Blank screen after computer is turned on

I have a Compaq SR2173WM w Vista. Everything on it is standard specs for that model. After I installed the virus protector, AVG 8.0, I have had problems with the screen being blank after the computer is turned on. I have taken everything out and checked all connections to make sure nothing is broken or loose. Occasionally it will show on the monitor and everything works fine. Then when I turn it off, the screen may not come back on for the next dozen or so times I turn it on. Then suddenly without warning, the screen will come on.

Anyone have any ideas?

 

From your description I imagine you need to deep six, uninstall AVG 8.0. On an XP Home system I run AVG 8.0 on I keep getting AVG file errors in the Master File Table, and a run of chkdsk from a command prompt deletes them. Hope you can work through it, the family still marvels at the wonder of Windows, but they don't have to deal with it's maintenance, I Love Linux, and to think that if MS wouldn't have released Vista I may have never strayed away.