This actually just happened about three minutes ago, now I can only play in one octave unless I do manual input with my mouse, and I have to manually sustain the notes as well.
It was good while it lasted.
The broken octave buttons are what suck the most imo.
JellyTea
Maybe you can get it repaired or replaced if you still have the warranty.
Spurta
I'm lucky enough to have a place that repairs stuff like this about 19 miles away, but my plan is to get a larger (and better) MIDI at some point.
I probably have the warranty somewhere, though.
Thanks!