Re: PC doesn't power up
Yeah, most likely a problem within the mobo. Check the connections. Clean off dust (if there is any) and make sure the psu is working correctly. Put the psu in a different comp and put a new psu in that old comp. See which works. If one works, then you know the problem. If neither of them works, then you also know the problem. It could be a bad socket breaker in your house, but, I highly doubt that.
Macbook Pro and Logitech z5500s. All you really need.