Question about LG 42LC7D-UB Television

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42LC7D-UB Shuts off

TV will stay on for around 30 mins then pops and goes off. I can unplkugg the set and then plug it back in and it will come on and then the same thing happens again. I have replaced part number EAY34797001. Not sure what to do next.

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  • 12 Answers

Re place the capacitor from the power supply of the t.v.

Posted on Sep 25, 2009

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1 Answer

LG 42LC7D turns on ok but no display or sound,tried using monitor out with another tv but no picture either


Check to make sure you have the right input selected for the input that ou have plugged into.

Jan 20, 2013 | LG 42LC7D-UB Television

1 Answer

LG 42LC7D-UB after few minutes the sound goes off and channel change by itself


When heats up, the supply voltage from the main power supply board goes less. Check all the soldering to this board for any loose solder terminals. Resolder all the suspected solder terminals by applying a little more solder. If it do not help you, replace the board as card basis.

Jan 09, 2013 | LG 42LC7D-UB Television

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LG 42LC7D-UB, Bad LCD Controller Board????


Steve, that was awesome. Thanks a bunch. I already have the tools and I can get the solder easy enough. Thanks a again. I went to Best Buy this weekend and all they could say is that the entire board would need to be replace and that they really recommended a new tv as the cost for the new board would be as much as a new TV.... :( typical of them!

Nov 10, 2011 | LG 42LC7D-UB Television

1 Answer

LG 42LC7D.......Have sound but no picture at all. Light goes from red to green and sounds as though the screen tries to turn on but no picture.


It sounds like you have a logic board problem. It is easy to fix open up your tv on the back and the logic board should be covered with a small metal plate unscrew the it, it uses small screws get the number of that board an order it through guytvparts.com is the cheapest

Apr 03, 2011 | LG 42LC7D-UB Television

2 Answers

No Sound, No Picture on LG 42LC7D


I do not have a solution but I have the same situation with my tv

Dec 27, 2009 | LG 42LC7D-UB Television

2 Answers

Cuts off


Most likely the power supply board.

Lie the tv down on a bed and unscrew the back. Its only about 9 screws around the edge and look at the power board, on the left, see if theres any burn marks.

I have a brand new board I bought the other day for the same issue but before I replaced it, stupidly, I checked with LG and turns out mine is still under warranty so I'm stuck with a new board.

Let me know if you want it. I'll match any price you can find online.

Mar 20, 2009 | LG 42LC7D-UB Television

1 Answer

Replace main board on LG 42LC7D-UB


not sure what you're referring to as a "main board", but heres the LCD Control Board for the TV

http://cgi.ebay.com/LG-42LC7D-UB-LCD-CONTROL-BOARD-6870C-0119A_W0QQitemZ150277759127QQcmdZViewItem

Mar 13, 2009 | LG 42LC7D-UB Television

1 Answer

LG 42LC7D TV does not want to chg channels after 5 min of use


There are some inductors that are out of spec. LG's original SB said to replace some of these with a jumper, but it only lasted a couple months.

You need to have the Total Main Assy replaced.

Jul 28, 2008 | LG 42LC7D-UB Television

2 Answers

Tv turns off after 15 minutes of use


For bobby11 and luis, it is the power supply. Part Number EAY34797001 in the 42" and EAY34796801 in the 32". This is a known problem, and somebody should start a Class Action against LG over this one. Part is available online and easy to swap out for anyone with the most basic knowledge.

Jan 16, 2008 | LG 42LC7D-UB Television

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