I recently opened up my computer to unplug the connector for the internal speaker, and after I did so my computer booted just fine and I began to play a game. Well about 10 mins in, the computer just shuts down. Bam. I press power, it begins to start up again, and just shuts down while loading Windows. I open it up, recheck all the connections, and I think they are all fine, reseat the video card, and start it up again. It boots to windows, then just shuts down. Next time, its just about to finish the bios check and it shuts down. This continues on, with it randomly shutting down somewhere in between the bios check and right after it boots to windows. What could be wrong?