Troubleshooting Without Diagnostics

Diagnostic Front Panel LEDs and Audible Codes (Continued)

Activity

Beeps Possible Cause Recommended Action

Red Power LED

None

Processor not

stays on.

 

installed (not an

OR

 

indicator of bad

Red Power LED

 

processor).

 

 

flashes three

 

 

times, once

 

 

every second,

 

 

followed by a

 

 

two second

 

 

pause.

 

 

1.Check to see that the processor is present.

2.Reseat the processor.

Red Power LED

None

Power failure

1.

Check that the voltage selector,

flashes once

 

(power supply is

 

located on the rear of the power

every two

 

overloaded).

 

supply, is set to the appropriate

seconds.

 

 

 

voltage. Proper voltage setting

OR

 

 

 

depends on your region.

Red Power LED

 

 

2.

Open the hood and ensure the 4-wire

flashes four

 

 

 

power supply cable is seated into the

times, once

 

 

 

connector on the system board.

every second,

 

 

3.

Check if a device is causing the

followed by a

 

 

 

problem by removing ALL attached

two second

 

 

 

devices (such as hard, diskette, or

pause.

 

 

 

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.

 

 

 

4.

Replace the power supply.

 

 

 

5.

Replace the system board.

 

 

 

 

 

Red Power LED

5

Pre-video memory

1.

Reseat DIMMs. Power on the system.

flashes five

 

error

2.

Replace DIMMs one at a time to

times, once

 

 

 

 

 

isolate the faulty module.

every second,

 

 

 

 

 

3.

Replace third-party memory with HP

followed by a

 

 

 

 

 

memory.

two second

 

 

 

 

 

 

 

pause.

 

 

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

 

 

 

 

 

the system.

second,

 

 

 

 

 

2.

Replace the graphics card.

followed by a

 

 

 

 

 

 

two second

 

 

3.

Replace the system board.

pause.

 

 

For systems with integrated graphics,

 

 

 

replace the system board.

 

 

 

 

 

Service Reference Guide, dc5000

360201-002

D–27