Service Reference Guide, dc5000 360201-002 D–27
Troubleshooting Without Diagnostics
Red Power LED
stays on.
OR
Red Power LED
flashes three
times, once
every second,
followed by a
two second
pause.
None Processor not
installed (not an
indicator of bad
processor).
1. Check to see that the processor is
present.
2. Reseat the processor.
Red Power LED
flashes once
every two
seconds.
OR
Red Power LED
flashes four
times, once
every second,
followed by a
two second
pause.
None Power failure
(power supply is
overloaded).
1. Check that the voltage selector,
located on the rear of the power
supply, is set to the appropriate
voltage. Proper voltage setting
depends on your region.
2. Open the hood and ensure the 4-wire
power supply cable is seated into the
connector on the system board.
3. 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.
4. Replace the power supply.
5. Replace the system board.
Red Power LED
flashes five
times, once
every second,
followed by a
two second
pause.
5 Pre-video memory
error
1. Reseat DIMMs. Power on the system.
2. Replace DIMMs one at a time to
isolate the faulty module.
3. Replace third-party memory with HP
memory.
4. Replace the system board.
Red Power LED
flashes six times,
once every
second,
followed by a
two second
pause.
6 Pre-video graphics
error.
For systems with a graphics card:
1. Reseat the graphics card. Power on
the system.
2. Replace the graphics card.
3. Replace the system board.
For systems with integrated graphics,
replace the system board.
Diagnostic Front Panel LEDs and Audible Codes (Continued)
Activity Beeps Possible Cause Recommended Action
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