Korg Forums

Hi Paul, if properly diagnosed and IC1 assigner MCU is found dead then I think you can purchase a replacement IC from a few sources or perhaps online. If D8253 timer IC is bad it would also be easy to replace and are pretty cheap, but without a scope it will be hard to determine. In that case, I ...

Realistically speaking, those are rather expensive. I've lost patience many times but I've resurrected 2 broken poly-61's so far. You just need to be patient and understand how it works. take it one step at a time.

well, if the battery was changed to a coin cell and you know for a fact that it was working well after it was changed. your problem could be cause by a few things, if you haven't gone in there and touched any connectors. 1. bad rubber contact strips (under the keys), I've been had by that one! 2 ...

Have you checked for battery leakage? damaged traces can cause many deceiving issues. Are the cluster of notes detuned? check how many voice LEDs on the voice board come on when you press 1 key. Oh, and are the clusters occurring anywhere on the keyboard or only specific area?