HP RP7 Hardware Reference Guide HP RP7 Retail System Model 7800 - Page 72

Appendix A, Troubleshooting, Diagnostic Front Panel LEDs and Audible Codes continued

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Table A-1 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. Beeps stop after fifth iteration but LEDs continue until problem is solved. Power failure (power supply is overloaded). 1. Ensure the DC power cable is plugged into the I/O panel. 2. Check if a device is causing the problem by removing ALL attached devices (such as a hard drive). Power on the system. If the system enters the POST, then power off and replace the device to see if the problem is resolved. 3. Replace the power supply. 4. Replace the system board. Red Power LED flashes five 5 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Pre-video memory error. CAUTION: To avoid damage to the SODIMMs or the system board, you must unplug the computer power cord before attempting to reseat, install, or remove a SODIMM module. 1. Reseat SODIMMs. 2. Replace SODIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. Red Power LED flashes six 6 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Pre-video graphics error. 1. Unplug the power cord. Press the CMOS reset button. Install the FDO jumper to disable ME (or remove the FDO jumper to disable ME if it was installed). 2. Replace the system board. Red Power LED flashes 7 seven times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. System board failure (ROM detected failure prior to video). Replace the system board. Red Power LED flashes eight 8 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Invalid ROM based on bad checksum. 1. Reflash the system ROM with the latest BIOS image. 2. Replace the system board. Red Power LED flashes nine 9 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. System powers on but is unable to boot. 1. Replace the processor. 2. Replace the system board. 66 Appendix A Troubleshooting

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Table A-1
Diagnostic Front Panel LEDs and Audible Codes (continued)
Activity
Beeps
Possible Cause
Recommended Action
Red Power LED flashes four
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
4
Power failure (power
supply is overloaded).
1.
Ensure the DC power cable is plugged into
the I/O panel.
2.
Check if a device is causing the problem by
removing ALL attached devices (such as a
hard drive). Power on the system. If the
system enters the POST, then power off
and replace the device to see if the problem
is resolved.
3.
Replace the power supply.
4.
Replace the system board.
Red Power LED flashes five
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
5
Pre-video memory error.
CAUTION:
To avoid damage to the SODIMMs
or the system board, you must unplug the
computer power cord before attempting to
reseat, install, or remove a SODIMM module.
1.
Reseat SODIMMs.
2.
Replace SODIMMs one at a time to isolate
the faulty module.
3.
Replace third-party memory with HP
memory.
4.
Replace the system board.
Red Power LED flashes six
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
6
Pre-video graphics error.
1.
Unplug the power cord. Press the CMOS
reset button. Install the FDO jumper to
disable ME (or remove the FDO jumper to
disable ME if it was installed).
2.
Replace the system board.
Red Power LED flashes
seven times, once every
second, followed by a two
second pause. Beeps stop
after fifth iteration but LEDs
continue until problem is
solved.
7
System board failure
(ROM detected failure
prior to video).
Replace the system board.
Red Power LED flashes eight
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
8
Invalid ROM based on
bad checksum.
1.
Reflash the system ROM with the latest
BIOS image.
2.
Replace the system board.
Red Power LED flashes nine
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
9
System powers on but is
unable to boot.
1.
Replace the processor.
2.
Replace the system board.
66
Appendix A
Troubleshooting