Vertical black line

I updated to pie one week ago... Everything was smooth till today... My phone hanged... I had to lock and unlock ... After I did that...

Vertical black line

I updated to pie one week ago...
Everything was smooth till today...
My phone hanged... I had to lock and unlock ... After I did that... I had a thin black line one the right of my screen... Sometime my phone opens apps without I pressing something... When I type... He types 'm' constantly without I press 'm' ... I already did a factory reset... But no solution! It is really annoying!
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