65" 2018 Q9FN brightness issues in dark scenes - Samsung Community
Samsung 55'' TV display problem? [Images of it] - Samsung Television - iFixit
An app is not working on my Samsung TV or projector
6 Most Common Problems With QLED TVs (Explained)
Samsung QLED 65" Q8C 2017 - Samsung Community
Solved! - Samsung Screen problem, can it be fixed? | Tom's Guide Forum
Q90T DSE.. Never had problems with Samsung TVs until now, what a shame for the price. They're taking the TV from my home in 2 days, I hope it will be better :
Fix for Samsung TV color lcd display problem - YouTube