POST Error Messages

Diagnostic Front Panel LEDs and Audible Codes (Continued)

Activity

Beeps

Possible Cause

Recommended Action

 

 

 

 

System does not

None

System unable to

Press and hold the power button for less

power on and LEDs

 

power on.

than 4 seconds. If the hard drive LED

are not flashing.

 

 

turns green, then:

 

 

 

1.

Check that the voltage selector,

 

 

 

 

located on the rear of the power

 

 

 

 

supply, is set to the appropriate

 

 

 

 

voltage. Proper voltage setting

 

 

 

 

depends on your region.

 

 

 

2.

Remove the expansion cards one at

 

 

 

 

a time until the 3V_aux light on the

 

 

 

 

system board turns on.

 

 

 

3.

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 3V_aux light on the system board is turned on. If it is turned on, then replace the power button harness.

5. If the 3V_aux light on the system board is not turned on, then replace the power supply.

6. Replace the system board.

A–18

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Troubleshooting Guide

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HP DC5100 manual Diagnostic Front Panel LEDs and Audible Codes

DC5100 specifications

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