elite-7 HDI problem

[salty pirate]

does anyone with elite-7 hdi have problems with the amplitude scope? the amp scope screen goes white when I get to about 100ft of water. I still get good readings on the screen when the scope goes out. the scope comes back on in about 90ft of water. I recorded sonar for a while and when played back the scope works at all depths.

I contacted lowrance and may send it in. they told me there is no known issue of that problem. why does it have to be like pulling teeth with these guys