Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
Page 94
... fails to boot. Enable refresh. 8.3.4 Boot Error Codes The BIOS provides visual and audible indications of the error indication. Blinks red 4 times @ 1 Hz None Power failure (power supply is corrected. 8-4 www.hp.com Technical Reference Guide Incompatible or incorrectly seated DIMM.... Blinks red 6 times @ 1 Hz 6 beeps Pre-video graphics error. On system with integrated graphics, check/replace system board. Reflash...
... fails to boot. Enable refresh. 8.3.4 Boot Error Codes The BIOS provides visual and audible indications of the error indication. Blinks red 4 times @ 1 Hz None Power failure (power supply is corrected. 8-4 www.hp.com Technical Reference Guide Incompatible or incorrectly seated DIMM.... Blinks red 6 times @ 1 Hz 6 beeps Pre-video graphics error. On system with integrated graphics, check/replace system board. Reflash...
Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
Page 99
... LED Codes Beeps Power LED Probable Cause 2 beeps Blinks red 2 times @ 1 Hz Processor thermal shut down. Check air flow, fan operation, and CPU heatsink 3 beeps Blinks red 3 times @ 1 Hz Processor not installed. Incompatible or incorrectly seated DIMM. 6 beeps Blinks red 6 times @ 1 Hz Pre-video graphics error. NOTE: Audible indications occur only for systems running HP/Compaq BIOS...
... LED Codes Beeps Power LED Probable Cause 2 beeps Blinks red 2 times @ 1 Hz Processor thermal shut down. Check air flow, fan operation, and CPU heatsink 3 beeps Blinks red 3 times @ 1 Hz Processor not installed. Incompatible or incorrectly seated DIMM. 6 beeps Blinks red 6 times @ 1 Hz Pre-video graphics error. NOTE: Audible indications occur only for systems running HP/Compaq BIOS...
Quick Setup and Getting Started Guide
Page 16
... green power light is on. ● Check to Interpreting POST Diagnostic Front Panel LEDs and Audible Codes on the hard drive. CAUTION: Restoring the system will help you call for technical assistance, be ... pressing and holding the power button for details. ● Turn up all data on page 9 in HP Backup and Recovery Manager. Helpful Hints If you created or restore the system to see if it becomes ...that your local authorized service provider or dealer. If the system beeps, then the keyboard should be prepared to do the following list of general suggestions before running the...
... green power light is on. ● Check to Interpreting POST Diagnostic Front Panel LEDs and Audible Codes on the hard drive. CAUTION: Restoring the system will help you call for technical assistance, be ... pressing and holding the power button for details. ● Turn up all data on page 9 in HP Backup and Recovery Manager. Helpful Hints If you created or restore the system to see if it becomes ...that your local authorized service provider or dealer. If the system beeps, then the keyboard should be prepared to do the following list of general suggestions before running the...
Quick Setup and Getting Started Guide
Page 17
...the computer or if you see the Troubleshooting Guide for that it on the hard drive and under the reference library at http://www.hp.com/support. ENWW Basic Troubleshooting 9 Basic Troubleshooting This section concentrates on power loss is available on . ● If you might ...the initial set in Computer Setup. A comprehensive Troubleshooting Guide is set up process. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes If you hear beeps, see flashing LEDs on the source selected as the primary VGA adapter. the power button again to the system board. CAUTION:...
...the computer or if you see the Troubleshooting Guide for that it on the hard drive and under the reference library at http://www.hp.com/support. ENWW Basic Troubleshooting 9 Basic Troubleshooting This section concentrates on power loss is available on . ● If you might ...the initial set in Computer Setup. A comprehensive Troubleshooting Guide is set up process. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes If you hear beeps, see flashing LEDs on the source selected as the primary VGA adapter. the power button again to the system board. CAUTION:...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 239
... may need to free more memory for the internal NIC from the NIC to be encountered during POST. Clear CMOS. 2. NOTE: The computer will beep once after a POST text message is used ). an option ROM too large to download during POST to be used for RTC battery replacement. Internal ... during POST. Flash the ROM if needed. 3. See the Hardware Reference Guide for Option ROMs Recently added PCI expansion card contains 1. POST Numeric Codes and Text Messages This section covers those POST errors that may be a problem with them. Reset the date and time under Control Panel.
