No, actually, that sounds like a completely different problem.

The original poster in this thread is seeing the player software crap out and get restarted, whereas you are seeing a user-interface lockup. Nothing in common there.

My guess for your particular problem is that your hard disk is probably having troubles. When the IDE driver starts the "error recovery" go around, everything else locks up. If you can get it to happen on AC power, you'll see log messages out the serial port for it. But if you only see it on DC, then perhaps the player is getting too hot for the drive(s). I have one drive here that is much more temperature sensitive than my others, and produced the same behaviour until I swapped it out into another device.

If your player is still under warranty, then perhaps the Empeg support folks ("David") might be able to help.

Cheers