Johnny forgot to mention that this set up was working fine for the past year. It started with these issues two fishing trips ago. I live in Hawaii and the water is real deep, eight miles out the water is 1000ftms. Where I took the picture I was in 6o ftms of water, moving less than 5knts and in the past I always had a clear picture of the bottom and it would always plot on screen. (regardless what the range setting was) The left side of the screen is LF and the right side is HF. As you can see i get some garble on the LF but the HF shows nothing. It's an airmar B275 chirp xducer. I have noticed that as of late the unit had a difficult time displaying the depth in the lower left had corner.
Kicker, I actually did everything you mentioned in your post prior to my last trip out, with the exception of disconnecting the orange wire. Will disconnect the orange wire and try again and let you know what the status light does. I will update everything to the latest software while I'm at it.
Thanks again,
Jeff