HP Microtower PC dx2200 Solving Minor Problems (Continued)

			Troubleshooting Without Diagnostics
Solving Minor Problems (Continued)
Problem	Cause	Possible Solution
Computer powered off	Processor thermal	1.	Ensure computer air vents are not
automatically and the	protection activated:		blocked and the cooling fan is
Power LED flashes every	A fan may be blocked or		running.
four seconds.	not turning.	2.	Open hood, press power button,
	OR		and see if the processor fan
	The heatsink is not		spins. If not spinning, make sure
			the fan's cable is plugged onto
	properly attached to the
			the system board header. Ensure
	processor.
			the fan is fully/properly seated or
			installed.
		3.	Replace the processor fan.
		4.	Reseat processor heatsink and
			verify that the fan assembly is
			properly attached.
System does not power	System unable to power	Press and hold the power button for
on and the LEDs on the	on.	less than 4 seconds. If the hard drive
front of the computer		LED turns green, then:
are not flashing.		1.	Check that the voltage selector is
			set to the appropriate voltage.
		2.	Remove the expansion cards one
			at a time until the 3.3 V_aux light
			on the system board turns on.
		3.	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:
		1.	Check that the unit is plugged
			into a working AC outlet.
		2.	Open hood and check that the
			power button harness is properly
			connected to the system board.
		3.	Check that both power supply
			cables are properly connected to
			the system board.
		4.	If the 3.3 V_aux light on the
			system board is on, then replace
			the power button harness.
		5.	If the 3.3 V_aux light on the
			system board is off, then replace
			the power supply.
		6.	Replace the system board.

Service Reference Guide, dx2200 MT 415606-001 E–3