If they try to say it's normal for the backlight and picture issues when the tv comes back then you can refer them to the loan set having none of the issues thus ruling out LED as the problem and having a strong case to say that the tv is faulty no matter what they try to say. Step 3: Dispose of the CCFLs. Next, I needed to carefully remove the CCFLs from the metal holders. I needed to be extremely careful because each of the lamps contained mercury. This also meant I needed to dispose of them properly and responsibly. Connect your Samsung TV to the Internet. Press the Menu or Home button on your Samsung remote. Select Settings menu by using the Samsung TV remote. Find Support in the left panel and select it by 6. Damaged Backlight. Your Samsung TV is illuminated by its backlight. However, this backlight is prone to outages, as some Samsung users found. When the backlight is damaged, your TV may suddenly become very dim. In some cases, only part of the backlight may be faulty, leading to certain areas of the screen dimming. The LED backlight zones in full array and edge-lit TVs are significant as they enable the manufacturers to implement a feature called local dimming. It allows TVs to control the backlight on a scene-by-scene basis. So the TV can turn off LED backlighting in parts of the screen where it's supposed to be darker while keeping other parts lit. This Samsung QN50Q60TAF TV keeps restarting no matter what I did but after doing some basic troubleshooting I was able to get it going just by taping the rib .

samsung led tv backlight problems