Question about LG Televison & Video
I was watching it and all of a sudden the picture went black. The sound is still working. The TV has picture using the flashlight test, and I am trying to determine if the power supply went out, or if it is the LED strips. I haven't had any problems with the TV in the last three years and all of a sudden I have this problem. Thanks in advance
If you already tested with the flashlight which is the first step in the blank screen with sound fault then you have to test the LED Backlight supply voltages if your are familiar and good in the electronic repair. First you have to check if bulging capacitors for the LED Backlight drive voltage circuit, replace them. If capacitors are good then you have check the backlight LEDs. The flashlight test proves that the power supply is good and TV is working fine because the sound is ok and picture is fine. Attached videos and links may help you for the repair and replacement of backlight LED strips or LEDs itself depending on the type of LED strips used in your model. https://www.youtube.com/watch?v=Z1DEkSguWtg
Posted on May 10, 2017
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Posted on May 10, 2017
Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
Posted on Apr 26, 2017
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Posted on Jan 02, 2017
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