Had an issue start today with the DI on my 899. I had the 2d,Di and SI combo view going and the DI section of the screen filled up with horizontal lines. Tried switching views and each time a DI screen was up, the view would be correct initially but occasionally it would have the garbage across the center upon opening that screen but the lines would then start and fill the screen. You get the lines but you can faintly still see the structure of the bottom behind them and the image would pulse. I also noticed that occasionally it would clear and go to normal for about 3 seconds and then start over with the lines. Swapped it with my 898 to see if it was a transducer but the 898 worked fine and the 899 did it on the other transducer. The 2D and SI continued to work fine for the rest of the day.
I didn't have a card in it so I snapped a pic with my phone. The picture is taken right after switching to the DI screen and the entire screen will fill up.
Luckily it is still under warranty and I will be contacting Humminbird about it. I just wanted to check if there was a reason that anyone was aware of as to why it would do this but the SI was not affected.