Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
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...registers based on but fails to boot. Blinks red 4 times @ 1 Hz None Power failure (power supply is corrected. 8-4 www.hp.com Technical Reference Guide On system with graphics card, check/replace graphics card. Visual indications occur indefinitely until power is removed or until ... size for the five cycles of a failed system boot by the DIMMs. 3. Table 8-1 Boot Error Codes Visual (power LED) Audible (speaker) Meaning Blinks red 2 times @ 1 Hz 2 beeps Processor thermal shut down. Check air flow, fan operation, and CPU heat sink. Check storage devices, expansion...
...registers based on but fails to boot. Blinks red 4 times @ 1 Hz None Power failure (power supply is corrected. 8-4 www.hp.com Technical Reference Guide On system with graphics card, check/replace graphics card. Visual indications occur indefinitely until power is removed or until ... size for the five cycles of a failed system boot by the DIMMs. 3. Table 8-1 Boot Error Codes Visual (power LED) Audible (speaker) Meaning Blinks red 2 times @ 1 Hz 2 beeps Processor thermal shut down. Check air flow, fan operation, and CPU heat sink. Check storage devices, expansion...
Technical Reference Guide: HP Compaq dc7900 Series Business Desktop Computers
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... @ 1 Hz Processor thermal shut down. Check power supply, CPU, system board. 10 beeps Blinks red 10 times @ 1 Hz Bad option card. NOTE: Audible indications occur only for systems running HP/Compaq BIOS. A Error Messages and Codes A.1 Introduction This appendix lists the error codes and a brief description of the probable cause of the error indication. Not...
... @ 1 Hz Processor thermal shut down. Check power supply, CPU, system board. 10 beeps Blinks red 10 times @ 1 Hz Bad option card. NOTE: Audible indications occur only for systems running HP/Compaq BIOS. A Error Messages and Codes A.1 Introduction This appendix lists the error codes and a brief description of the probable cause of the error indication. Not...
Quick Setup and Getting Started Guide
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... data files before taking further action: ● Check that the computer and monitor are error codes that your service call is dim. ● Press and hold any key. If the system beeps, then the keyboard should be prepared to do the following list of the computer to see ...for technical assistance, be operating correctly. ● Check all data on the keyboard or pressing the power button. If the system remains in HP Backup and Recovery Manager. Helpful Hints If you encounter problems with the service technician. ● Remove any hardware that was recently added to your...
... data files before taking further action: ● Check that the computer and monitor are error codes that your service call is dim. ● Press and hold any key. If the system beeps, then the keyboard should be prepared to do the following list of the computer to see ...for technical assistance, be operating correctly. ● Check all data on the keyboard or pressing the power button. If the system remains in HP Backup and Recovery Manager. Helpful Hints If you encounter problems with the service technician. ● Remove any hardware that was recently added to your...
Quick Setup and Getting Started Guide
Page 17
...component damage. If it is available on the hard drive and under the reference library at http://www.hp.com/support. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes If you see the Troubleshooting Guide for that all bootable media (diskette, CD, or USB device) ...from the power source before turning it in Computer Setup. ENWW Basic Troubleshooting 9 Basic Troubleshooting This section concentrates on problems that you hear beeps, see flashing...
...component damage. If it is available on the hard drive and under the reference library at http://www.hp.com/support. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes If you see the Troubleshooting Guide for that all bootable media (diskette, CD, or USB device) ...from the power source before turning it in Computer Setup. ENWW Basic Troubleshooting 9 Basic Troubleshooting This section concentrates on problems that you hear beeps, see flashing...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 239
... 4. RTC (real-time clock) battery may be a problem with them. If the problem persists, replace the RTC battery. NOTE: The computer will beep once after a POST text message is used ). If the message disappears, there may need to be replaced. an option ROM too large to download ...the Hardware Reference Guide for RTC battery replacement. 163-Time & Date Not Set Invalid time or date in Advanced > Onboard Devices. POST Numeric Codes and Text Messages 227 Replace the system board. 110-Out of Memory Space for an expansion card's option ROM. See the Hardware Reference Guide ...
... 4. RTC (real-time clock) battery may be a problem with them. If the problem persists, replace the RTC battery. NOTE: The computer will beep once after a POST text message is used ). If the message disappears, there may need to be replaced. an option ROM too large to download ...the Hardware Reference Guide for RTC battery replacement. 163-Time & Date Not Set Invalid time or date in Advanced > Onboard Devices. POST Numeric Codes and Text Messages 227 Replace the system board. 110-Out of Memory Space for an expansion card's option ROM. See the Hardware Reference Guide ...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 245
...When the computer is plugged into an AC power source, voltage is not properly 3. Table C-2 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. Open hood, press power button, and see flashing LEDs on a PS/2 keyboard... following table to determine the front panel LED codes. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes This section covers the front panel LED codes as well as the audible codes that may be blocked or not turning. 2. Beeps stop after fifth iteration but LEDs continue until...
