I have had 2 instances where my 3500 EM screen has gone from normal to lined to dark in flight. The system will still feed engine data to my 4500s, but the screen goes totally unreadable. It worked fine for several flights between the two incidents. I removed the box and it is working fine on the bench now. Should Ii send it in for a check out? I think I attached two photos of the screen.

Thanks
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