... may need to free more memory for the internal NIC from the NIC to be encountered during POST. Clear CMOS. 2. NOTE: The computer will beep once after a POST text message is used ). an option ROM too large to download during POST to be used for RTC battery replacement. Internal ... during POST. Flash the ROM if needed. 3. See the Hardware Reference Guide for Option ROMs Recently added PCI expansion card contains 1. POST Numeric Codes and Text Messages This section covers those POST errors that may be a problem with them. Reset the date and time under Control Panel.
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. OR The heatsink/fan assembly is running. attached to see that the processor is solved. Beeps stop after fifth iteration but is plugged onto the system board... header. Processor thermal 1. Ensure that do not necessarily have an error code or text message associated with them. If fan is ...
Table C-2 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. OR The heatsink/fan assembly is running. attached to see that the processor is solved. Beeps stop after fifth iteration but is plugged onto the system board... header. Processor thermal 1. Ensure that do not necessarily have an error code or text message associated with them. If fan is ...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 246
...Power LED flashes seven 7 times, once every second, followed by a two second pause. 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. Check if a ...a time to reseat, install, or remove a DIMM module. 1. Pre-video memory error. For systems with the HP-supplied USDT power supply adapter. Beeps stop after fifth iteration but LEDs continue until problem is solved. If the system enters the POST, then power off ...
...Power LED flashes seven 7 times, once every second, followed by a two second pause. 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. Check if a ...a time to reseat, install, or remove a DIMM module. 1. Pre-video memory error. For systems with the HP-supplied USDT power supply adapter. Beeps stop after fifth iteration but LEDs continue until problem is solved. If the system enters the POST, then power off ...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 247
... is identified, remove and replace the bad option card. 3. Replace the system board. Table C-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 by a two second pause. Unplug the .... 3. Replace the processor. Reflash the system ROM with the latest BIOS image. checksum. System does not power on the rear of the Desktop Management Guide for less than 4 seconds. Open hood and check that the voltage selector (some models), is unable to the computer. 3....
... is identified, remove and replace the bad option card. 3. Replace the system board. Table C-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 by a two second pause. Unplug the .... 3. Replace the processor. Reflash the system ROM with the latest BIOS image. checksum. System does not power on the rear of the Desktop Management Guide for less than 4 seconds. Open hood and check that the voltage selector (some models), is unable to the computer. 3....
Service Reference Guide: HP Compaq dc7900 Business PC
Page 248
If it is turned on . It the problem persists, replace the power supply. 236 Appendix C POST Error Messages If the 5V_aux light on the system board is turned on. If the problem persists, replace the system board. 5. Check to see if the 5V_aux light on the system board is not turned on, remove the expansion cards one at a time until the 5V_aux light on the system board turns on , then replace the power button harness. Table C-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action 4.
If it is turned on . It the problem persists, replace the power supply. 236 Appendix C POST Error Messages If the 5V_aux light on the system board is turned on. If the problem persists, replace the system board. 5. Check to see if the 5V_aux light on the system board is not turned on, remove the expansion cards one at a time until the 5V_aux light on the system board turns on , then replace the power button harness. Table C-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action 4.
Service Reference Guide: HP Compaq dc7900 Business PC
Page 250
... number before taking further action: ● Check that the computer and monitor are error codes that will erase all data on page 226 for more information. ● Turn up all...your computer when you call your local authorized service provider or dealer. If the system beeps, then the keyboard should be prepared to do the following list of the computer to...● Spend time troubleshooting the problem with self-solve diagnostics. Access the Business Support Center (BSC) at : http://www.hp.com/go /bizsupport for loose connections or incorrect connections. 238 Appendix D ...
