Roland JD-800 Synth Repair - Deals with many repair issues and how to fix those
by Eric
(Philippines)
One of the most helpful videos you would come across, and a rare one too coz you really don't find people who take so much effort to explain stuff on keyboard / synth repair.
The issues that are shown and diagnosed include:
Dead keys Clanking keys Missing weights Bad buttons Jumpy sliders Battery replacement Velocity stuck at max value
He has even mentioned the spare part numbers, which he ordered from Roland to fix the issues.