View Full Version : Corona PC-22 keyboard

August 17th, 2017, 12:12 AM
I have a Corona PC-22, dating from mid-1983. It was in use for several years, and then stored. I recently fired it up - the monitor and computer run and load perfectly - but only a few keys on the keyboard generate characters on the screen. Quite an anti-climax to a reunion with an old friend - many pleasant years were spent with the much-lamented MultiMate WP on this computer.

There was nothing wrong with the keyboard when last used. The cable with RJ14/25 connectors works correctly. I believe the keyboard is a capacitance type, and very robust. What would a tecchie do to test and revive this keyboard?