Biffa

Looking around in other threads, with a person with somewhat of a similar issue, i think i can start diagnosing the issue. CYBERYOGI talks about how it is possible to burn out the cpu with overvoltage. Let's hope it is not the case. Will send photos of it assembled and disassembled

Hello folks. I am new here, so please forgive me if i mess up. My grandfather had bought my father a PT-20 when he was a teen. It is a very sentimental object to him. As he had been trying to get it back working a few years ao, he used a higher voltage adaptor, burning out (hopefully) a internal fuse circuit.. I hope on restoring the synthesizer, and gifting it to him on his birthday. Any advice? Will be happy to provide any resource that might help restore it.