If there is no improvement when altering the settings as suggested, then the problem may be the actual LEDs used for the screen backlighting and the LED strips will have to be replaced or perhaps the Chroma chip on the tcon board is faulty. You could always purchase a TV LED backlight tester - examples only and test whether the blue tint is 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, unlike Step 1: For the third solution, go to the back and locate the ports of the HDMI cables that you will need to remove the HDMI cable. Step 2: Sometimes, as you can see, there is an extension and that extension fails very often, which could be the problem, replace it. Step 3: Try plugging the device directly into the TV. If that’s the case, here are seven quick and simple solutions that might do the trick: 1. Adjust the Display Preset Modes. Press the Menu button on your remote to highlight a list of settings on the TV. Navigate to the section labeled ‘Picture Mode,’ ‘Display Mode,’ or simply ‘Mode.’. This section has preset modes with labels like LED TV screen has no light and no picture, but the sound is fine, how to repair LCD TV or LED TV LED Backlight Driver Circuit in this situation. LED TV Repai For testing, I use a feature on my TV that provides a solid white image. This most prominently shows the issue where certain zones of backlight are dimmed/off. The feature can be found by going to Menu (button) > Picture > Color Calibration > Calibration Tests. From here, select Flat Test Pattern and set it to 100%. Disconnect the power from the TV and restore all the connections between the boards, then disconnect the mainboard from the power board and then reconnect the power to the TV. The backlights should turn on full intensity and stay on. If they blink or don’t stay on then there is a problem either with the power board or the backlights. Most Helpful Answer. bakhtiyar.badar that will depend on what these dark spots look like. It is possible that this is a bad backlight array, LED covers that have come off or a bad signal etc.. Remove the TV from power by unplugging the TV. Remove all video inputs. Hold down the power button for 30-60 seconds. Follow these steps to check and disable the energy saving mode: Using your LG Smart TV remote control, press the “Settings” or “Menu” button. Navigate to the “General” or “System” settings. Select the “Quick Settings” or “More Options” option. Look for the “Energy Saving” option and select it. The power board supplies the voltages needed by the backlight. Of course there is a possibility that your backlight LED array has failed or you have some loose cable. You have to check this out by removing the back and measuring the output of the power board. If the power is supplied but the backlight turns off, it's the array. ul6G2.