It's like a windows blue screen of death. My MC-8 pretty repeatedly will freeze after a playing a little while. After it freezes, I can do one thing (change volume, turn off with front power button, etc.), but after that, it's frozen. Nothing can be done except turning off the main power switch on the back and "rebooting." Nothing comes up in the troubleshooting start-up sequence, but it happens again after a while. Is there a self-protection circuit that may be triggering? None of my amps are clipping, and I'm using balanced connectors out to some Crown 402's. Any thoughts? Really frustrating.