PC wont boot

[supremor]

So I'm at a loss here, pc was running fine till like 2 hours ago then I got a bunch of random reboots then a random shutdown and now when I try to turn it on the fans and drives spin up but i get no picture on my monitor and then a few seconds later the pc shuts off...

Specs are:
C2D E6600 (was oc'd but i reset bios and cleared CMOS after the random reboots)
Gigabyte G41M-Combo board
4GB Transcend DDR3-1333
Gigabyte HD4870 1GB
2 caviar blacks and an older cavier SE16 for drives
Seasonic X750 PSU (bought this in preperation for my SB build before the P67 fiasco was announced)
W7 X64

I have no idea what could be causing this and why it started so suddenly. Kinda looks like a motherboard problem but this is a fairly new board I got only 2 months ago to replace my old P5B Deluxe that died on me while waiting on SB...

 

[Numenorean]

Well....Motherboard, Power Supply, Video Card or CPU lol.

Hard to tell really. I would normally suspect power supply but it seems like you have a new one. Do you still have the old power supply? You could try hooking it up to see if it powers everything on.

Unplug the hard drives and everything else not critical to the system. Only have your CPU, RAM, Video plugged in and see what happens.

 

[mlc]

... as suggested.. I would try another/older psu to rule that out.. as that is a likely culprit....

if that doesn't do it.. then i would pull out the board , and just try posting with the cpu/hsf, a single stick of ram, and graphics card... to rule out a bad connection or short between the board and case.....

 

[supremor]

Well after unplugging all my drives and reseating the ram I got the pc to boot again and so far no random reboots or anything. Gonna go play some call of duty and see how it goes if it doesnt make the pc crap out id say im golden
funny tho how reseating the ram seemed to do the trick even tho i havent touched anything inside the case in over a month.