I will try my best to make this make sense. For a couple weeks I have noticed that when I'm on the front deck of my aluminum boat, I hear a slight..tick...tick...tick...tick. I could not find any cause to this, noise, and thought maybe I had a pin hole leak somewhere, but could find nothing. Every now and again my screen will stop reading the depth, and stop returning bottom contour, and have a messy screen with 100' depth or so, temp still works. I noticed today just playing around, that the ticking sound comes from what sounds like the transducer and only happens when the display starts to screw up. If I turn the unit off, the ticking sound will stop. If I turn the unit back on (and if it works like it should) no sound, the second it starts messing up, ticking sound comes back. Any suggestions? Do I need a new transducer?