I have had one for years and years and today was actually the first time I ever fired it up. Having a problem with the keyboard. When it boots to Basic, the break key, Shift B, and Ctrl K are the only key combos that seem to be recognized and they only move the cursor down one line. When I go into the diagnostics, ram and sound pass, but the keyboard doesn't recognize anything, including the above key combos. Not sure how it would recognize at least some kind of keypress in Basic, but absolutely nothing in the keyboard test.
Anyone have any initial thoughts? I took the back off the keyboard being careful with the ribbon connector and don't see anything visually bad on the keyboard controller board.