C–8 361288-003 Service Reference Guide, dc7100
Red Power LED
flashes three times,
once every
second, followed
by a two second
pause. Beeps stop
after the fifth
iteration but the
LED continues to
flash until the issue
has been resolved.
3 Processor not
installed (not an
indicator of bad
processor).
Check to see that the processor is present.
Reseat the processor.
Red Power LED
flashes four times,
once every
second, followed
by a two second
pause. Beeps stop
after the fifth
iteration but the
LED continues to
flash until the issue
has been resolved.
4 Power failure
(power supply is
overloaded).
Open the hood and ensure the power
supply cable is seated into the connector
on the system board.
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.
Replace the power supply.
Replace the system board.
Red Power LED
flashes five times,
once every
second, followed
by a two second
pause. Beeps stop
after the fifth
iteration but the
LED continues to
flash until the issue
has been resolved.
5 Pre-video
memory error.
Reseat DIMMs. Power on the system.
Replace DIMMs one at a time to isolate
the faulty module.
Replace third-party memory with HP
memory.
Replace the system board.
Activity Beeps
Possible
Cause Recommended Action
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