I'm running into this and issue and I can't peg down a cause. I recently updated my Vista HTPC to Windows 7. When booting up I can get into the OS, but the screen goes black shortly after.
I have tried two monitors: the Panasonic plasma just goes black and when I try Samsung Syncmaster LCD it looks like it's searching for digital, then analog sources.
I have an Nvidia 8400 GS card and I've tried both the 191.07 and 195.62 drivers
. I've also let Windows install the drivers after uninstalling the Display Adapter in Device Manager in Safe Mode.
When I start in Safe Mode I cannot recreate the issue. I tried uninstalling/reinstalling the drivers in Safe Mode.
Thanks in advance for any advice you can give.