HP D3K72UT D3K72UT#ABA manual Solving Hardware Installation Problems

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

Cause	Solution
Memory is installed incorrectly or is bad.	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. Power on the system.
	2.	Replace DIMMs one at a time to isolate the faulty
		module.
		NOTE: DIMM1 or XMM1 must always be installed.
	3.	Replace third-party memory with HP memory.
	4.	Replace the system board.

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

Cause	Solution
Graphics card is not seated properly or is bad, or system	For systems with a graphics card:
board is bad.	1.	Reseat the graphics card. Power on the system.
	2.	Replace the graphics card.
	3.	Replace the system board.

For systems with integrated graphics, replace the system board.

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

Cause	Solution
Bad option card.	1.	Check each option card by removing the cards one at
		time (if multiple cards), then power on the system to see
		if fault goes away.
	2.	Once bad card is identified, remove and replace bad
		option card.
	3.	Replace the system board.

Solving Hardware Installation Problems 165