HP 800 G1 21.5 Non-Touch manual Verify monitor is attached and turned

Control panel message	Description	Recommended action
304-Keyboard or System Unit Error	Keyboard failure.	1.	Reconnect the keyboard with computer
			turned off.
		2.	Ensure that none of the keys are
			depressed.
		3.	Replace the keyboard.
		4.	Replace the system board.
501-Display Adapter Failure	Graphics display controller.	1.	Reseat the graphics card (if applicable).
		2.	Clear CMOS. (See Appendix B,
			Password security and resetting CMOS
			on page 192.)
		3.	Verify monitor is attached and turned
			on.
		4.	Replace the graphics card (if possible).

510-Flash Screen Image Corrupted Flash Screen image has errors.

Reflash the system ROM with the latest BIOS image.

511-CPU, CPUA, or CPUB Fan not Detected CPU fan is not connected or may have	1.	Reseat CPU fan.
malfunctioned.	2.	Reseat fan cable.
	3.	Replace CPU fan.

512-Chassis, Rear Chassis, or Front Chassis Fan not Detected

Chassis, rear chassis, or front chassis fan is not connected or may have malfunctioned.

1.Reseat chassis, rear chassis, or front chassis fan.

2.Reseat fan cable.

3.Replace chassis, rear chassis, or front chassis fan.

513-Front Chassis fan not detected	Front chassis fan is not connected or may	1.	Reseat front chassis fan.
	have malfunctioned.	2.	Reseat fan cable.
		3.	Replace front chassis fan.
514-CPU or Chassis Fan not Detected	CPU or chassis fan is not connected or may	1.	Reseat CPU or chassis fan.
	have malfunctioned.	2.	Reseat fan cable.
		3.	Replace CPU or chassis fan.
515-Power Supply fan not detected	Power supply fan is not connected or may	1.	Reseat power supply fan.
	have malfunctioned.	2.	Reseat fan cable.
		3.	Replace power supply fan.
660-Display cache is detected unreliable	Integrated graphics controller display cache	Replace system board if minimal graphics
	is not working properly and will be disabled.	degrading is an issue.
912-Computer Cover Has Been Removed	Computer cover was removed since last	No action required.
Since Last System Startup	system startup.

POST numeric codes and text messages 183