I have the same issue on my 75" model code UN75MU800D at Software Version T-KTMAKUC=1250.5. Vertical lines that are light bands across the screen with various severity. I did a remote support call. I had already attemtpted all the things the support tech asked me to do, but did the procedures again. They are sending a repair tech to my home from another state. That causes me great concern. We are in Tennessee and a tech has to come from Virginia. Is this a problem across the Samsung line. Several of the people I work with are now experiencing this on their sets of all sizes, and now our industrial models at my place of employment are starting to show the same issue. This started out as a small amount of vertical lines I could live with, but the problem has increased in severity over time, on a TV that has a low amount of hours of usage. After trying everything including a full reset, I decided to call support today. What is the typical fix for this so I can share with the support tech if he is at a loss for how to proceed. Also, whill I get a replacement TV while they repair this one? I have never had trouble with a TV in my life. This is the first problem I have ever experienced with a television. It is also the first Samsung product I have purchased. I hope customer service is important to Samsung. I also hope end user experience is taken serioulsy. This is very disappointing to make a very big investment in a product that fails so quickly. The feature set, quality of picture, product integration, etc. cannot be beat, but availabilty, reliability, and a problem free experience is just as important to me, as well as others. I hope Samsung makes this right. Thank you for your help.
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