optima xl4 microprocessor. since powercut ive no sound when i input my code. have tried to test alarm, no sound. have tried internal siren and outside siren no sound. have brought new battery as suggested still the same. panel is working ok, zone lights come on, but no sound. someone suggest fuse (where is the fuse). please help anyone.

del, February 2011

I have had the same problem.I removed fuse [it was ok ] replaced it and everything was ok. Fuse located on right hand side of panel small black handle pull out.

John, March 2011

fuses inside panel

gts, February 2011