SH-201 Buttons not working (how to fix)

[GVC]

Hello everyone,

First of all thank you for your help beforehand, I have looked around the internet and cannot find an exact answer/help for this even though I'm sure it has been talked about before.

My SH-201 has a few buttons which suddenly stopped working, to be more precise they are the Octave up button, the Preset button and Number 7 button.

I do not have any experience with fixing synths at all but I am up for giving this a good go.

Could any of you guide me into how to figure this one out? It would be very much appreciated

Cheers
G