Monitor losing signal and now computer turning off.
Ok so here is the deal. I built a new computer. It's run great for roughly two months with no issues have been loving it. While playing Tuesday my monitor went black and the lost signal and went to sleep. A buzz also came from the speakers. I restarted and after that the monitor keeps doing the same thing. I swapped graphics cards and it ran perfect for a night now it's doing the same thing. Now my computer is shutting down randomly also. Could anyone give me an idea where sto start looking for the problem?