POST Error Messages

Diagnostic Front Panel LEDs and Audible Codes (Continued)

Activity

Beeps

Possible Cause

Recommended Action

 

 

 

 

 

Red Power LED

4

Power failure

1.

Open the hood and ensure the

flashes four times,

 

(power supply is

 

4-wire power supply cable is

once every second,

 

overloaded).

 

seated into the connector on the

followed by a two

 

 

 

system board.

second pause.

 

 

2.

Check if a device is causing the

 

 

 

 

 

 

 

problem by removing ALL attached

 

 

 

 

devices (such as hard, diskette, or

 

 

 

 

optical drives, and expansion

 

 

 

 

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 memory

1.

Reseat DIMMs. Power on the

flashes five times,

 

error.

 

system.

once every second,

 

 

2.

Replace DIMMs one at a time to

followed by a two

 

 

 

 

 

isolate the faulty module.

second pause.

 

 

 

 

 

3. Replace third-party memory with

 

 

 

 

 

 

 

HP memory.

 

 

 

4.

Replace the system board.

 

 

 

 

Red Power LED

6

Pre-video graphics

For systems with a graphics card:

flashes six times,

 

error.

1.

Reseat the graphics card. Power on

once every second,

 

 

 

 

 

the system.

followed by a two

 

 

 

 

 

2.

Replace the graphics card.

second pause.

3. Replace the system board.

For systems with integrated graphics, replace the system board.

A–16

www.hp.com

Troubleshooting Guide