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I have a LG tv model number 47Ln5750-uh it has the stand by light on and when I turn the tv on it shows the LG logo for a split second then the screen goes back wounding if you may know what part needs to be replaced thanks Paul

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  • 8 Answers

1Check power board capacitors if swelled then replace them ,
2 check led output voltage at connector on power board. If voltage down come back from led penal then one or more leds fused.
Please replace it.
3 it may caused power board defective too.

Posted on Oct 01, 2018

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Posted on Jan 02, 2017

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gopakumarg43

The Knight

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SOURCE: LG smart tv model number 47LN5750-UH. No picture but have sound. When I hold a flash light up I can see the menu screen. Been told it's a driver...

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 Oct 26, 2016

richard berry

  • 11 Answers

SOURCE: LG 47LN5750-uh. replaced the main board. picture still blue, back lights are on but not picture. besides throw the tv in the ditch, what should I check next?

Either you have a bad panel or the T-con board is not processing the video to the screen. This is the board between the main board and the screen. There is one on E-bay for just under $35.00. Hope this Helps.:)

Posted on Apr 29, 2017

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Hi Grant,

This is a backlight issue. Defective LEDs in the backlight array need to be replaced. Welcome further assistance.

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Back - light problem? 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/
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