HP 800 G1 21.5 Non-Touch manual For systems with integrated graphics, replace

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. 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 Pre-video memory error. times, once every second,

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

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.
Red Power LED flashes six	6	Pre-video graphics error.	For systems with a graphics card:
times, once every second,			1.	Reseat the graphics card.
followed by a two second
pause. Beeps stop after fifth			2.	Replace the graphics card.
iteration but LEDs continue until
problem is solved.			3.	Replace the system board.
			For systems with integrated graphics, replace the
			system board.
Red Power LED flashes seven	7	System board failure	Replace the system board.
times, once every second,		(ROM detected failure
followed by a two second		prior to video).
pause. Beeps stop after fifth
iteration but LEDs continue until
problem is solved.
Red Power LED flashes eight	8	Invalid ROM based on	1.	Reflash the system ROM with the latest BIOS
times, once every second,		bad checksum.		image.
followed by a two second			2.	Replace the system board.
pause. Beeps stop after fifth

iteration but LEDs continue until problem is solved.

190 Chapter 10 POST error messages