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Hello, my 50HUH5500-UA.CUSJLH LG TV has no pic no sound. I have standby 3.4v, the two pins above should be 13.3v but they are 7.08v. What is the problem?

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The Knight

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If you wish to get some details; check the site linked here. Pull up older posts. https://electronicshelponline.blogspot.com/
faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.
Screen-shots to defective LCD and Plasma panels are given. You can see and compare to that to your TVs', and can make sure about the fault to an extent.

Posted on Jul 09, 2020

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5 Related Answers

Tom Chichester

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SOURCE: I have a LG Plasma model 50PG60-UA and it won't

Power supply failure

Posted on Dec 19, 2012

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Sp Gupta

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SOURCE: Hw to fix lg tv cf 20D70 only standby light no sound no pic

Hi Anonymous,
Recently I have replaced the main board for this fault. Check the inverter circuit if you can.
Good Luck

Posted on Jun 30, 2015

gopakumarg43

The Knight

  • 76416 Answers

SOURCE: lg 47-lf11-ua tv turns on has sound and half picture stays on a few seconds then shuts off

Fault in the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit.Contact any service technician.If you wish to get some details; check the site linked here.Surf the site with patience.Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Posted on Mar 02, 2015

Anonymous

  • 1 Answer

SOURCE: loud pop...LG Model 50PQ30-UA Standby light blinks on/off

this **** dont mother ******* work **** ALL YALL HOES how u like that

Posted on Sep 20, 2010

Anonymous

  • 22 Answers

SOURCE: kdf-60xbr950 no pic or sound. standby light flashing

Sounds like the lamp is bad. Might be time to replace the TV.

Posted on Mar 31, 2009

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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
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There are several known issues that can cause that.

The top candidate is the main board, the next is the Y-Main board.

Here's a link for repairing the power supply board of LG 42PG20, which also contains a link to how to test your own board to see if it is good or not:

http://www.coppelltvrepair.com/p/716/lg-42pg20-ua-power-supply-board-repair-service

Hope this helps!

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