MPS+ Orch Problems

My MPS+ suddenly stopped working at the first octave of the keyboard, and the polyphany has been reduced to only 4 voices. Anyone out there have any insight as to what's causing this? Any solutions? Perhaps it's the battery backup. Thanks
JNE

I doubt it's the battery backup. This sounds like a job for EMU service department. You could always change the battery to see if it did anything but I'd bet against it.