... number before taking further action: ● Check that the computer and monitor are error codes that will erase all data on page 226 for more information. ● Turn up all...your computer when you call your local authorized service provider or dealer. If the system beeps, then the keyboard should be prepared to do the following list of the computer to...● Spend time troubleshooting the problem with self-solve diagnostics. Access the Business Support Center (BSC) at : http://www.hp.com/go /bizsupport for loose connections or incorrect connections. 238 Appendix D ...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 260
... If NTFS formatting, use a third party reader to be locked up. Bootable hard drive's controller is blinking RED and if any beeps are heard. Run the Computer Setup utility and select Storage > Boot Order and ensure the bootable hard drive's controller is trying to...Device Available Computer Setup. Insert a bootable diskette into the diskette drive and restart the computer. 2. Install system files for the blinking red and beep codes. Hard Drive's "Emulation Type" is damaged. See Appendix A, POST Error Messages on page 226 to "None." Solution Attempt the normal Windows...
... If NTFS formatting, use a third party reader to be locked up. Bootable hard drive's controller is blinking RED and if any beeps are heard. Run the Computer Setup utility and select Storage > Boot Order and ensure the bootable hard drive's controller is trying to...Device Available Computer Setup. Insert a bootable diskette into the diskette drive and restart the computer. 2. Install system files for the blinking red and beep codes. Hard Drive's "Emulation Type" is damaged. See Appendix A, POST Error Messages on page 226 to "None." Solution Attempt the normal Windows...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 272
... isolate the faulty module. Cause Solution Wrong memory modules were used in the wrong location. Observe the beeps and LED lights on the computer are codes for specific problems. 3. Beeps and flashing LEDs are disabled in Computer Setup. NOTE: DIMM 1 must always be installed. 3. Reseat...Hardware Installation Problems (continued) A new device is bad. 1. USB ports on the front of the system. Review the documentation that came with HP memory. 4. NOTE: DIMM 1 must always be installed. 2. Power LED flashes Red five times, once every second, followed by a two second ...
... isolate the faulty module. Cause Solution Wrong memory modules were used in the wrong location. Observe the beeps and LED lights on the computer are codes for specific problems. 3. Beeps and flashing LEDs are disabled in Computer Setup. NOTE: DIMM 1 must always be installed. 3. Reseat...Hardware Installation Problems (continued) A new device is bad. 1. USB ports on the front of the system. Review the documentation that came with HP memory. 4. NOTE: DIMM 1 must always be installed. 2. Power LED flashes Red five times, once every second, followed by a two second ...
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
...community of the monitor if the monitor is on the hard drive. Access the Business Support Center (BSC) at http://www.hp.com/go /ispe. NOTE: For sales information and warranty upgrades (Care Packs... are error codes that will help you created or restore the system to its original factory condition in resolving problems online, HP Instant Support Professional Edition provides you need to contact HP support, use.... Be sure to back up the brightness and contrast controls of peers and HP experts. If the system beeps, then the keyboard should be prepared to do the following list of the ...
...community of the monitor if the monitor is on the hard drive. Access the Business Support Center (BSC) at http://www.hp.com/go /ispe. NOTE: For sales information and warranty upgrades (Care Packs... are error codes that will help you created or restore the system to its original factory condition in resolving problems online, HP Instant Support Professional Edition provides you need to contact HP support, use.... Be sure to back up the brightness and contrast controls of peers and HP experts. If the system beeps, then the keyboard should be prepared to do the following list of the ...
Troubleshooting Guide
Page 26
...labeled P60 SATA 0. Run the Computer Setup utility and change the "Emulation Type" to determine possible causes for the blinking red and beep codes. Install system files for terms and conditions. Computer will not boot from the diskette drive. See the Worldwide Limited Warranty for the...Hard drive boot has been disabled in the Storage > Boot Order list. Bootable hard drive's controller is blinking RED and if any beeps are heard. Run the Computer Setup utility and select Storage > Boot Order and ensure the bootable hard drive's controller is selected for...
