My old Gateway started going blank at random, usually inconvenient, times. Went out a bought a new Lenovo.
Well, I was setting up some data collection software on the old Gateway running Linux. Over the next three days put quite a few hours into it before thinking, this hasn't gone blank running Linux.
Booted into Windows and had the problem repeat itself. Never happened under Linux.
You may have a driver conflict. Never figured mine out just did a re-install of XP and still haven't had problems again.
If it hadn't been for going blank I'd not have bought the Lenovo and could have added another gun to the safe.
All the Best,