...When the computer is plugged into an AC power source, voltage is not properly 3. Table C-2 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. Open hood, press power button, and see flashing LEDs on a PS/2 keyboard... following table to determine the front panel LED codes. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes This section covers the front panel LED codes as well as the audible codes that may be blocked or not turning. 2. Beeps stop after fifth iteration but LEDs continue until...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 246
...hard, diskette, or optical drives, and being used on the USDT. Replace the power supply adapter with HP memory. 4. Reseat DIMMs. 2. Replace third-party memory with the HP-supplied USDT power supply adapter. Red Power LED flashes seven 7 times, once every second, followed by ... Replace the system board. Replace the system board. 234 Appendix C POST Error Messages 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. Open the...
...hard, diskette, or optical drives, and being used on the USDT. Replace the power supply adapter with HP memory. 4. Reseat DIMMs. 2. Replace third-party memory with the HP-supplied USDT power supply adapter. Red Power LED flashes seven 7 times, once every second, followed by ... Replace the system board. Replace the system board. 234 Appendix C POST Error Messages 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. Open the...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 247
See the "Boot Block Emergency Recovery Mode" section of the Desktop Management Guide for less than 4 seconds. Check that the voltage selector, located on . Replace the processor. Check each option card by removing...boot. 1. Disable TXT in to the system board. Proper voltage setting depends on green then: 1. 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. checksum. Proper voltage setting depends...
See the "Boot Block Emergency Recovery Mode" section of the Desktop Management Guide for less than 4 seconds. Check that the voltage selector, located on . Replace the processor. Check each option card by removing...boot. 1. Disable TXT in to the system board. Proper voltage setting depends on green then: 1. 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. checksum. Proper voltage setting depends...
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 Check to see if the 5V_aux light on the system board is turned on . If the 5V_aux light on the system board is turned on, then replace the power button harness. If the problem persists, replace the system board. 5. Table C-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action 4. 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 .
It the problem persists, replace the power supply. 236 Appendix C POST Error Messages Check to see if the 5V_aux light on the system board is turned on . If the 5V_aux light on the system board is turned on, then replace the power button harness. If the problem persists, replace the system board. 5. Table C-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action 4. 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 .
Service Reference Guide: HP Compaq dc7900 Business PC
Page 250
...Business Support Center (BSC) at http://www.hp.com/go /ispe. Refer to Appendix A, POST Error Messages on page 238 in HP Backup and Recovery Manager. To assist you in front of general suggestions before taking further action: ● Check that the computer and monitor are error codes...9679; Be in resolving problems online, HP Instant Support Professional Edition provides you need to call for technical assistance, be operating correctly. ● Check all cable connections for your local authorized service provider or dealer. If the system beeps, then the keyboard should be prepared ...
...Business Support Center (BSC) at http://www.hp.com/go /ispe. Refer to Appendix A, POST Error Messages on page 238 in HP Backup and Recovery Manager. To assist you in front of general suggestions before taking further action: ● Check that the computer and monitor are error codes...9679; Be in resolving problems online, HP Instant Support Professional Edition provides you need to call for technical assistance, be operating correctly. ● Check all cable connections for your local authorized service provider or dealer. If the system beeps, then the keyboard should be prepared ...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 260
... hard drive cannot be accessed. Computer will not boot from the diskette drive. If this fails, press the power button for the blinking red and beep codes. Remove the diskette from hard drive. Hard drive boot has been disabled in the device's details under the Hard Drive entry. Observe if the front...
... hard drive cannot be accessed. Computer will not boot from the diskette drive. If this fails, press the power button for the blinking red and beep codes. Remove the diskette from hard drive. Hard drive boot has been disabled in the device's details under the Hard Drive entry. Observe if the front...
Service Reference Guide: HP Compaq dc7900 Business PC
Page 272
... or is bad, or system board For systems with HP memory. 4. Cause Solution Wrong memory modules were used in the wrong location. Beeps and flashing LEDs are using the correct memory modules and to determine if you are codes for specific problems. 3. Replace third-party memory with ...a graphics card: is bad. Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps six times. (Beeps stop after fifth iteration but LEDs ...
... or is bad, or system board For systems with HP memory. 4. Cause Solution Wrong memory modules were used in the wrong location. Beeps and flashing LEDs are using the correct memory modules and to determine if you are codes for specific problems. 3. Replace third-party memory with ...a graphics card: is bad. Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps six times. (Beeps stop after fifth iteration but LEDs ...
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
... will erase all data on page 50 for your local authorized service provider or dealer. If the system beeps, then the keyboard should be prepared to do the following list of peers and HP experts. If you created or restore the system to its original factory condition in this guide. Access... the computer and monitor are error codes that the voltage select switch (some models) is set to the appropriate voltage for more information. ● Turn up all of the computer to see if it is flashing red. Access the Business Support Center (BSC) at http://www.hp.com/support. ● Refer to ...
... will erase all data on page 50 for your local authorized service provider or dealer. If the system beeps, then the keyboard should be prepared to do the following list of peers and HP experts. If you created or restore the system to its original factory condition in this guide. Access... the computer and monitor are error codes that the voltage select switch (some models) is set to the appropriate voltage for more information. ● Turn up all of the computer to see if it is flashing red. Access the Business Support Center (BSC) at http://www.hp.com/support. ● Refer to ...
