HP dc7608 manual Select Enable VGA Mode

			Troubleshooting Without Diagnostics
Solving Display Problems (Continued)
Problem	Cause	Solution
Blank screen (no video).	Monitor cable plugged	If the computer system has both
(continued)	into the wrong	an integrated graphics connector
	connector.	and a graphics expansion card
		connector, plug the monitor cable
		into the expansion card connector.
		✎ If the graphics card is a
			standard PCI expansion card,
			you can enable the integrated
			graphics in Computer Setup. If
			a PCI-Express graphics card is
			installed, the integrated
			graphics can not be enabled.
	Monitor settings in the	1.	Restart the computer and press
	computer are not		F8 during startup when you see
	compatible with the		“Press F8” in the bottom right
	monitor.		corner of the screen.
		2.	Using the keyboard arrow keys,
			select Enable VGA Mode
			and press Enter.
		3.	In Windows Control Panel,
			double-click the Display icon
			and select the Settings tab.
		4.	Use the sliding control to reset
			the resolution.
Blank screen and the	Pre-video memory error.	1.	Reseat DIMMs. Power on the
power LED flashes Red five			system.
times, once every second,		2.	Replace DIMMs one at a time to
followed by a two second
			isolate the faulty module.
pause, and the computer
		3.	Replace third-party memory
beeps five times. Beeps
			with HP memory.
continue for five iterations
		4.	Replace the system board.
after which the LED flashes
will continue until the
problem is resolved.
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,
		2.	Replace the graphics card.
followed by a two second
		3.	Replace the system board.
pause, and the computer
beeps six times. Beeps		For systems with integrated
continue for five iterations		graphics, replace the system board.
after which the LED flashes

will continue until the problem is resolved.

Service Reference Guide, dc7600 390742-002 D–11