tulpatechno

I've had a similar this morning, but not that its freezing. It's been working fine, but now when I turn it on there's nothing but static. Everything functions as normal, but I get a background static hum that gets louder if I play audio/programed notes. I flashed the firmware, re-seated the batter, am charging even though it should be good, and still happens without an sd card inserted. Not sure what else I can do, but I think this has happened to me once before. Any help is appreciated.