Since installing Windows 7 (64 bit) on my 2010 Mac Pro (Radeon 5770) the screen intermittently flashes off and back on. Sometimes it'll go a minute without going black, sometimes it'll happen every few seconds. And it doesn't appear to be related to anything I'm doing-- it even happens when I do nothing. It's really hard to work this way, as you can imagine and I can't find any answers as to what's causing it.
Possibly relevant information:
Screen is perfect when in Mac OS. No issues.
Screen is perfect while installing Windows. It's not until it finishes installation that the the screen begins turning on and off intermittently.
Monitor is a Dell U2415
I've clean reinstalled twice.
I'm not sure how to reinstall drivers since the screen goes on and off every few seconds. It's like working blind.
Help!
Mac Pro, OS X Mountain Lion (10.8.5)
