LED LCD TV screen backlight problems are getting increasingly common. As we know, slight voltage change can have a big influence on TV function.
So you need a useful tool which is called LED LCD screen backlight tester.
With help of this tool, you can know the LED LCD screen backlight problem quickly .
Testing the backlight of LED at any size Display the voltage, It can be tested in a long time, and will not damage the lamp beads .
If you are used to test the LED finished lamps, please disconnect the power supply before! Because it is likely to form a loop, resulting in abnormal test!