Troubleshooting Without Diagnostics

 

 

 

 

 

 

Solving General Problems (Continued)

 

 

 

 

 

Problem

Cause

Solution

 

 

 

System does not power

System unable to power

Press and hold the power button for

on and the LEDs on the

on.

less than 4 seconds. If the hard drive

front of the computer

 

LED turns green, then:

are not flashing.

 

1.

Check that the voltage selector,

 

 

 

 

 

located on the rear of the power

 

 

 

supply on select models, is set to

 

 

 

the appropriate voltage. Proper

 

 

 

voltage setting depends on your

 

 

 

region.

 

 

2.

Remove the expansion cards one

 

 

 

at a time until the 5V_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 5V_aux light

 

 

 

on the system board is turned on.

 

 

 

If it is turned on, then replace the

 

 

 

power button harness.

 

 

5.

If the 5V_aux light on the system

 

 

 

board is not turned on, then

 

 

 

replace the power supply.

 

 

6.

Replace the system board.

 

 

 

 

Troubleshooting Guide

www.hp.com

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HP DC5100 manual Troubleshooting Without Diagnostics

DC5100 specifications

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