CrossRoads:
I guess we have something different. I think ours is full 88 keys and weighs a ton as I recall. Very nice piano action feel, my wife learned to play on it for several years until she decided she needed a real piano for the more subtle feel a real piano offers.I think it's this one, I got it used at Guitar Center quite a while ago.
http://www.studiologic-music.com/sl-990-pro.htmlWhat kind of parts are on the electronics board?
The SL-990 doesn't suffer from the same case design flaw that the SL-161 does. The board in the SL-990 is nearly identical to the SL-161's board except for the Micro-Match connectors on the 161 are only 16 pin, and the 990 are 20 pin, this is to accommodate the larger matrix required to pick up input for the extra 27 keys.
The difference is: the SL-990 has a great case that doesn't flex, the SL-161 has a terrible all plastic case that flexes when picked up without perfectly even weight distribution. The flexing of the SL-161 case causes the control board to flex and components on the board break.
I could repair the boards, but I have something different in mind for these keybeds.