The monitor was "blanking" intermittently. When I would move it a little it would come back on. The problem progressed. Now, the monitor rarely comes on.
The video output to a different monitor works fine.
It DOES have the backlight inverter. I've shown a flashlight on it in dark room to test if I can see an unlit "ghost" image. I didn't see one.
I have checked to see if the video cable was plugged in "all the way" on both the monitor and the motherboard. It was.
The laptop has "dedicated" video and there were some overheating problems, but they are fixed now.
It was dropped twice. The video problems didn't immediately appear after either drop.
Windows 7, AMD Athon II dual core 320 @2.1 GHtz. 4 GB DDR3 8600 RAM (1066 MHtz). ATI Mobility Radeon HD 4250.
I figure it's either the cable (due to intermittent and progressively worse blanking) or the monitor itself. I believe I am able to replace either of those two parts. However, sellers will not allow me to return the part once I've installed it. Both parts are pricey and I don't want to buy a part I don't need.
Does anyone know some way to diagnose either the monitor or the video cable?
Edited by fatrap, 05 January 2012 - 11:31 AM.