So, This is a recently built computer (2-3 weeks) and it was working fine before school, After school I noticed it was on the logon screen, So I guessed it had restarted itself. Although when I logged on it worked for about 5-6 seconds then failed and crashed. I suspected it did this because of my motherboard shorting with the case, this was happening when I first built the computer. But I checked the cardboard I used to hold the motherboard off the case and it's fine. Now, It will not start again, It's not the CPU. I Don't want to know whats causing the problem since I suspect most will say the Mobo, I just want to know how to troubleshoot the problem, so I know for sure.