MODEL-BIASI GARDA PLUS HE M110.32SM/E THE TIMER CLOCK KEEPS RESETTING TO 12.00[FLASHING] I RESETT THE TIMER-IT CAN LAST A FEW DAYS THEN GOES BACK TO 12.OO[FLASHING].THERE DOES NOT SEEM TO BE ANY FAULT LIGHTS SHOWING-WILL IT BE THE CLOCK OR COULD IT BE A PCB FAULT -ANY HELP GREATFULLY ACCEPTED