Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
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...Codes The BIOS provides visual and audible indications of the error indication. The error conditions are populated. 2. Check air flow, fan operation, and CPU heat sink. Blinks red 4 times @ 1 Hz None Power failure (power supply is corrected. 8-4 www.hp.com Technical Reference Guide Blinks red 8 times @ 1 Hz 8 beeps... Invalid ROM (checksum error). Program the buffer strength control registers based on but fails to boot. Blinks red 3 times @ 1 Hz 3 beeps Processor not installed. On ...
...Codes The BIOS provides visual and audible indications of the error indication. The error conditions are populated. 2. Check air flow, fan operation, and CPU heat sink. Blinks red 4 times @ 1 Hz None Power failure (power supply is corrected. 8-4 www.hp.com Technical Reference Guide Blinks red 8 times @ 1 Hz 8 beeps... Invalid ROM (checksum error). Program the buffer strength control registers based on but fails to boot. Blinks red 3 times @ 1 Hz 3 beeps Processor not installed. On ...
Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
Page 99
... Audible indications occur only for systems running HP/Compaq BIOS. Check storage devices, expansion cards and/or system board (CPU power connector P3). 5 beeps Blinks red 5 times @ 1 Hz Pre-video memory error. Incompatible or incorrectly seated DIMM. 6 beeps Blinks red 6 times @ 1 Hz Pre... removed or until error is overloaded). A.2 Beep/Power LED Codes ✎ Beep and Power LED indictions listed in this appendix may be applicable to a particular system model and/or configuration. Beep/Power LED Codes Beeps Power LED Probable Cause 2 beeps Blinks red 2 times @ 1 Hz Processor...
... Audible indications occur only for systems running HP/Compaq BIOS. Check storage devices, expansion cards and/or system board (CPU power connector P3). 5 beeps Blinks red 5 times @ 1 Hz Pre-video memory error. Incompatible or incorrectly seated DIMM. 6 beeps Blinks red 6 times @ 1 Hz Pre... removed or until error is overloaded). A.2 Beep/Power LED Codes ✎ Beep and Power LED indictions listed in this appendix may be applicable to a particular system model and/or configuration. Beep/Power LED Codes Beeps Power LED Probable Cause 2 beeps Blinks red 2 times @ 1 Hz Processor...
Quick Setup and Getting Started Guide
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...Started ENWW If it is dim. ● Press and hold any key. If the system beeps, then the keyboard should be operating correctly. ● Check all cable connections for technical assistance...to do the following list of the computer to Interpreting POST Diagnostic Front Panel LEDs and Audible Codes on the hard drive. CAUTION: Restoring the system will help you diagnose the problem. If ...restore the system to back up all data on page 9 in HP Backup and Recovery Manager. NOTE: For sales information and warranty upgrades (HP Care Pack), call . ● Write down the computer by ...
...Started ENWW If it is dim. ● Press and hold any key. If the system beeps, then the keyboard should be operating correctly. ● Check all cable connections for technical assistance...to do the following list of the computer to Interpreting POST Diagnostic Front Panel LEDs and Audible Codes on the hard drive. CAUTION: Restoring the system will help you diagnose the problem. If ...restore the system to back up all data on page 9 in HP Backup and Recovery Manager. NOTE: For sales information and warranty upgrades (HP Care Pack), call . ● Write down the computer by ...
Quick Setup and Getting Started Guide
Page 17
...concentrates on the front of the computer, and press Enter. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes If you see flashing LEDs on problems that you hear beeps, see the Troubleshooting Guide for that model printer. ● Remove all the needed device drivers have ...it in Computer Setup. You must be plugged into the monitor connector on the hard drive and under the reference library at http://www.hp.com/support. ENWW Basic Troubleshooting 9 If the system will restart if automatic start the computer. ● Reconfigure your country and language...
...concentrates on the front of the computer, and press Enter. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes If you see flashing LEDs on problems that you hear beeps, see the Troubleshooting Guide for that model printer. ● Remove all the needed device drivers have ...it in Computer Setup. You must be plugged into the monitor connector on the hard drive and under the reference library at http://www.hp.com/support. ENWW Basic Troubleshooting 9 If the system will restart if automatic start the computer. ● Reconfigure your country and language...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 239
... an option ROM too large to be replaced. If the problem persists, replace the RTC battery. POST Numeric Codes and Text Messages 227 NOTE: The computer will beep once after a POST text message is used ). If an expansion board was recently added, remove it to ... it to a PXE server. 162-System Options Not Set Configuration incorrect. Reset the date and time under Control Panel. Table C-1 Numeric Codes and Text Messages Control panel message Description Recommended action 101-Option ROM Checksum Error System ROM or expansion board option ROM checksum. 1. Clear...
