HP DX2250 manual Interpreting Diagnostic Lights, Activity Possible Cause Recommended Action

Interpreting Diagnostic Lights

This section covers the front panel LED codes that may occur before or during POST that do not necessarily have an error code or text message associated with them.

NOTE: If you see flashing LEDs on a PS/2 keyboard, look for flashing LEDs on the front panel of the computer and refer to the following table to determine the front panel LED codes.

Recommended actions in the following table are listed in the order in which they should be performed.

Replace the system board or power supply only as the last resort.

Activity	Possible Cause	Recommended Action
Green Power LED On.	Computer on.	None
Green Power LED flashes every	Processor thermal protection	1.	Ensure that the computer air vents are not blocked
one second.	activated:		and the processor cooling fan is running.
	A fan may be blocked or not	2.	Open hood, press power button, and see if the
	turning.		processor fan spins. If the processor fan is not
	OR		spinning, make sure the fan's cable is plugged onto
			the system board header. Ensure the fan is fully/
	The heatsink/fan assembly is		properly seated or installed.
	not properly attached to the			WARNING! Rotating fan blades can
	processor.
				cause serious bodily harm. Be sure to keep
				your hands away from the rotating blades.
		3.	If fan is plugged in and seated properly, but is not
			spinning, then replace processor fan.
		4.	Reseat processor heatsink and verify that the fan
			assembly is properly attached.
		5.	Contact an authorized reseller or service provider.
Green Power LED flashes every	Computer in Suspend to RAM	Press any key or move the mouse to wake the computer.
two seconds.	mode (some models only) or
	normal Suspend mode.

Green Power LED flashes five	Pre-video memory error.
times, once every second, followed
by a two second pause.

CAUTION: To avoid damage to the DIMMs or the system board, you must unplug the computer power cord before attempting to reseat, install, or remove a DIMM module.

1.Reseat DIMMs.

2.Replace DIMMs one at a time to isolate the faulty module.

3.Replace third-party memory with HP memory.

4.Replace the system board.

14 Chapter 2 Troubleshooting ENWW