My 587HD Di, the DI works like it is supposed to. The Maps and GPS work correct. The fish finder screen is white except a dotted line for the bottom and if a school of bait fish goes by it will show a few dots shows no orange or green no fish i have changed some settings even hit the factory default setting no change. This unit is only a few months old was working just last couple of times went out it stopped if it is out of the water it will put orange on the screen. Thanks Cub48