My 2016 Honda Civic has a display that flashes on a cold start. The dealer did a cable reset but that didn't work. I called Honda America and was told to have the dealer call their tech line. I'm still waiting to hear back from my dealer. Here is a video: https://youtu.be/g4QVaaRWjmc.
You're not the only one. I've read about this happening to others and a few of them had their system replaced. If your dealership can't fix the screen problem they may have to order you a new one.
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