Report "Hi,i own a lowrance 3300c chartplotter,a couple of weeks ago i wnt offshore and must have left the main swith turned on,a couple of days later my wife went to see if the boat was ok and there was an alarm sounding,the plotter had swithed itself on for some reason,i now have a problem,when you switch on ,an alarm is sounding and lights are flashing high and low,this does not happen all the time but most of the time,i have deleted all the trails because the machine was full,i have tried swithing off the anchor etc alrms i put on another power lead,tried another power source,the unit seems to work perfectly apart from this but it is annoying and i fear may cause severe damage. thanks john"