POST Error Messages

Diagnostic Front Panel LEDs and Audible Codes (Continued)

 

 

Possible

 

 

Activity

Beeps

Cause

Recommended Action

 

 

 

 

 

Red Power LED

None

Power failure

1.

Open the hood and ensure the

flashes four times,

 

(power supply

 

4-wire power supply cable is

once every second,

 

is

 

seated into the connector on the

followed by a

 

overloaded).

 

system board.

two-second pause.

 

 

2.

Check if a device is causing the

The Power LED will

 

 

 

 

 

problem by removing ALL attached

continue flashing

 

 

 

 

 

 

devices (such as hard, diskette, or

until the problem is

 

 

 

 

 

 

optical drives, and expansion

resolved.

 

 

 

 

 

 

cards). Power on the system. If the

 

 

 

 

 

 

 

 

system enters the POST, then power

 

 

 

 

off and replace one device at a

 

 

 

 

time and repeat this procedure until

 

 

 

 

failure occurs. Replace the device

 

 

 

 

that is causing the failure. Continue

 

 

 

 

adding devices one at a time to

 

 

 

 

ensure all devices are functioning

 

 

 

 

properly.

 

 

 

3. Replace the power supply.

 

 

 

4.

Replace the system board.

 

 

 

 

 

Red Power LED

5

Pre-video

1.

Reseat DIMMs. Power on the

flashes five times,

 

memory error.

 

system.

once every second,

 

 

2.

Replace DIMMs one at a time to

followed by a

 

 

 

 

 

isolate the faulty module.

two-second pause.

 

 

 

 

 

3. Replace third-party memory with

The Power LED will

 

 

 

 

 

HP memory.

continue flashing

 

 

 

 

 

4.

Replace the system board.

until the problem is

 

 

resolved.

 

 

 

 

 

 

 

 

 

Troubleshooting Guide

www.hp.com

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