Hi Guys, thought I'd update on the status.
Ordered KP, while waiting for it to arrive the screen (power) on KP gone completely so it wasn't responsive, basically dead. When new arrived, upon swapping - nothing changed on the new one, i.e. as if there wasn't power going into it (so I think it might be something on control panel all along). I did however managed to trigger the control panel and alarm. With effectively no KP to turn it off, had to pull the battery and fuse out and few wires in the bell to shut it down :(. So, regrettably, will have to go with full replacement as was suggested before :).
I am sure this has been asked many times (so don't shoot), but any advise on general approach:
1. Buy something (wired) on my own and ask installer to install it.
2. Go with what installer recommend (I think they use Pyronix)
3. Just go with wireless DIY, e.g. ring etc ? ?
Thanks for advice.