The other day I got so pissed off with Vista I formatted my new Acer 9302 laptop and installed a copy of Windows XP 64-bit. Ever since then whenever I leave the laptop for a long period of time (say 15minutes+), I come back and the screen is all black, as if it has powered down.
I can see the laptop lights still on and moving the mouse the screen lights up, but all there is there now is a slightly lighter black. I have the power settings set to never turn the screen off and to not do anything when I shut the lid but the problem still continues.
The only way I can fix it is by holding down the power button and restarting the laptop. It has only ever done this under Windows XP 64-bit, 32-bit Vista never had these problems.