put stick-on 'dot' lables on the bottom of the keys and that extra 0.005 inch made it work. didn't like that junky fix, so ended up replacing the felt strip on the after-touch rail with new, thinner felt to let the keys go down a c**t-hair further. Someone will get rich someday reproducing the rubb...

I cleaned all the gold contacts and rubber dots with 70% Isopropyl and used a different q-tip for each but there was no black residue at all. Will 99% make that big of a difference? I've removed and reinstalled the keyboard circuit board twice now and I don't want to have to open it up again unless ...

It's tough to tell if the problem is with the gold contacts, or the rubber dots. I also found this for reconditioning the dots:

http://www.chemtronics.com/products/pro ... &m=2&id=32

I think the issue is just the gold contacts aren't conducting very well. There appears to be nothing wrong with the mechanism. The contacts are are shiny but they could be shinnier. I have to admit I did a crappy job cleaning them so I went and bought some compressed air and cleaned them again metic...

I'll have to take a closer look at it when I get home in a couple hours. Another thing that makes me think it's mechanical is once I reconnected and screwed everything back together, I could get most of the notes to play if I pushed the keys straight down by applying pressure to the back part of the...

Mine has the carbon pellet silicon membrane. Looks exactly like in that video you posted. As I said I took off the membranes and cleaned the contacts just as in the video, put them back on and all the notes/keys played just fine when I reconnected the circuit board to the rest of the synth. It's jus...

From where I can see them they don't seem to be caught on the sides of the openings. It just seems like they aren't being pushed down far enough to complete the circuit. But I could be wrong...

I have become the owner of a Prophet 600 which has been in a box since 1987. It is having an issue with the key mechanisms properly hitting the keyboard contact strips. When I powered it on, only three of the highest far right keys worked so I opened it up and cleaned the contact strips then plugged...