No e-manno its not an old optima, Council's buy the panel's for council houses but there Horrible panels,cheap, Out of 47 years experience I've never come across one on a job, only seen one at my niece's house Never touched/played with one, cheap crap
If you've replaced the battery Then try stretching the Tamper spring in the panel, if that fails take the battery back get a new one, if that fails then it's days must be over
you could say " oh well it may be another tamper problem" but if it started after removing the panel lid then Its the panel tamper. Peace
Nick
April 2013