HP XW3400 Diskette, or optical drives, and expansion, Cards. Power on the system. If the system

Table C-2Diagnostic Front Panel LEDs and Audible Codes (continued)

Activity	Beeps	Possible Cause	Recommended Action
Red Power LED flashes four	4	Power failure (power	1. Open the hood and ensure the 4 or 6-wire
times, once every second,		supply is overloaded).	power supply cable is seated into the
followed by a two second			connector on the system board.
pause. Beeps stop after fifth			2. Check if a device is causing the problem by
iteration but LEDs continue until
problem is solved.			removing ALL attached devices (such as hard,
			diskette, or optical drives, and expansion
			cards). Power on the system. If the system
			enters the POST, then power off and replace
			one device at a time and repeat this
			procedure until failure occurs. Replace the
			device that is causing the failure. Continue
			adding devices one at a time to ensure all
			devices are functioning properly.
			3. Replace the power supply.
			4. Replace the system board.

Red Power LED flashes five 5

times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved.

Pre-video memory error.

CAUTION: To avoid damage to the DIMMs or the system board, you must unplug the workstation 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.

Red Power LED flashes six times, 6 once every second, followed by

a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved.

Pre-video graphics error.	For systems with a graphics card:
	1.	Reseat the graphics card.
	2.	Replace the graphics card.

		3. Replace the system board.
		For systems with integrated graphics, replace the
		system board.
Red Power LED flashes seven	7	System board failure (ROM Replace the system board.
times, once every second,		detected failure prior to
followed by a two second		video).
pause. Beeps stop after fifth
iteration but LEDs continue until
problem is solved.

Red Power LED flashes eight 8

times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue until problem is solved.

Invalid ROM based on bad 1.	Reflash the system ROM with the latest BIOS
checksum.	image. See the “Boot Block Emergency
	Recovery Mode” section 3.4.
2.	Replace the system board.

116 Appendix C POST error messages ENWW