I do see two ribbon cables (similar to IDE controller cables with pin 1 painted red). They run from along the sidewalls of the case. It's hard to see how well they are connected, though. There is a green LED light next to them (both sides). I'm not sure what that is indicating. Should I pop the case off and make sure they have a good connection?
The PSU I am pretty sure on. I jumpered the main plug from green to black and it turned on. When I turn power on, it seems like everything is kicking on for a second and then it just goes to idle. I can check voltages, etc. with a multimeter. But I'm not sure what everything should be.