Deploying with PXE 1 Ensure that IBR exe and Flash img are stored in the same directory on the server 2 Add full path IBR exe y full path Flash img hd0 to the PXE command file and then run it To view the IBR command line options At the command prompt type IBR EXE and press Enter Refer to Configuring a PXE Server on page 57 for instructions about sett...

Page 64: ...ick the name of the new job 6 Near the upper right side of the screen click Add 7 Select Run Script from the menu 8 Type full path images ibr exe y images flash xx hd0 NOTE Linux uses the file name FLASH DD while other operating system images use FLASH IMG 9 Under In which OS would you like to run this script click DOS 10 Click Finish 11 You can now drag and drop the job onto the appropriate machi...

Page 65: ...1 From the Windows 2000 Server log on to the domain using an account that has Administrator privileges on the server 2 From the Windows Control Panel double click on Add Remove Programs 3 Double click Add Remove Windows Components 4 Select Remote Installation Services and then click Next Insert Windows 2000 Server CD into the CD ROM drive if prompted 5 Restart the computer after the wizard has fin...

Page 66: ...ROM drive and enter the path to the CD ROM drive usually drive D or E 7 Click Next 8 Click Next 9 Click Next 10 When the installation is complete click Finish Set User Permissions on the Active Directory Server On the active directory server 1 Click Start Programs Administrative Tools 2 Click Active Directory Users and Computers 3 Right click on the appropriate domain name 4 Click Delegate Control...

Page 67: ...k boot disk to map drives Refer to the Microsoft Web site for instructions about creating a network bootable diskette For More Information HP Compaq t5000 Series Documentation including white papers discussing software deployment methods http welcome hp com country us en support html Type your model number into the for product box and navigate to the Manuals link Altiris Deployment Solution Docume...

Page 68: ...tage of all the features provided in the latest image HP recommends at least 1 GB of flash 1 GB of RAM Server Requirements DCHP Server Option 137 should contain a string value specifying an FTP share where the WES images and WinPE image are stored For example if the WES images and WinPE image are stored in ftp ftpserver ftpfolder then the option DHCP option 137 should contain the following string ...

Page 69: ...ssword boxes If the FTP share allows anonymous read access then you can leave the User ID and Password boxes empty If the WES images and WinPE image are stored in the default root folder on the FTP server then you can leave the Path box empty or fill the box with 2 Automatically through a DHCP option by selecting the Get Host Settings from DHCP server check box These host settings can be saved and...

Page 70: ...mation dialog similar to the following is displayed Click No to abort the operation If you click Yes the HP FTP Image Update Client confirms that the flash drive has at least 200MB free to host the WinPE image If the flash drive does not the following error message is displayed If the flash device has enough memory the update client starts the download of the WinPE image modifies the boot loader t...

Page 71: ...Select Image to Update 63 ...

Page 72: ...an also perform a BIOS recovery using a USB flash drive From the BIOS softpaq DOS Flash directory add Autoexec bat flash bat Awdflash exe and BIN file on the flash drive or floppy diskette boot to it and then the Autoexec bat will run Flash bat 2 Select Software Driver Downloads 3 In the For Product box type the thin client model number and then click the arrow 4 Under Select Operating System sele...

Page 73: ...ally or with a Preboot eXecution Environment PXE management application to update the system BIOS WFlash Windows based utility used to locally update the system BIOS on individual PCs through the Windows environment CEFlash CE net based utility to locally update the system BIOS on individual PCs through the CE net environment LFlash Linux based utility to locally update the system BIOS on individu...

Page 74: ...There are several methods for grounding Use one or more of the following methods when handling or installing electrostatic sensitive parts Use a wrist strap connected by a ground cord to a grounded Thin Client chassis Wrist straps are flexible straps of 1 megohm 10 percent resistance in the ground cords To provide proper grounding wear the strap snug against the skin Use heelstraps toestraps or bo...

Page 75: ...of 1 C 300 m 1 8 F 1000 ft to a maximum of 3 Km 10 000 ft with no direct sustained sunlight Upper limit may be limited by the type and number of options installed The operating temperature range when the thin client is attached to a flat panel using the HP Quick Release is 50 to 95 F 10 to 35 C Relative Humidity non condensing Operating max wet bulb temperature is 28 C or 84 2 F Nonoperating max w...

Page 76: ... Line Frequency 100 240 VAC 50 60 Hz 100 240 VAC 50 60 Hz Power Output maximum 50 W 50 W Rated Output Current maximum 4 16 A 4 16 A Output Voltage 12 V DC 12 V DC Table F 1 HP vc4820T vc4825T Thin Clients continued 68 Appendix F Specifications ...

Page 77: ...Flash activity LED location 2 formatting a flash drive 54 front panel components 2 G grounding methods 66 H hard drive 15 hardware drivers 9 hardware specifications 67 hardware upgrades 8 headphone connector location 2 horizontal orientation 4 HP Client Automation 7 HP Device Manager 7 HP ThinState Tools 7 humidity specifications 67 I image restore tool 56 installation sequence 8 installing extern...

Page 78: ...vices 13 serial connector location 4 serial connectors 16 serial number location 1 setting user permissions on the Active Directory Server 58 Setup Utility Advanced BIOS Features 27 Integrated Peripherals 28 Main Menu 26 Power Management Setup 29 Standard CMOS features 27 System Information 27 Utility Task Actions 29 shutting down 8 side access panel removing 11 replacing 12 side cover removing 11...

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