Tc Wang

any number can reach optima? the alarm is there already when I moved in, not sure who is installer

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?