Quote Originally Posted by LY34 View Post
yes all test have been on the water. Head unit does same thing on 2 different boats. For example I put the 997 in place of my 998 and it shows no SI or DI. Put 998 back on and it worked fine.
Try Pop N Cork's suggestion of removing any SD Cards ...
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Also ... If there is an AS SIDB Y cable and a shoot thru xducer connected to the unit ... Remove the cables and test the HDSI xducer plugged directly into the head unit ...

Rickie