I seem to have my share of Terminals that have bad keyboard parts. 3 that I'm working now have the same type of Keyboard. These are Hazeltine 1500 and ADM 3As. These have an molded base with fingers that stick up and a second square piece that slide into the base and makes and breaks the finger contact. It also has a square opening in the top for the key cap. So when someone drops a heavy object on the the key board this intermediate piece cracks in the corners and binds in the base. What I would like to find is a doner type of system that does not have any value so I can rob the middle piece.. (typewiter) ??? Tandy (Archer) sold a Alpha-Numrtic keyboard that said it was made for the TI 99/4 computer. It used the same switch type keyboard. - Jerry Jerry Wright g-wright at att.net