HP DC5100 manual Set properly

			Troubleshooting Without Diagnostics
Solving Display Problems (Continued)
Problem	Cause	Solution
Blank screen and the	Pre-video graphics	For systems with a graphics card:
power LED flashes Red six	error.	1.	Reseat the graphics card.
times, once every second,
			Power on the system.
followed by a two second
		2.	Replace the graphics card.
pause, and the computer
		3.	Replace the system board.
beeps six times.

For systems with integrated graphics, replace the system board.

Blank screen and the power LED flashes Red seven times, once every second, followed by a two second pause, and the computer beeps seven times.

System board failure	Replace the system board.
(ROM detected failure
prior to video).

Monitor does not function properly when used with energy saver features.

Monitor without energy	Disable monitor energy saver
saver capabilities is	feature.
being used with energy
saver features enabled.

Dim characters.	The brightness and
	contrast controls are not
	set properly.

Adjust the monitor brightness and contrast controls.

Cables are not properly	Check that the graphics cable is
connected.	securely connected to the graphics
	card and the monitor.

Blurry video or requested	If the graphics controller
resolution cannot be set.	was upgraded, the
	correct graphics drivers
	may not be loaded.

Install the video drivers included in the upgrade kit.

Monitor is not capable	Change requested resolution.
of displaying requested
resolution.
Graphics card is bad.	Replace the graphics card.

Troubleshooting Guide www.hp.com 2–21