On 24/10/2019 10:56, Dave Liquorice wrote:
On Thu, 24 Oct 2019 10:44:28 +0100, wrote:

If there was no alternative I'd try to replace the "keys" with momentary
switches but I'd prefer to keep the membrane if possible.
Has anyone here successfully repaired membrane keypads? If so, how?

Why is the membrane failing? Breakup of the outer surface due to use
or just intermittent contact? For the latter you might be able to
open up the membrane and clean the contact faces.

See if there is suitably sized third party replacement. Assuming it's
a simple X/Y contact arrangement. Might have juggle connections
around to get the pinout correct.


The problem is that some keys need very hard pressure or "jiggling" to
get a contact. When I've previously tried to fix similar things (TV
remotes) by cleaning the PCB it's always been a short term fix,
presumably because of a lack of conductive "stuff" remaining on the
membrane. I'd prefer to try a repair because of the printing on the
membrane and, as it's a common problem, I was hoping that someone here
might have found a long term fix.