1843c radar with Navnet VX2. Is scanner or screen faulty. Attached is a screen shot of the display and a photo of what is ahead of me , note the breakwater. Have gone through set up to try and resolve. Have checked connections at base of mast but not at scanner, any advice welcome. Plotter is working fine so suspect it’s not a screen issue. Adjusting gain on sea and rain, And pulse strength etc makes no difference.