Used Korg M1 electronic keybaord/synthesizer/music workstation NOT WORKING!!

You are bidding on a used Korg M1. This unit does not work. It turns on when powered up, but there is a weird hum on the outputs and it seems to have lost all the preset sounds. I'm not sure what is wrong, but I figured someone could fix it or at least use it for parts. Please feel free to ask any questions.