Dual monitor playing games?

Monitor Shuts of When Playing Games?

• Let me give you some information... I've been trying to play games such as TF2 and Mafia 2 but about 20 minutes in my monitor shuts off. The sound is also repeating. My computer is still on and everything but the monitor just turns off. I've been playing games for about 2 years with this computer and have never encountered this problem. I downloaded CPUID but couldn't really understand what it meant and if it was bad/good... By the way, this is when nothing is running besides Steam itself. Here's the link for a screenshot: http://imageshack.us/photo/my-images/831/levelsp.png/ So can you guys please tell me what is wrong and how to fix it? Thanks so much in advance.

• Answer:

  I had a problem similar to this about a year ago. Took my whole computer system in to the computer store for them to check it out. They couldn't find anything wrong with it. I knew there was a problem, so I opened my CPU, removed the processor heatsinks and found them all clogged with dust and lint. Cleaned the heatsinks and the surfaces of the processors, replaced the heatsink compound and reassembled. No more problems. If your system is older than, say, five years, it couldn't hurt to check that or have it checked.