Yeah, so apparently unplugging the motherboard cable did the trick. Thanks for your help though!
So, yes. The fans do spin, the DVD tray opens, and the mobo does beep with no ram. However, when I turn the PC on the fans blast full power and nothing shows up on my monitor. I've tried hard resetting and don't know what to do know.
Dell OptiPlex 9010 DT doesn't have any integrated graphics signal.