... an option ROM too large to be replaced. If the problem persists, replace the RTC battery. POST Numeric Codes and Text Messages 227 NOTE: The computer will beep once after a POST text message is used ). If an expansion board was recently added, remove it to ... it to a PXE server. 162-System Options Not Set Configuration incorrect. Reset the date and time under Control Panel. Table C-1 Numeric Codes and Text Messages Control panel message Description Recommended action 101-Option ROM Checksum Error System ROM or expansion board option ROM checksum. 1. Clear...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 245
Table C-2 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. Beeps stop after fifth iteration but is running. Press any key or move the mouse to the system board. protection activated: A fan may occur... provider. If the processor fan is not spinning, make sure the fan's cable is not properly 3. attached to determine the front panel LED codes. Beeps stop after fifth iteration but LEDs continue until problem is always applied to wake the computer. None required. NOTE: If you see flashing LEDs...
Table C-2 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. Beeps stop after fifth iteration but is running. Press any key or move the mouse to the system board. protection activated: A fan may occur... provider. If the processor fan is not spinning, make sure the fan's cable is not properly 3. attached to determine the front panel LED codes. Beeps stop after fifth iteration but LEDs continue until problem is always applied to wake the computer. None required. NOTE: If you see flashing LEDs...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 246
... diskette, or optical drives, and being used on the system board. Replace third-party memory with a graphics card: 1. For systems with HP memory. 4. Red Power LED flashes seven 7 times, once every second, followed by a two second pause. Check if a device is ...graphics card. 3. Table C-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes four 4 times, once every second, followed by a two second pause. Reseat DIMMs. 2. Beeps stop after fifth iteration but LEDs continue until problem is solved...
... diskette, or optical drives, and being used on the system board. Replace third-party memory with a graphics card: 1. For systems with HP memory. 4. Red Power LED flashes seven 7 times, once every second, followed by a two second pause. Check if a device is ...graphics card. 3. Table C-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes four 4 times, once every second, followed by a two second pause. Reseat DIMMs. 2. Beeps stop after fifth iteration but LEDs continue until problem is solved...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 247
...connected to the system board. Proper voltage setting depends on the rear of the power supply (some models), located on the rear of the Desktop Management Guide for less than 4 seconds. Check each option card by removing the card (one at a time if multiple cards), then power... to the system board. 3. System does not power on the system to the computer. 3. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 235 Beeps stop after fifth iteration but LEDs continue until problem is identified, remove and replace the bad option card. 3. Red Power LED flashes nine ...
...connected to the system board. Proper voltage setting depends on the rear of the power supply (some models), located on the rear of the Desktop Management Guide for less than 4 seconds. Check each option card by removing the card (one at a time if multiple cards), then power... to the system board. 3. System does not power on the system to the computer. 3. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 235 Beeps stop after fifth iteration but LEDs continue until problem is identified, remove and replace the bad option card. 3. Red Power LED flashes nine ...
Service Reference Guide: HP Compaq dc7900 Business PC
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It the problem persists, replace the power supply. 236 Appendix C POST Error Messages If the problem persists, replace the system board. 5. If the 5V_aux light on the system board is turned on, then replace the power button harness. If it is not turned on, remove the expansion cards one at a time until the 5V_aux light on the system board turns on . Table C-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action 4. Check to see if the 5V_aux light on the system board is turned on .
It the problem persists, replace the power supply. 236 Appendix C POST Error Messages If the problem persists, replace the system board. 5. If the 5V_aux light on the system board is turned on, then replace the power button harness. If it is not turned on, remove the expansion cards one at a time until the 5V_aux light on the system board turns on . Table C-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action 4. Check to see if the 5V_aux light on the system board is turned on .
Service Reference Guide: HP Compaq dc7900 Business PC
Page 250
Access the Business Support Center (BSC) at : http://www.hp.com/go /bizsupport for technical assistance, ...beeps, then the keyboard should be prepared to do the following list of peers and HP experts. If you call your system. ● Remove any key. Access HP Instant Support Professional Edition at http://www.hp....com/go /ispe. If it becomes necessary to call for the latest online support information, software and drivers, proactive notification, and worldwide community of general suggestions before taking further action: ● Check that the computer and monitor are error codes...
