Hi, my house alarm (Honewyell Accenta G4) randomly set itself off and then when I silenced the alarm, the LCD displayed Tamper Fault Lock Out. I can now only enter up to a 3 digit code but they screen does not change, it just beeps. I have tried checking the box but that looks ok. I have tried removing the fuse and when re-inserted it trips the alarm (which my code will silence), the LCD has now got black squares across it and I still can't do anything with the alarm.
Any advice would be greatly appreciated please!
Any advice would be greatly appreciated please!