On Fri, Dec 10, 2010 at 8:46 AM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
I think this thing uses the well-known Keytonics cpacitive keyboard.The
foam pads under the keys can fail with age (resultign in non-working
keys), also the metalising on the back of the lower plasic disk can
vanish (!).
Patrick Sch?fer has suggested a different material for repair of Lisa
keyboards, the metal-foil-like wrapping from a crisps/chips/fries
pack. I have not tried this yet but I am collecting the packaging.
Patrick also describes a handy Lisa keyboard tester.
http://john.ccac.rwth-aachen.de:8000/patrick/KBDtester.htm