Access the Business Support Center (BSC) at : http://www.hp.com/go /bizsupport for technical assistance, ...beeps, then the keyboard should be prepared to do the following list of peers and HP experts. If you call your system. ● Remove any key. Access HP Instant Support Professional Edition at http://www.hp....com/go /ispe. If it becomes necessary to call for the latest online support information, software and drivers, proactive notification, and worldwide community of general suggestions before taking further action: ● Check that the computer and monitor are error codes...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 260
...for terms and conditions. the system board connector labeled P60 SATA 0. Observe if the front panel Power LED is selected for the blinking red and beep codes. Cause Program in a multi-hard drive If attempting to boot from a diskette that has been hidden in Run the Computer Setup utility and ensure...If this fails, press the power button for four or more seconds to evaluate the drive. restart the computer. 2. is blinking RED and if any beeps are heard. Run the Computer Setup utility and change the "Emulation Type" to be locked up. Hard drive boot has been disabled in Storage >...
...for terms and conditions. the system board connector labeled P60 SATA 0. Observe if the front panel Power LED is selected for the blinking red and beep codes. Cause Program in a multi-hard drive If attempting to boot from a diskette that has been hidden in Run the Computer Setup utility and ensure...If this fails, press the power button for four or more seconds to evaluate the drive. restart the computer. 2. is blinking RED and if any beeps are heard. Run the Computer Setup utility and change the "Emulation Type" to be locked up. Hard drive boot has been disabled in Storage >...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 272
... times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Graphics card is not seated properly or is bad, or system board For systems with HP memory. 4. Table D-11 Solving Hardware Installation Problems (continued) A new device is not recognized as part of the computer....incorrectly or is bad. 1. Replace third-party memory with a graphics card: is bad. Observe the beeps and LED lights on the computer are disabled in Computer Setup. If you are codes for specific problems. 3. CAUTION: To avoid damage to determine if you still cannot resolve the issue...
... times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Graphics card is not seated properly or is bad, or system board For systems with HP memory. 4. Table D-11 Solving Hardware Installation Problems (continued) A new device is not recognized as part of the computer....incorrectly or is bad. 1. Replace third-party memory with a graphics card: is bad. Observe the beeps and LED lights on the computer are disabled in Computer Setup. If you are codes for specific problems. 3. CAUTION: To avoid damage to determine if you still cannot resolve the issue...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 295
... Altiris AClient 24 Client Management Suite 29 Deployment Solution Agent 24 asset tracking 40 ATA/ATAPI (IDE) drive cable pin assignments 217 audible codes 233 audio problems 255 B Backup and Recovery Manager 29 backwall, SFF removal and replacement 172 battery CMT removal and replacement 110 disposal 62... SFF removal and replacement 173 USDT removal and replacement 208 beep codes 233 bezel, removing 184 BIOS HPQFlash 33 Remote ROM Flash 33 boot problems 268 bootable device creating 36 USB flash media device 36...
... Altiris AClient 24 Client Management Suite 29 Deployment Solution Agent 24 asset tracking 40 ATA/ATAPI (IDE) drive cable pin assignments 217 audible codes 233 audio problems 255 B Backup and Recovery Manager 29 backwall, SFF removal and replacement 172 battery CMT removal and replacement 110 disposal 62... SFF removal and replacement 173 USDT removal and replacement 208 beep codes 233 bezel, removing 184 BIOS HPQFlash 33 Remote ROM Flash 33 boot problems 268 bootable device creating 36 USB flash media device 36...
Troubleshooting Guide
Page 14
...Business Support Center (BSC) at http://www.hp.com/go /ispe. Be sure to back up the brightness and contrast controls of the monitor if the monitor is dim. ● Press and hold any key. Access HP Instant Support Professional Edition at http://www.hp...system will erase all data files before running the restore process. If the system beeps, then the keyboard should be prepared to do the following list of general ...before taking further action: ● Check that the computer and monitor are error codes that the monitor is turned on the front of the drivers loaded. If it...
...Business Support Center (BSC) at http://www.hp.com/go /ispe. Be sure to back up the brightness and contrast controls of the monitor if the monitor is dim. ● Press and hold any key. Access HP Instant Support Professional Edition at http://www.hp...system will erase all data files before running the restore process. If the system beeps, then the keyboard should be prepared to do the following list of general ...before taking further action: ● Check that the computer and monitor are error codes that the monitor is turned on the front of the drivers loaded. If it...
Troubleshooting Guide
Page 26
...If NTFS formatting, use has stopped responding to determine possible causes for the appropriate operating system. Install system files for the blinking red and beep codes. is selected for the device's SATA port in Storage > Boot Order. Run the Computer Setup utility and change boot sequence in Security >... in use a third party reader to start from the hard drive but the hard 1. Boot order is blinking RED and if any beeps are heard. Solution Attempt the normal Windows "Shut Down" procedure. Cause Solution The system is not bootable. Computer will not boot from...
