Optima XM alarm panel

[Manny1]

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I have an old Optima XM alarm system in my house in which has worked fine for over 20 years. Recently when I was trying to set the alarm to go out, the buttons on the keypad were bleeping as I was trying to set the alarm, but the alarm wasn't setting. A little later I would try again and sometimes it would set but then not be able to unset it.
I know its old but can anyone give any useful advice please, apart from just get a new one

 

[UNG]

Not worked on an Optima XM for many years and I'm trying to remember what keypad type it has. Some panels have rubber keypad buttons that can be lifted off the PCB and it is then possible to clean the PCB and the back of the rubber buttons with methylated spirit or isopropyl alcohol once reassembled it usually works ok again

The other problem could be the battery they need to be replaced every 4 -5 years I don't know how often you change yours

 

[Manny1]

Not worked on an Optima XM for many years and I'm trying to remember what keypad type it has. Some panels have rubber keypad buttons that can be lifted off the PCB and it is then possible to clean the PCB and the back of the rubber buttons with methylated spirit or isopropyl alcohol once reassembled it usually works ok again

The other problem could be the battery they need to be replaced every 4 -5 years I don't know how often you change yours

I actually have never replaced the battery!, The buttons aren't the rubber one's it is like a flat surface.
They beep when you touch them, but won't set the alarm, and if it does we struggle to unset it when we get in