POST Error Messages

POST Diagnostic Front Panel LEDs and Audible Codes (Continued)

Activity

Beeps

Possible Cause

Recommended Action

 

 

 

 

Red Power LED

4

Power failure

Open the hood and ensure the power

flashes four times,

 

(power supply is

supply cable is seated into the connector

once every

 

overloaded).

on the system board.

second, followed

 

 

Check if a device is causing the problem

by a two second

 

 

by removing ALL attached devices (such as

pause.

 

 

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.

 

 

 

Replace the power supply.

 

 

 

Replace the system board.

 

 

 

 

Red Power LED

5

Pre-video memory

Reseat DIMMs. Power on the system.

flashes five times,

 

error.

Replace DIMMs one at a time to isolate

once every

 

 

the faulty module.

second, followed

 

 

Replace third-party memory with HP

by a two second

 

 

 

 

memory.

pause.

 

 

 

 

Replace the system board.

 

 

 

 

 

 

 

Red Power LED

6

Pre-video

For systems with a graphics card:

flashes six times,

 

graphics error.

Reseat the graphics card. Power on the

once every

 

 

system.

second, followed

 

 

Replace the graphics card.

by a two second

 

 

 

 

Replace the system board.

pause.

 

 

 

 

 

For systems with integrated graphics,

 

 

 

replace the system board.

 

 

 

 

Red Power LED

7

System board

Replace the system board.

flashes seven

 

failure (ROM

 

times, once every

 

detected failure

 

second, followed

 

prior to video).

 

by a two second

 

 

 

pause.

 

 

 

 

 

 

 

Red Power LED

8

Invalid ROM

Reflash the ROM with the latest BIOS

flashes eight times,

 

based on bad

image. See the “ROM Flash” section of the

once every

 

checksum.

Desktop Management Guide on the

second, followed

 

 

Documentation and Diagnostics CD.

by a two second

 

 

Replace the system board.

pause.

 

 

 

 

 

 

 

C–10

390742-002

Service Reference Guide, dc7600