wooops you have a optima noooooo !!!! not your fault horrible alarms id turn the power off on your fuse box and if the alarm panel completely dies then you need a battery or check all the fuses the battery one should be near where the mains is wired in now im not actually concerned its this so if the panel stays on when you turn off the power switch your fuse box back on if its still doing this high pitch noise i would check out the speaker and where its pluged in make sure no wires are catching it
let me know if this works
Death
Death
January 2010