Thin red horizontal line also. Had tv for 3 years. Contacted Samsung they tried to do basic test. Didn’t work. Then agent tried to offer me to but a new tv. $1500 for this one. See a lot of comments with same issue. I usually like Samsung also but really, 3 years? I’ll move on to Sony
The amount of people you see complaining about it is really a small amount when you compare it to the overall number of people that probably bought the product. Keep that in mind for all purchases - Further more, stuff breaks sometimes you have to repair it. It's not going to last forever most televisions only have self life of about 3-5 years. Have fun with your sony.
