Hi, this is the A3000 keyboard that I'm looking to repair.. it's in a very dirty state as you can tell. I got it from the previous owner like that ! Anyway, the plunger bottoms underneath are green just like those found on an A4000 keyboard. Some A500's have blue plunger bottoms, but the square hole is too large for the A3000/A4000 keys.
Cheers,
Utukku