I've recently just started having an issue with an original trolling motor mount 360 unit that I've been running for years. Lately I'm noticing my screen will gradually become darker until the point it is completely unreadable. Even stranger, when I lift the trolling motor out of the water and drop it back down into the water, even if only for a second, the picture immediately becomes clear again. I don't even mean fully lifting it out of the water and stowing it, I mean just enough to get the head of the 360 out of the water and then immediately dropping it back down. However it will gradually darken again until it's unreadable. So in order to use it I have to constantly lift it out of the water and drop it back in to get a clear picture.
My only thoughts are perhaps water intrusion is mixing with the acoustic oil inside the head, and maybe the movement of raising and lowering it mixes the oil & water back up and as it begins to settle the image goes dark again. Very bizarre.
Has anyone had this problem or have any recommendations on trouble shooting it? I really need the unit the next several weekends for tournaments and would prefer not to send it in at this time.