HP Dc5700 Troubleshooting Guide - Page 64

Diagnostic Front Panel LEDs and Audible Codes continued, Table A-2

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Table A-2 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action 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. Check that the voltage selector, located on the rear of the power supply (some models), is set to the appropriate voltage. Proper voltage setting depends on your region. 2. Unplug the AC power cord from the computer, wait 30 seconds, then plug the power cord back in to the computer. 3. Replace the system board. 4. Replace the processor. Red Power LED flashes ten 10 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved. Bad option card. 1. Check each option card by removing the card (one at a time if multiple cards), then power on the system to see if fault goes away. 2. Once a bad card is identified, remove and replace the bad option card. 3. Replace the system board. System does not power on and None LEDs are not flashing. System unable to power on. Press and hold the power button for less than 4 seconds. If the hard drive LED turns green, the power button is working correctly. Try the following: 1. Check that the voltage selector (some models), located on the rear of the power supply, is set to the appropriate voltage. Proper voltage setting depends on your region. 2. Replace the system board. OR Press and hold the power button for less than 4 seconds. If the hard drive LED does not turn on green then: 1. Check that the unit is plugged into a working AC outlet. 2. Open hood and check that the power button harness is properly connected to the system board. 3. Check that both power supply cables are properly connected to the system board. 4. Check to see if the 5V_aux light on the system board is turned on. If it is turned on, then replace the power button harness. If the problem persists, replace the system board. 5. 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. It the problem persists, replace the power supply. 58 Appendix A POST Error Messages ENWW

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Activity
Beeps
Possible Cause
Recommended Action
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.
Check that the voltage selector, located on
the rear of the power supply (some models),
is set to the appropriate voltage. Proper
voltage setting depends on your region.
2.
Unplug the AC power cord from the
computer, wait 30 seconds, then plug the
power cord back in to the computer.
3.
Replace the system board.
4.
Replace the processor.
Red Power LED flashes ten
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
10
Bad option card.
1.
Check each option card by removing the card
(one at a time if multiple cards), then power
on the system to see if fault goes away.
2.
Once a bad card is identified, remove and
replace the bad option card.
3.
Replace the system board.
System does not power on and
LEDs are not flashing.
None
System unable to power
on.
Press and hold the power button for less than 4
seconds. If the hard drive LED turns green, the
power button is working correctly. Try the
following:
1.
Check that the voltage selector (some
models), located on the rear of the power
supply, is set to the appropriate voltage.
Proper voltage setting depends on your
region.
2.
Replace the system board.
OR
Press and hold the power button for less than 4
seconds. If the hard drive LED does not turn on
green then:
1.
Check that the unit is plugged into a working
AC outlet.
2.
Open hood and check that the power button
harness is properly connected to the system
board.
3.
Check that both power supply cables are
properly connected to the system board.
4.
Check to see if the 5V_aux light on the
system board is turned on. If it is turned on,
then replace the power button harness. If the
problem persists, replace the system board.
5.
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. It the problem persists,
replace the power supply.
Table A-2
Diagnostic Front Panel LEDs and Audible Codes (continued)
58
Appendix A
POST Error Messages
ENWW