Question about LG 42LC2D 42 in. LCD HDTV

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LG mod. # 37lc7d

I'm a servicer unaware of the modification you spoke of. This set belongs to a friend of mine with the same symptoms. Warranty has expired as he did not hang it up for use til recently. Can you tell me technical procedure for the fix?


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Posted on Aug 20, 2008

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Hi have a 42LED5510-tb the screen turns off intermittetly when on for 2hrs to 3hrs. I have contacted LG service 2 times and both times they said that the tv has a 3 year warranty wait till the problem gets...

Hi Mario,
Since your unit is under warranty period, don't ever attempt to open the back panel because it will void the warranty. Give proper ventilation on the back panel, keep away all obstruction from the vent to allow sufficient air flow. This will avoid trigger the over heat temperature sensor from the processor which caused the subsequent shutdown. If the symptom still persist, inform LG service center that the symptom already got worst :-)

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This is a main board issue and will need service.
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Jan 19, 2010 | LG 37LC7D 37 in. LCD HDTV

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Can you still get modifications done on these?

yeas you can i own on myself i take mine to radio shack in AZLE TEXAS our i have my cusin up grade mine with stuff but yeas you can also go to a game shop and ask then too

Dec 16, 2009 | Microsoft Xbox Console

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Green specs in dark areas on my LG - 37LC7D tv. After being on for a while, the green specs disappear. How can this be fixed and is this building up towards other bigger problems?

Most likely it is the LCD Panel causing this and it could get worse. The only fix is to replace the LCD Panel and if it is out of warranty it would be too costly. We are talking replacement cost of $900.00 for the part its self.

Dec 02, 2009 | LG 37LC7D 37 in. LCD HDTV

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We have hdmi cord connecting our comcast box to our Lg hi def tv. we get video, but no sound through the cord. we cant get the sound and the picture at the same time

Make sure that the cable box set set up menu has the sound selection as HDMI. This is needed especially if it is a Scientific Atlantic Cable Box.
If this does not correct the problem, call LG Customer Service to get a local Service Facility to take a look at it.
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Oct 21, 2009 | LG 37LC7D 37 in. LCD HDTV

1 Answer


Do not keep forcing this unit on - - This particular unit has a VERY commonly known problem and there are at least five tech bulletins from LG explaining this and other symptoms for the failure. In a nutshell there are coils that have to be removed and replaced with a jumper wire. This is not a repair you want to tackle so please get some experienced help for this one. A good technician will look-up the bulletins and educate themselves on the manner of the repair.
Almost all of the symptoms that can happen are intermittent and can be extremely difficult to verify. For this reason make sure to discuss with the technician that he replace all of the coils listed in the bulletin not just the ones causing your particular problem. Here's a list of symptoms that these defective coils cause, taken right from the bulletin:
1. Channels Or Menu Functions Scroll On Their Own
2. Remote Does Not Function
3. Tv Randomly Powers On And Off On Its Own
4. Dead
5. No Backlight

Hope this helps!
William Rayburn, CET
Premium Technologies

Aug 03, 2009 | Televison & Video

2 Answers

Buying 37 inch LG TV

yes this is a good unit i have one

Nov 17, 2007 | LG 42LC2D 42 in. LCD HDTV

1 Answer


This set has a modification that needs to be done. It will also start turning on by itself and changing channels rapidly. It's two weeks old. Take it back to the Retailer or if that is not an option contact LG at 1-800-243-0000 to get a local servicer in your area.

Aug 18, 2007 | LG 42LC2D 42 in. LCD HDTV

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