HP COMPAQ DC5750 - Manual (Page 165)

Service Reference Guide, dc5750 437963-001 C–11
POST Error Messages
Red Power LED
flashes nine times,
once every
second, followed
by a two second
pause. Beeps stop
after fifth iteration
but LEDs continue
until problem is
solved.
9 System powers on
but is unable to
boot.
1. Check that the voltage selector,
located on the rear of the power
supply (some models), is set to the
appropriate voltage. Proper voltage
setting depends on your region.
2. Replace the processor.
3. Replace the system board.
Red Power LED
flashes ten times,
once every
second, followed
by a two second
pause. Beeps stop
after fifth iteration
but LEDs continue
until problem is
solved.
10 Bad option card. 1. Check each option card by removing
the card (one at a time if multiple
cards), then power on the system to
see if fault goes away.
2. Once a bad card is identified, remove
and replace the bad option card.
3. Replace the system board.
POST Diagnostic Front Panel LEDs and Audible Codes (Continued)
Activity Beeps Possible Cause Recommended Action