I GOT THE HUMMINBIRD SWITCH WHERE YOU CAN USE 2 TRANDUCER ON ONE UNIT BUT NOW IT WANT SWITCH TRANSDUCER HOW CAN THIS BE REPAIR OR WILL I HAVE TO BUY ANOTHER SWITCH ANY TROUBLE SHOOTING WOULD BE HELPFUL OH I UNPLUG BOTH WIRE ON THE SWITCH AT THE SAME TIME NO CHANGE ON SCREEN DONT KNOW WHICH TRANSDUCER I AM USING SO GIVE ME SOME HELP PLEASE.bangheadbanghead