I am having the same problem, vertical blue and green lines. Model number is UN65KS8500FXZA. I sent a private message to SamsungLarry the mod who has been advising people to PM him for similar problems. Hoping Samsung does the right thing here... I've been a loyal Samsung customer for many years (washers, dryers, TVs, cell phones...) - they've always seemed to be a high quality brand.
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