HP dc7608 manual Board is turned on. If it is turned on, then

POST Error Messages

POST Diagnostic Front Panel LEDs and Audible Codes (Continued)

Activity	Beeps	Possible Cause	Recommended Action
Red Power LED	9	System powers on	Check that the voltage selector, located on
flashes nine times,		but is unable to	the rear of the power supply (some
once every		boot.	models), is set to the appropriate voltage.
second, followed			Proper voltage setting depends on your
by a two second			region.
pause.			Replace the power supply.
			Replace the processor.
			Replace the system board.
Red Power LED	10	Bad option card.	Check each option card by removing the
flashes ten times,			card (one at a time if multiple cards), then
once every			power on the system to see if fault goes
second, followed			away.
by a two second			Once a bad card is identified, remove and
pause.			replace the bad option card.
			Replace the system board.
System does not	None	System unable to	Press and hold the power button for less
power on and		power on.	than 4 seconds. If the hard drive LED turns
LEDs are not			green, then check that the voltage selector,
flashing.			located on the rear of the power supply, is
			set to the appropriate voltage. Proper
			voltage setting depends on your region.
			Remove the expansion cards one at a time
			until the LED light on the system board
			turns on.
			Replace the system board.
			OR
			Press and hold the power button for less
			than 4 seconds. If the hard drive LED does
			not turn on green then:
			Check that the unit is plugged into a
			working AC outlet.
			Open hood and check that the power
			button harness is properly connected to
			the system board.
			Check that both power supply cables are
			properly connected to the system board.
			Check to see if the LED light on the system
			board is turned on. If it is turned on, then
			replace the power button harness.
			If the LED light on the system board is not
			turned on, then replace the power supply.
			Replace the system board.

Service Reference Guide, dc7600 390742-002 C–11