I'm at a loss here. This started last summer, tl won't do anything. I have a 2nd boat with tl so I swapped them and still nothing. They both work normal on the 2nd boat. Humminbird support has done nothing to help and I've had 2 local techs look and both have no idea what's wrong. Has anyone else had any issues like this? Tl will pair just fine and shows up on the network.