Electronics → Repair a Casiotone Mt-45

Hello guys, I need help for repairing my casiotone mt-45, so here's the deal:
The keyboard has two sections: the left side which is basically for the chords and the right keys which are for melody. The right side is not responding which is quite weird because everything else works well, but it produces weird noises coming from the speaker. Here's a video of my keyboard problems:

»www.youtube.com/watch?v= ··· bTN8oMb0

here's a guy with the same problem. »www.keyboardforums.com/t ··· 5.25752/ it was said it's only worth $5 so it's not worth it to get it repaired..

Twas painfull to watch the video, but bottom line, it looks like it's broke. Only suggestions are to take the batteries out for a bit and see if that makes it any better.

Considering the noise, if that started at the same time that the right manual failed, it's likely a processor problem. Fix would be about 3X the price of a replacement.

i want my 4 minutes back