I have a optima xm6, it is keeping ringing after a power cut.
there is only power led showing, none of mode or zone led is showing
I have tried code ####, not work
I have tried reset to factory settings in a bid to cure problem but still no change.
I have tried to enter engineer mode, it does not work
I have disconnected the battery-power off-poweron-code ####, still not work.
can anyone advise me how to solve this problem without call out an engineer?