Sweet. Good tips. I think I did it right, she works like new!

I've gotten inside, it's FILTHY. I vaccumed out all the dust and particles. I took off this layer, its the rubber strip between the part where the bottoms of the keys and circuits meet, there is a lot of grime and c**p I cleaned off. Can I use alcohol? Damp rag? I need something moist to get it perf...

Yeah this is my first one. It's built like a tank, I like it!
I'll open it up and see if there is anything obvious, keeping fingers crossed its an easy fix.

I just got a Yamaha DX21 for a screamin' deal. It however has about half dozen keys that are not triggering, and a couple you really have to pounce on to play. Do the triggers get old and dirty? Or go bad on these? I'd like to open it up and try n' get it fixed.

Thanks!