I bought a fairly clean looking E-MU XBoard 49 on ebay - the price would have been great if there were no problems - it wasn’t much more than a parts one probably sells for -$60.
The problem is some white keys when pressed also trigger the adjacent black key and if that happens usually the black will trigger two notes also. It’s only on three of four pairs of notes such as in the lowest octave the F# and G.
What’s odd is it wasn’t doing it consistently. I played on it for a while before I started noticing it. Almost as if it went into a state that causes it rather than something mechanically an issue with the keybed. I took the keybed out and cleaned the contacts which leads me to my second question:
I’ve cleaned the contacts on a bunch of midi keyboards and never had the issue I’m encountering. The rubber nubs that hold the contacts to the board are really hard to get back in. I usually gently push them in with a thin steel rod that I sanded the tip so it’s as flat as possible with the edges smoothed. This time the nubs are much wider than the holes they go in and it takes so much force that I’ve poked through a couple. I stopped on the second and decided I better either buy new contact strips or figure out a way to lubricate the holes and perhaps find a better tool .
BTW, the keybed was fairly clean - I didn’t see any reason it would double up notes.
Thanks in advance for any advice.
PS. One other issue is the four button press to reset the keyboard to factory isn’t working.