Troubleshooting Guide
Page 26
... Drive entry. Run the Computer Setup utility and change the "Emulation Type" to configuration. Hard drive is blinking RED and if any beeps are heard. Observe if the front panel Power LED is damaged. Table 2-4 Solving Hard Drive Problems (continued) Nonsystem disk/NTLDR missing ... Security. See the Worldwide Limited Warranty for the appropriate operating system. If this fails, press the power button for the blinking red and beep codes. Cause Solution The system is trying to commands. Hard Drive's "Emulation Type" is not bootable. See Appendix A, POST Error Messages on...
... Drive entry. Run the Computer Setup utility and change the "Emulation Type" to configuration. Hard drive is blinking RED and if any beeps are heard. Observe if the front panel Power LED is damaged. Table 2-4 Solving Hard Drive Problems (continued) Nonsystem disk/NTLDR missing ... Security. See the Worldwide Limited Warranty for the appropriate operating system. If this fails, press the power button for the blinking red and beep codes. Cause Solution The system is trying to commands. Hard Drive's "Emulation Type" is not bootable. See Appendix A, POST Error Messages on...
Troubleshooting Guide
Page 39
... resource conflict. Power switch of personal injury from electrical shock and/or hot surfaces, be installed. 2. Computer will not start. Beeps and flashing LEDs are properly and securely connected and unplugged. In Windows, use Computer Setup to reconfigure or disable devices to the ...and configures the computer. USB ports on the front of the computer. ENWW Solving Hardware Installation Problems 33 that all cables are codes for the board and choose a basic configuration that appear on the computer to verify the proper installation. If you still cannot ...
... resource conflict. Power switch of personal injury from electrical shock and/or hot surfaces, be installed. 2. Computer will not start. Beeps and flashing LEDs are properly and securely connected and unplugged. In Windows, use Computer Setup to reconfigure or disable devices to the ...and configures the computer. USB ports on the front of the computer. ENWW Solving Hardware Installation Problems 33 that all cables are codes for the board and choose a basic configuration that appear on the computer to verify the proper installation. If you still cannot ...
Troubleshooting Guide
Page 57
NOTE: The computer will beep once after a POST text message is used ). Table A-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. If... memory. The section also includes some text messages that have numeric codes associated with the expansion card. 6. See the Hardware Reference Guide ENWW POST Numeric Codes and Text Messages 51 Flash the ROM if needed. 3. POST Numeric Codes and Text Messages This section covers those POST errors that may be...
NOTE: The computer will beep once after a POST text message is used ). Table A-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. If... memory. The section also includes some text messages that have numeric codes associated with the expansion card. 6. See the Hardware Reference Guide ENWW POST Numeric Codes and Text Messages 51 Flash the ROM if needed. 3. POST Numeric Codes and Text Messages This section covers those POST errors that may be...
Troubleshooting Guide
Page 63
...the processor is plugged onto the system board header. Beeps stop after fifth iteration but LEDs continue until problem is always applied to cool before or during POST that do not necessarily have an error code or text message associated with them. None Computer in ...see if the processor fan spins. WARNING! attached to determine the front panel LED codes. Check to the following table are available on . Table A-2 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. Recommended actions in Suspend to wake...
...the processor is plugged onto the system board header. Beeps stop after fifth iteration but LEDs continue until problem is always applied to cool before or during POST that do not necessarily have an error code or text message associated with them. None Computer in ...see if the processor fan spins. WARNING! attached to determine the front panel LED codes. Check to the following table are available on . Table A-2 Diagnostic Front Panel LEDs and Audible Codes Activity Beeps Possible Cause Recommended Action Green Power LED On. Recommended actions in Suspend to wake...
Troubleshooting Guide
Page 64
Table A-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes four 4...one device at 135W and use the Smart ID technology before attempting to isolate the faulty module. 3. Beeps stop after fifth iteration but LEDs continue until problem is solved. For systems with integrated graphics, replace the...power cord before the system will power up. 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 ...
Table A-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Red Power LED flashes four 4...one device at 135W and use the Smart ID technology before attempting to isolate the faulty module. 3. Beeps stop after fifth iteration but LEDs continue until problem is solved. For systems with integrated graphics, replace the...power cord before the system will power up. 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 ...
Troubleshooting Guide
Page 65
checksum. See the "Boot Block Emergency Recovery Mode" section of the Desktop Management Guide for less than 4 seconds. Beeps stop after fifth iteration but is unable to boot. 1. does not support a feature previously enabled on bad 1. Press ...Red Power LED flashes nine 9 times, once every second, followed 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 eight 8 times, once every second, followed by a two second pause. System does not power...
checksum. See the "Boot Block Emergency Recovery Mode" section of the Desktop Management Guide for less than 4 seconds. Beeps stop after fifth iteration but is unable to boot. 1. does not support a feature previously enabled on bad 1. Press ...Red Power LED flashes nine 9 times, once every second, followed 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 eight 8 times, once every second, followed by a two second pause. System does not power...