To determine if your TV backlight is broken, you can use a flashlight to look into the backlight.
Here are the steps to check for a broken TV backlight:
- Turn off all the lights in the room.
- Use a bright flashlight and hold it one to two inches away from the TV screen.
- If you can’t see the image, try changing the HDMI input and seeing if you can get a signal. If you still cannot see anything on the screen, the problem may be with the backlight inverter or the power supply board.
But if you see a light beam coming through the backlight, then the backlight is burned out and should be replaced.
However, if the TV backlight is defective, it can also cause the screen to appear dim or completely dark, indicating a potential issue with the backlight.
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