hi, slight problem with my optima xm alarm. Sorry if im hi-jacking this post but my alarm wont turn off. the bell on the outside is flashing with no sound. the unit on the inside (panel) is sounding with just the power light light on. please help!!
Sounds like the panel has lost power and internal battery is u/s and panel has reset to factory settings? By removing the lid you have activated the tamper circuit. On replacing the lid putting the code in should be enough to silence it. Try some default factory codes like 0123, 1234, 7890 etc. Problems continue post on here again and I will see what I can come up with.