A while back, I turned on my tower, it began to boot, and soon thereafter turned back off again. Confused, I attempted to turn it back on again, and it did nothing. I thought my power supply had gone, but have since had that replaced, and I'm not receiving any signal whatsoever from the tower.
How should I go about pinpointing the problem? Is there any way, short of having another tower to switch out individual parts with, to do so? Any recommendations would be much appreciated :)