Hi Beackybird,
I think the problem your have is that the "tact" or "dimple" switch is gone again.( I1m sure you knew that) but if the 2000 is like all the other psr`s it`s not one switch but a "membrain" that has "dimples" on it that needs to be replaced. Sometimes a "tech" will try to "shim-it-up" rather than order a whole "membrain". In some psr`s that involes the whole KB , while others are sectional [ie style buttons]. In your case I would suggest that they replace the entire section that has gone bad (a shim-job is basicaly a cheap and temp-fix) On a KB the size of the 2000 I would think that the "dimple" switches would be sectional. But either way the part has to be ordered so ask the "tech" to check them all , some others may be on there way out . Sorry to haer about the bad times with the Y2K. That was my biggest complaint is that the build quality just is not there. It`s a great KB made bad and that`s a shame where else are you going to get what the 2K offers for a 1K price tag !
Best of luck my friend let us know how you made out, Take care
jedi