HP XW3400 manual Heatsink is not properly attached to the processor, Heatsink/fan assembly

Table D-1Solving General Problems (continued)

Poor performance is experienced.

Cause	Solution
Some software applications, especially games, are stressful on	1. Lower the display resolution for the current application or
the graphics subsystem	consult the documentation that came with the application
	for suggestions on how to improve performance by
	adjusting parameters in the application.
	2. Add more memory.
	3. Upgrade the graphics solution.
Cause unknown.	Restart the workstation.

Workstation powered off automatically and the Power LED flashes Red two times, once every second, followed by a two second pause, and the workstation beeps two times. (Beeps stop after fifth iteration but LEDs continue flashing).

Cause	Solution
Processor thermal protection activated:	1. Ensure that the workstation air vents are not blocked and
A fan may be blocked or not turning.		the processor cooling fan is running.
	2.	Open hood, press power button, and see if the processor
OR
		fan spins. If the processor fan is not spinning, make sure
The heatsink is not properly attached to the processor.		the fan's cable is plugged onto the system board header.
	3.	If fan is plugged in, but is not spinning, then replace the
		heatsink/fan assembly.
System does not power on and the LEDs on the front of the workstation are not flashing.
Cause	Solution

System unable to power on.

Press and hold the power button for less than 4 seconds. If the hard drive LED turns green, then:

1. Check that the voltage selector, located on the rear of the power supply on some models, is set to the appropriate voltage. Proper voltage setting depends on your region.

2. Remove the expansion cards one at a time until the 5V_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.

124 Appendix D Troubleshooting without diagnostics ENWW