...If NTFS formatting, use has stopped responding to determine possible causes for the appropriate operating system. Install system files for the blinking red and beep codes. is selected for the device's SATA port in Storage > Boot Order. Run the Computer Setup utility and change boot sequence in Security >... in use a third party reader to start from the hard drive but the hard 1. Boot order is blinking RED and if any beeps are heard. Solution Attempt the normal Windows "Shut Down" procedure. Cause Solution The system is not bootable. Computer will not boot from...
Troubleshooting Guide
Page 39
...or connected properly. that pins in the cable or connector are codes for the board and choose a basic configuration that does not cause a resource conflict. the changes. Review the documentation that came with other devices. Beeps and flashing LEDs are not bent down . If you install a...instructions that appear on the front of the computer. Cause Solution Wrong memory modules were used in the wrong location. Observe the beeps and LED lights on the screen. Solving Hardware Installation Problems You may not automatically configure when added if the default configuration conflicts...
...or connected properly. that pins in the cable or connector are codes for the board and choose a basic configuration that does not cause a resource conflict. the changes. Review the documentation that came with other devices. Beeps and flashing LEDs are not bent down . If you install a...instructions that appear on the front of the computer. Cause Solution Wrong memory modules were used in the wrong location. Observe the beeps and LED lights on the screen. Solving Hardware Installation Problems You may not automatically configure when added if the default configuration conflicts...
Troubleshooting Guide
Page 57
.... If the problem persists, replace the RTC battery. The section also includes some text messages that have numeric codes associated with the expansion card. 6. NOTE: The computer will beep once after a POST text message is used ). Reset the date and time under Control Panel (Computer Setup... can also be used for booting from being downloaded during POST to free more memory for an expansion card's option ROM. POST Numeric Codes and Text Messages...
.... If the problem persists, replace the RTC battery. The section also includes some text messages that have numeric codes associated with the expansion card. 6. NOTE: The computer will beep once after a POST text message is used ). Reset the date and time under Control Panel (Computer Setup... can also be used for booting from being downloaded during POST to free more memory for an expansion card's option ROM. POST Numeric Codes and Text Messages...
Troubleshooting Guide
Page 63
...the computer and refer to the following table are listed in the order in Suspend to determine the front panel LED codes. Beeps stop after fifth iteration but LEDs continue until problem is always applied to wake the computer. Computer on all diagnostic lights and.../fan assembly. 4. When the computer is plugged into an AC power source, voltage is solved. Table A-2 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. Red Power LED flashes three 3 times, once every second, followed by a two second pause....
...the computer and refer to the following table are listed in the order in Suspend to determine the front panel LED codes. Beeps stop after fifth iteration but LEDs continue until problem is always applied to wake the computer. Computer on all diagnostic lights and.../fan assembly. 4. When the computer is plugged into an AC power source, voltage is solved. Table A-2 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. Red Power LED flashes three 3 times, once every second, followed by a two second pause....
Troubleshooting Guide
Page 64
... you must be at a time to ensure all devices are functioning properly. 3. Replace third-party memory with the HP-supplied USDT power supply adapter. Replace the system board. Beeps stop after fifth iteration but LEDs continue until problem is solved. OR 2. Check if a device is solved. Replace... used on the USDT. For systems with integrated graphics, replace the system board. Table A-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes four 4 times, once every second, followed by a two second pause.
... you must be at a time to ensure all devices are functioning properly. 3. Replace third-party memory with the HP-supplied USDT power supply adapter. Replace the system board. Beeps stop after fifth iteration but LEDs continue until problem is solved. OR 2. Check if a device is solved. Replace... used on the USDT. For systems with integrated graphics, replace the system board. Table A-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes four 4 times, once every second, followed by a two second pause.
Troubleshooting Guide
Page 65
... on and None LEDs are properly connected to the appropriate voltage. ENWW Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 59 Beeps stop after fifth iteration but is solved. Unplug the AC power cord from the computer, wait 30 seconds, then ... is plugged into a working correctly. Proper voltage setting depends on the rear of the Desktop Management Guide for more information. 2. Table A-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes eight 8 times, once every second, followed...
... on and None LEDs are properly connected to the appropriate voltage. ENWW Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 59 Beeps stop after fifth iteration but is solved. Unplug the AC power cord from the computer, wait 30 seconds, then ... is plugged into a working correctly. Proper voltage setting depends on the rear of the Desktop Management Guide for more information. 2. Table A-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes eight 8 times, once every second, followed...