I have an FL8-SE, and the other night I had the transducer in a hole and it was working fine. I went to drill a new hole and the motor seems to slow down, and all that was on the display was two lines, one red and one green, flashing on and off. I messed with the battery terminals and that did nothing. an hour later my buddy messed with the terminals and it was working fine again. Used it all day yesterday and this morning with no problems, and then it did it again. Now I can't seem to fix it. Any ideas on whats causing this?