Accenta 8 Mini Alarm System?

We have the above alarm system which was working fine, last week when we entered the house my dad entered the wrong code several times until finally getting the right code and the alarm turned off. I then press the reset button because the alarm did not go to work next time. So when i pressed the reset button as i have done before, the tamper light came on and has stayed on ever since. For some reason the alarm has frozen and we can not do anything to get the tamper light off. Can you please help.
Natasha Dudnik, August 2006
try removing power from it. turn the mains off to it and remove all batteries. leave it for at least 10 mins. reconect batteries and mains. It should now be set to factory default.

anon, August 2006
link Click here to see other fixes for Accenta 8.