Furuno radar 1621 do not show targets

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This tip applies to all VX2 radars from Furuno. Models Include 1724c, 1734c, 1824c, 1834c, 1934c, 1944c, 1954c, 1964c, 1724cnt, 17234cnt, 1824cnt, 1834cnt, 1934cnt, 1944cnt, 1954cnt, 1964cnt, and 19XXBB series black box radar processors.When the picture is "crooked", "rotated" or "needs re aiming" you need to do the radar heading alignment. In order to do the radar heading aligment, you must access the installation menus, available only in installation setup mode.
Press and hold "MENU" during power on.Continue holding menu during start up, at least until the boat appears.
Choose , "Installation Mode", Choose "Menu", "System Configuration", "Installation Set Up" "Radar Set Up".

Here is where people get lost! Choose "Next Page", Choose "Heading Alignment". You will be prompted to place the dotted line on a target "dead ahead". Follow instructions and then, do not forget to press "SET". Press Return Return Return or Menu to exit and resume normal operation.
Note that the installation menus disappear if they are not accessed for five minutes!.
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That is all there is to it.
Please "Optimize Radar Video" in same menu (Radar Set Up).
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