PC kept shutting off on me. now won't even turn on?

[kidphoenix96]

do you think that it might be the motherboard?

 

[jimmy2o9]

do you think that it might be the motherboard?

I think it is most likely the power cord. You should try using a different power cord.

 

[kidphoenix96]

tried it still not working

 

[JogaBonito1502]

I would definitely try getting a hold of a PSU that you can test with. It could well be a problem with the 24-pin connector. If it's not the PSU, then I'm 99% sure that it's the motherboard.