Computer boots and freezes

Simppapro

Reputable
Jul 4, 2014
1
0
4,510
Hello. I have just built my first computer. I installed windows 8 and everything worked. Suddenly the computer froze. I booted it and tried to fix windows but the computer always froze in the progress. I tried booting it without hard drive or disc reader. Now when I boot it the power button light stays on for a few seconds and then turns off. The monitor shows only one picture. Still the the fans keep working. I might have a virus, bad motherboard or a bad power supply. I'm thinking about buying a 4gb ram stick instead of using the 8gb stick.

My parts are:
Motherboard: Z87-k
CPU: intel core i5 4670k
RAM: 8gb 1600MHz 1.5v
HD: 1tb
GPU: gtx 770
PSU: corsair cx 750w