I built my own computer about 7 months ago and i come home and it shut off while i was gone. I go to turn it on and it wont boot. The power led comes on when i turn on the power supply but when i go to turn on the computer the fans spin for a second and then nothing. I hit the power button again and it does absolutly nothing but if i turn off the power and turn it back on the fans spin when i push power and turn off like they did before. I already tried the psu and i took it down to the barebones but still wont work. Any ideas?

Have you tried a different psu? Possible board problem.

It turned out to be a dead motherboard