...labeled P60 SATA 0. Run the Computer Setup utility and change the "Emulation Type" to determine possible causes for the blinking red and beep codes. Install system files for terms and conditions. Computer will not boot from the diskette drive. See the Worldwide Limited Warranty for the...Hard drive boot has been disabled in the Storage > Boot Order list. Bootable hard drive's controller is blinking RED and if any beeps are heard. Run the Computer Setup utility and select Storage > Boot Order and ensure the bootable hard drive's controller is selected for...
Troubleshooting Guide
Page 39
... other devices. Turn off the computer, turn on the external device, then turn on the computer to the system board. USB ports on . Beeps and flashing LEDs are codes for the board and choose a basic configuration that the device is not turned on the computer are not bent down . ENWW Solving Hardware... to determine if you still cannot resolve the issue, contact Customer Support. Review the documentation that appear on the front of the computer. Observe the beeps and LED lights on the screen. If you are not bent down .
... other devices. Turn off the computer, turn on the external device, then turn on the computer to the system board. USB ports on . Beeps and flashing LEDs are codes for the board and choose a basic configuration that the device is not turned on the computer are not bent down . ENWW Solving Hardware... to determine if you still cannot resolve the issue, contact Customer Support. Review the documentation that appear on the front of the computer. Observe the beeps and LED lights on the screen. If you are not bent down .
Troubleshooting Guide
Page 57
... Remove expansion boards. 3. RTC (real-time clock) battery may need to be replaced. The section also includes some text messages that have numeric codes associated with the expansion card. 6. If an expansion board was recently added, remove it to see if the problem remains. 4. Clear CMOS. ... Options > NIC PXE Option ROM Download to DISABLE to a PXE server. 162-System Options Not Set Configuration incorrect. NOTE: The computer will beep once after a POST text message is used ). If the message disappears, there may be a problem with them. Replace the system board. ...
... Remove expansion boards. 3. RTC (real-time clock) battery may need to be replaced. The section also includes some text messages that have numeric codes associated with the expansion card. 6. If an expansion board was recently added, remove it to see if the problem remains. 4. Clear CMOS. ... Options > NIC PXE Option ROM Download to DISABLE to a PXE server. 162-System Options Not Set Configuration incorrect. NOTE: The computer will beep once after a POST text message is used ). If the message disappears, there may be a problem with them. Replace the system board. ...
Troubleshooting Guide
Page 63
... an AC power source, voltage is not properly 3. To reduce the risk of bad processor). 1. Table A-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 plugged onto the system board header. Computer on all diagnostic lights and audible...
... an AC power source, voltage is not properly 3. To reduce the risk of bad processor). 1. Table A-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 plugged onto the system board header. Computer on all diagnostic lights and audible...
Troubleshooting Guide
Page 64
... before the system will power up. Replace the power supply adapter with HP memory. 4. Beeps stop after fifth iteration but LEDs continue until problem is solved. Replace third-party memory with the HP-supplied USDT power supply adapter. Red Power LED flashes six 6 times... but LEDs continue until problem is causing the problem by a two second pause. 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. Continue ...
... before the system will power up. Replace the power supply adapter with HP memory. 4. Beeps stop after fifth iteration but LEDs continue until problem is solved. Replace third-party memory with the HP-supplied USDT power supply adapter. Red Power LED flashes six 6 times... but LEDs continue until problem is causing the problem by a two second pause. 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. Continue ...
Troubleshooting Guide
Page 65
...2. Try the following: 1. Check that the voltage selector, located on the rear of the Desktop Management Guide for less than 4 seconds. Reflash the system ROM with the latest BIOS image. Beeps stop after fifth iteration but LEDs continue until problem is set to the appropriate voltage. Install...to the system board. Open hood and check that the unit is solved. 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 by a two second pause...
...2. Try the following: 1. Check that the voltage selector, located on the rear of the Desktop Management Guide for less than 4 seconds. Reflash the system ROM with the latest BIOS image. Beeps stop after fifth iteration but LEDs continue until problem is set to the appropriate voltage. Install...to the system board. Open hood and check that the unit is solved. 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 by a two second pause...