If your screen displays an image with very low brightness, it is probably a simple bug in the backlight of your TV. A reset your tv may be enough to solve the problem. Turn off your screen. Unplug all peripherals connect (router, game console, decoder, …) Unplug it power cable from the wall socket. Wait 2 minutes and reconnect the tv. Generally, sudden power surges, overheating, and faulty LED bulbs can cause the TV backlight to fail. Cause of TV Backlight Failure. Possible Fixes and Prevention. Power Surge. 1. Perform a power drain by unplugging the TV, holding the power button for 30 seconds, and turning it on. 2. Next, slightly loosen the screws at the back of your display. This should stop the problem. Turn on the display to see whether the backlight bleeding has stopped. 3. If not, switch it off again and then take the microfiber cloth and gently rub the areas where the backlight bleeding appears; in a circular pattern. Normally, it is caused by no power. Please check if the battery dead or adapter (power supply) failure or even check if you have plug in firmly or with the wrong power supply. 99% the display will be back on. LCD has white screen – If a LCD has a white screen which means the backlight is good. Use a bulb that has a stark white color temperature and point the lamp at the back of the TV screen. Unshaded Lamp. And, of course, for those of us with no time for DIY projects, simply take the shade off a table lamp and place it behind the TV. We recommend an LED bulb with a stark white color temperature and a lamp that’s shorter than your A dark screen or black screen and a “buzz” noise from the bottom of the screen are common signs of inverter failure. Replace the inverter board with the expert’s assistance. 9. Fried Motherboard. Sometimes you face the Westinghouse TV black screen with no sound issue as the motherboard is damaged or it is burnt out. How do I lower the backlight on my Tv?What are the TV backlight options?What is backlight control on TV?Will a TV work without a backlight?Can you repair TV I have a Samsung LED TV model UN32EH4003F. When turned on there is a picture (seen with a very bright flashlight) and no backlights at all. There is sound, however. I've been trying to find a solution to this issue elsewhere online and the only thing that comes up is it might be the power/LED board (part BN44-00664A for this model). SSOqm.