Going to make a habit of whenever I fix something small, I'll just turn on the camera. Might be the one bit of information that someone else needs to solve their own issue.

Or maybe seeing this will give someone the confidence to buy a synth they know has a small issue!

Here is the eBay link for the chips I purchased : https://www.ebay.com/itm/324044735583

Not anywhere close to an expert, definitely not claiming this is the only thing that could be wrong, or the only thing that can solve your problem, just a quick look at one solved issue.