Computer won't power up

[mike478]

I have a custom built pc, not by me. It was booting up and I accidentally bumped the front and it powered off and won't power back on. This has happened before but while troubleshooting it fixed itself. I suspect a loose connection, but I have no idea what I'm looking for when I open up the case. Any help or direction would be much appreciated.

 

[Proximon]

List your parts please.

My first suspicion would be the video card, followed by RAM. Next would be the tiny wires connecting your power switch to the motherboard.