On Tue, 8 May 2012, didier@aida.org wrote: > - The keyboard is almost dead. > > > > I guess that the problem with the keyboard is dirt and oxide accumulated > with the years. > > > > Last time I switched it on, only a few keys were not responding > > Now only a few are responding. > > > > Any advice on how to remove this dirt and oxide on the keyboard without > breaking anything ? My preferred procedures for cleaning Commodore keyboards (in the order listed): 1) Clean the contacts with 91% isopropyl alcohol. (91% because the water evaporates with the alcohol.) 2) If that doesn't work, use a non-abrasive pencil eraser to clean the contacts. 3) If that still doesn't work, polish the contacts with 1500 grit sandpaper. This is obviously a last ditch attempt to revive the contacts. This works particularly well with contacts on game cartridges. You don't want to do this too often. 4) Redraw the circuit board traces with a silver conductive pen. This is expensive. I have only had to resort to this once. Also with Commodore keyboards, the hollow silicon rubber contact on the underside of the key shrinks with age. You can put a piece of soft eraser stick inside the rubber contact, so that more pressure is produced when the key is struck. wlevak@sdf.lonestar.org SDF Public Access UNIX System - http://sdf.lonestar.org Message was sent through the cbm-hackers mailing listReceived on 2012-05-10 05:00:31
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