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I have an LG 20LS7D flat panel LCD TV. Sound is on but no picture. The problem was intermitent but now nothing but sound. Help

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Possibly th emain board needs to be replaced actually you need to check some voltages first but with just a sincere guess signal cba

Posted on Sep 26, 2008

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Posted on Jan 02, 2017

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We only have sound when watching TV. Nothing else, like Wii, DVD player, etc. has sound. All inputs have video but no audio. Please help! Thank you.


The 2 long board that call LCD inverter board.Change these 2 long LCD inverter board.U will get ur picture back.The 2 LCD inverter are dead that why u not getting a backlight to get a picture.Tries websites like Shopjimmy.com to buy the two refurbish LCD inverter for the replacement.

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Intermitent black screen with sound, blue screen-no sound, normal


Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} You can try a hard reset: Unplug TV from AC mains and remove all cables from TV. Wait about 30 minutes and replug to AC power and redo the cabling. Switch on the TV and see if it works..



Good luck...

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if this is a lcd flat panel the invertors for the backlights have failed

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If this is a flat panel LCD tv, this is a sure sign that the panel itself is bad. I have seen this before. Tv comes on works fine then within 5 minutes goes blank.

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If you are still getting Sound, then most likely the bulb has burned out, (If you have a Rear Projection set). If it is a flat panel LCD, then the problem could be the electronics that power the fluorescent bulbs in the back of the LCD panel. Those bulbs will last about 10 years or so, but the electronics, (like the balast & amplifier), could have died. Please check your Cust Service Manual that came with the set & look for your symptoms, and that should help. Either way, a qualified TV tech will need to check it out.

Jan 17, 2009 | Televison & Video

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Power light for tv turns on but no picture and no sound comes on tv i have a 50 inch phillips plasma


Check your cables and TV input settings.  Can you get to the on screen menu?  Does anything appear on the screen when the tv is on?

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1 Answer

I have a 6 month old LG LCD 42" flat panel tv that, from time to time when we turn it on, will have sound come on but no picture. The status light (on/off) turns green from red. Since this has...


A lot of these sets have a software upgrade that can take care of intermittent power on issues, check with the LG website and see if there is noe available for your model set, I have seen this solve these problems numerous times

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No picture but has sound


My LG TV
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