I've had a JVC HX-C6 stereo for a few years now and i've loved it the whole time. Recently however, it has begun to turn itself off after displaying a "PROTECT" message on the front. I have tried unplugging all of the speakers, sub woofers, and antenna from the unit and the error still occurs. What could be the problem? Is there a way I can fix it without taking it to a repair center? Thanks in advance.