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Optima XM alarm system, Strobe Light?

Have old XM alarm system and lately have had couple of times the strobe light activated without the alarms being triggered. Any ideas what could be the cause.
Alan M, October 2010
Wiring short?
Duff panel output?
SAB going into failure?

Take your pick.

Alarm, October 2010
link Click here to see other fixes for Optima XM.