Seemingly Unfix-able Problem
I have a seemingly unsolvable problem.
I built a PC for a friend around six months ago, and it has been running perfectly well on Windows 8 (32bit) for that time. Recently, it has been randomly shutting down without warning in the middle of tasks, and then immediately rebooting. The other day he invited me round to upgrade him to 64bit windows 10. I did so by burning the ISO onto a disk and then re-installing Windows. This worked, for 24 hours of Dota playing and downloading (without any mysterious black-outs) until it suddenly switched off again. This time however, the computer would not turn on (so to speak). When power button was held down the PC would "turn on", albeit only with the power button illuminating and a green light on the motherboard but nothing else. No fans, no video output, no keyboard lights or anything. I've taken out and put the CMOS battery back in but that didn't work, and I'm utterly stuck about what it is. Any ideas?