My JVC TH-C3 Home Theater system DVD player is locked up. I turned it upside down trying to hook some wires recently and then it locked up. None of the 5 disk drawers will open and it will not produce any sound when on DVD. The tuner does work OK and the sound does come from the speakers for radio. I was able to pull the disks out, but that made no difference. There are no disks in it now. Any suggestions?