Method 6: Replace Backlight LED Strips. Before I started, I mentioned that this issue is caused mainly by a backlight problem. If you have tried all five troubleshooting approaches and it still didn’t work, you would have to perform a hardware fix by replacing the backlight strips. Method 7: Contact Samsung TV support. Reducing the backlight intensity might help reduce the visibility of the patches. Perform a factory reset: Try performing a factory reset on your TV to eliminate any software-related issues. Be aware that this will erase any personalized settings and stored data on the TV, so make sure to back up any important information before proceeding. When the backlight is broken, it can cause a dark shadow on your TV screen. If this happens, then you need to replace your TV’s backlight bulb. This is one of the many reasons why you can experience this problem. In certain situations. Most modern TVs have up to 50 backlight LEDs and if a few of these are broken, they can cause a dark screen. POV: You’re watching Ted Lasso, and you can’t help but notice the picture on your TV seems unusually dark.Why does your Samsung TV keep dimming?Your Samsung TV Keeps Dimming due to the Ambient Light Detection function, a contrast imbalance, or maybe a weak signal.Turn up your brightness setting to 100% or turn the Energy Saving Mode off to help improve the dimness. Remove the set from any cabinetry or environment that prohibits or limits the ability of the set to cool normally. 2) Enter the Menu and access the picture in the submenus to change the picture mode and reduce the brightness. 3) Reduce the backlight or Change the picture setting or Change Smart LED (Note: All 3 functions are available in J If your Samsung TV is flickering in one spot only, then this is a sign of a backlight problem. As most modern Samsung TVs have the backlight voltage inverter on the Power Board, you can use a multimeter to confirm that it is powering your backlight, although in my experience, voltage inverter problems show as an entirely darkened screen CCFL Backlight Assemblies for 22.0" Samsung LTM220MT05 Monitor Repair CCFL Backlight Assemblies for 17.0" Chunghwa CLAA170EA10 5 Wire Touch Screen for Bally iVIEW 6.2" Hitachi #TX16D11VM2CCA LED Backlight Replacements for 46" AUO T460HVD01.0 Commercial Grade Display 74.46P06.001-4-DX1 Adjusting the TV backlight. Open the gear or menu button on your LG TV remote. Select All Settings. Go to the Picture Menu. Select Picture Mode Settings. Hover to the Backlight menu order under J11TH.