First I noticed my back door latch was not locking so I figured I'd disconnect the negative battery cable to see if it would reset. Unfortunately the only thing I accomplished was my radio completely blacking out. I checked the radio fuse which looked good but replaced anyways. Still nothing? Disconnected the battery over night and only thing I noticed was the knob light came on for half a second and again black screen.I did some research and a site suggests removing the hard drive to see whether it's the hard drive malfunctioning vs a fried the mother board. I guess I'm just seeing if anyone here has any suggestions, I'm assuming the worst but thankfully I kept the stock single disc player for back up.