One morning my pc wouldn't turn on after running just fine the night before so I did some research. I believed I had found the solution, the power supply. I RMA'd the corsair power supply, got the new one, and plugged it in. Still nothing.
Then I started troubleshooting the system piece by piece. Unplug a component and see if it works. I got the HDD and optical drive unplugged and the fans spun up for just a second. I had bumped a cable. I touched the cable again and the fans spun up again. I pushed the cable into the connector just to make sure it was secure and the system spun up and stayed running.
I shut it down, reconnected the HDD and optical drive, and powered it back up. It worked. I used my pc for a couple hours then shut it down.
A couple days later when I tried to use it again it will not power up. I check the connections again, still nothing. I remove everything but the mobo and cpu, still nothing.
I did double check the pins and made sure all of the connections were solid. I should have added that the suspect cable/connector is the 24 pin slot. Both the connector and the cable are in perfect shape and I pushed it into place as hard as I was willing to to make sure it was a solid connection.
I will try breadboarding it, if it still fails I will pick up a CMOS battery and try that. Does the battery have to be a certain one or would any CR2032 work?