Of it's a hkc bell it is led. No risk of high voltage from the strobe. The piezo will be though.
I'm seeing a trend of people wanting to remove proper stuff and asking how it can be disabled. Never see the same questions on simplisafe and ring etc. That's because they can be easily disabled. If you want a burglar alarm that can be easily disabled just get a doorbell and hope it's pressed.
Industry backed and controlled cyber security scheme rather than cyber essentials which isnt particulary relevent to our industry and controlled outside of it.
CySPAG Registered Installers | CySPAG
A decent quality battery would be an improvement but if it's not been serviced correctly and on time the psu is probably shot. You could try power cycling it but at least put a decent battery in it
Assuming same power supply the 0v is the same
tr is just that and isto inform the pnal of tamper from the bell. Diff bells report/detect different things
testing should be clear when in normal state, should be in alarm when attacked
Put your meter on ac volts
Pos probe to 12v dc
Neg probe to good mains earth
Check reading with mains on and mains off
Ensure meter isn't in current probe position