Thanks for all the work and 65 pages of post. I just bought an E5DSI for my little 14' boat and used it once and had several of the issues described in the first several post. Im use to my Lowrance global map stacked on top of a 100C color unit and was not impressed with the E5DSI. So I will play with the contrast and look at the white background as well as switching fro 455 to 800 Khz to improve picture quality. I also tried to manually input some GPS cords and it told me I entered them wrong and needed to fix them. So its off to GPS coordinate converter to fix that issue. May go buy a 2gb micro card for screen shots if I get the other issues fixed.