Hey everyone- total noob here. Got an old arcade box from my brother in-law. Had a JAMMA hook up so I figured the best plan would be a xxx in 1. Installed a new power supply and everything looked good (5.2 and 12.0 on the multimeter). Got the Pandora's box delivered and hooked it in-- worked for a few minutes (joysticks and buttons did not) and coin slot wasn't hooked up yet. Removed the JAMMA hookup. A few minutes later hooked it back in and there was no video (using the VGA to a 19" monitor). Still get sound but just a grey fade on the screen. Any thoughts? I've tried different cables and a different monitor. Is the box fried?