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55LH40-UA won't turn on t all

LG 55Lh 40-UA won't turn on t all NO POWER

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

eagle338
  • 4889 Answers

SOURCE: My LG HD TV Model

Please let me know how many times it blinks in between each pause so that I can tell you what the problem is.

Sai.

Posted on Dec 12, 2010

Terry Corrow
  • 10875 Answers

SOURCE: I have a LG 55lh40-ua it turns on for a few min with picture and sound then the picture goes black and the sound stays on...any ideas on what board needs to be replaced? thanks in advance

the main power board is bad ,,order a new one and replace it,lay it down face down on a table,unscrew all the screws on the back,lift back off,there are 3 boards,1 has the hdmi inputs on it,the other is skinny and the last one where the power cord plugs in,is the power board,find the sticker on it and write down the s/n and then go to ebay and find one,then unscrew it and when the new one comes,replace all the wires and securely screw it down,replace back and screws and check it out,,,,

Posted on May 14, 2015

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1 Answer

Tv will not power up and turn on. does it have a reset button


no your modell does not have a reset button .
it is probably a faulty power supply unit
George

May 01, 2016 | LG 55LH40 55 in. LCD HDTV

1 Answer

I have a LG 55lh40-ua it turns on for a few min with picture and sound then the picture goes black and the sound stays on...any ideas on what board needs to be replaced? thanks in advance


the main power board is bad ,,order a new one and replace it,lay it down face down on a table,unscrew all the screws on the back,lift back off,there are 3 boards,1 has the hdmi inputs on it,the other is skinny and the last one where the power cord plugs in,is the power board,find the sticker on it and write down the s/n and then go to ebay and find one,then unscrew it and when the new one comes,replace all the wires and securely screw it down,replace back and screws and check it out,,,,

May 14, 2015 | LG Televison & Video

1 Answer

LG model 55lh40 no picture no sound


check your standby voltage and make sure it is coming up standbys come from the power supply board and if they are present your main board is bad or the main power supply is not working

Nov 27, 2012 | LG 55LH40 55 in. LCD HDTV

1 Answer

Horizontal lines shadowed / blured picture after 20-30 minutes


There are some semiconductors or capacitors that are leaky. Might need thorough check up inside the TV.

Jul 07, 2012 | LG 55LH40 55 in. LCD HDTV

1 Answer

I have an LG LCD 55LH40 tv where the screen went black. My directv was doing some kind of reboot because we had a power outage, bad weather, and it restarted and the tv was on and the screen said the


Good day..

that problem is cause of bad inverter board or T-con board..

If you have backlight the problem is T-con board..if no back light the problem is inverter board..

Hope it helps..

Jun 13, 2012 | LG 55LH40 55 in. LCD HDTV

1 Answer

LG 55lh40 tv will not turn on. I REPLACED THE POWER SUPPLY BOARD AND IT STILL DOESN'T WORK. THE STAND BY LIGHT IS RED. WHEN I PUSH THE POWER BUTTON IT MOVES FROM CENTER TO THE OUTSIDE AND BACK TWICE...


Only a probe with a voltage trace can figure to the possible SHORT in the circuit board. You need to look for possible signs of heating which can be an indicator to a short . Also check for the secondary +B to the circuit, check the path that leads to the drive and see if there is high potential drop, if so check the drop to get an idea of the short. The list of probabilities can be more and so ONLY a good voltage check can pinpoint the case. Take consensus but do not replace board at high cost with just assumptions.

Oct 22, 2011 | LG 55LH40 55 in. LCD HDTV

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