Yesterday, my computer was working just fine; I was playing a game of Warcraft 3 and all of a sudden, my monitor goes black and says "No Input Signal". I check the connection, and the cable is just fine. Afterwards, I decide to reboot my computer, but this did not help. In fact, my keyboard stopped responding as well (The caps/num/scroll lock lights did not light up when i pressed those buttons). As for my mouse, I cannot tell, but it probably does not work as well.

I have no idea what's wrong, so any help at all would be MUCH appreciated. Thanks!