where (vaugely) do you live? where do you take your equipment for repair? how much did you pay? … and what did you have done? just curioous… thanks!
many years ago, i took a MC303 to the local shop that works on synths… I said “it wont turn on and the power suppy is OK and the power connection to the board is OK, can you help me?” they said… “sure, we can take a look at it” when i went back, they brought it out and said “it wont turn on but the power suppy is OK and the power connection to the board is OK too, so we cannot help you, you will have to send it back to Roland???” this expert opinion cost me $60 20 years ago.
I am in Ohio and there is a music repair shop in town that specializes in anything electronic. Had them resolder a jack in my CP-30 years ago and they have worked on my ART tube mic pre. Bench fee alone is $60 last time I was by, but they do quality work.