currently I used 17" LCD screen.
I play game (war craft), and at the same time I run IM such as skype and YM.
The problem is, my display suddenly blank (while I'm in game) when IM popup come out. It should be go to windows (normal) but right now nothing happened, just blank and then shut down.

I thought it should be PSU problems, how about you? Mind to share something to solve my problem?

nobody try to solve my problem? I think I need to go to any computer shop to ask or ask someone who really know how to solve this problem. Thx for your time.