Computer won't boot????

Bronson3304

Honorable
Sep 1, 2012
2
0
10,510
Hey guys, been reading for a while but this is my first post.
Ok so my problem is my computer won't boot up and I can not get into the bios.
I was surfing the web then boom blue screen. When it rebooted it flashed the bios screen for half a sec then the screen goes black almost like it is freezing up. But all the lights and fans are still running. Any ideas?

So far I have tried testing the psu with a paper clip ..... I have tried swapping out a hdd that I know is good. I have tried booting up with only one stick of ram in all combos. I have reset CMOS and removed the batt. When it starts up it goes as normal and beeps once then bios screen then nothing. It is a custom build and it was overclocked and running great, not so much any more????