Question about LG 42LC2D 42 in. LCD HDTV

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Low sound on LG LCD 47" hdtv

I have this new LG HDTV 47 " mounted on a wall, I have to turn the volume to the maximum, and I still can't hear the program correctly. Anyone with the same problem, any ideas what may be going on?

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  • May 11, 2010

    Are you using this with a cable box or satellite receiver?

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Alright, here's a few things you can check. 

1) As the clarification request asked, is there a cable or satelite box involved here? You may need to adjust the volume of this device seperately to recieve optimal audio.
2) If #1 is not the issue, you may wish to make sure that all your cables are properly and firmly connected. A loose connection could be responsible for this.
3) Try it on a different input. You may have a faulty input on your TV, in which case this would indicate a bad main board with problems in audio processing
4) If you're sure it's not your cables and cable box or whatever, you may very well still have a bad main board in your TV that isn't producing loud enough volume. Alternately, you may have speakers that are improperly connected or bad. 

If it is in fact a faulty main board or speakers within the TV itself you'll have to seek professional assistance to fix this if it's under warranty, else you'd void it out by preforming an unathorized repair to the system. If it's under warranty from LG still it shouldn't be an issue and parts/labor should be covered for this. 

If the unit is not under warranty to repair this you'll need to find either the speakers or main board assembly to replace into it. Ebay seems to have lots of misc parts. Google may also yield advice, or alterantely you could purchase directly from LG themselves. 

To fix a main board issue you would have to remove the screws holding the rear cover in place. There are about 20 of them, give or take. You'll want to take note of where they came from as some are designed to be screwed into the outer part of the casing around the edges. Those are the screws for the plastic sections, the thread is looser on those. The sheet metal screws have a tighter thread to them and are the ones usually located in the 'interior' of the rear panel. Also, remember to unscrew the tiny screws around the inputs. They also need to come off.

Now, once this is done you would need to remove the screws holding the main board assembly into the panel. The main board is the board with all your component inputs on it. It handles all your video and audio processing, really. Take your screws out, pull your connecters(Gently! Carefully! Do not accidently pull a wire out or you'll not be happy later, trust me) and pull out the board. Place your new board into the empty space and reverse the directions. However, I recommend prior to sealing up the back panel plugging in your power cable, turning your TV on and doing a test run beforehand. Just to make sure you've properly connected your stuff back up. It would **** to get that thing mounted back on the wall, turn it on and then realize you forgot to reconnect your LVDS cable.

If it's a speaker issue and you're going inside the back of your set, doublecheck your spade connectors and make sure they're tight. If the speaker is blown, bad or weak it should only be a few screws(2-4 depending on the interior of your model) and the two spade connectors holding it in place. Pull the screws, pull your speaker, detach the connectors, reverse to install new. 

Posted on Feb 21, 2009

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