Or touch screen as in
mobile phone?

I'd carefully remove it from the wall and check for a loose/corroded
connection into the cable back to the panel. If it's the flat
membrane type, it might be a sealed unit or might just be a flexi
folded onto itself. The latter will be cleanable but be careful of
any tracks that cross the fold and that might be where the fault is.
If everything looks OK, try it on a short bit of cable direct into
the panel, maybe you have had a little grey or brown furry visitor...

I've not yet looked at the instructions, but think it uses a three pair
telephone cable to link to the panel. So at least part of it is
multiplexed? All the LEDs on it seem to work ok and some of the function
buttons but none of the number ones. Every button should beep when you
touch it - now only those function ones do.

Next step is to remove it and have a look. ;-) ISRT having to add a
supplied IC to the main PCB when fitting the remote.


I seem to recall with mine that it was necessary to programme the main
panel to accept code from the remote.
Could it have lost its setting and need the code sequence re-entering?