Question about LG Televison & Video

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My LG TV 50LS4000 has a blue screen and audio and no picture. How can I fix it

Please help me figure out what part to order to fix the table

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  • Jennifer Schultz Venson

    I have tried this and still not working. Any more advice?There was a popping sound before it went out.

  • Thomas Gotwalt
    Thomas Gotwalt Dec 06, 2014

    Now you have to singleout troubled area. It may be due to video output failure or some input failure. Try to give some auxiliary input signal like from satellite receiver, DVD/Blueray player etc. If the TV works with any of these inputs, it will confirm that the tuner area of TV is defective and you will be saved from big expenditure. Otherwise output LCD video driver stage (which may be composed of some chip only or hybrid chip/electronic circuit) or LCD itself may be defective which would cause greater expense to repair. In either case, you will have to consult a qualified service personnel preferably oem personnel in order to save your expensive set from getting more worse by some unauthorised repair personnel.

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  • Contributor
  • 10 Answers

Blue screen is an indication of missing video signal input. Check all of your input video connections for any loose or broken wire/connectors.

Posted on Nov 27, 2014

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  • 2 Answers

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Posted on Jan 02, 2017

  • 16 Answers

SOURCE: LG hdtv lcd wont turn on will only go to blue screen

How old is the set.. If you its relatively close to being out of warranty LG will probably cover the repair. Contact them at 800-243-0000.

Posted on Dec 07, 2008

  • 187 Answers

SOURCE: TV powers on and the screen comes on for about 3 seconds...

Your mainboard is damaged, replace it and that will solve your issue.

Posted on Jun 06, 2009

  • 8457 Answers

SOURCE: LG 42LG50 42 in. HDTV LCD TV

Reset ur tv by unplug,replug it an hour later.Do the same with the digital box.Go to ur tv menu.Go to AUDIO setting,go down to reset,ur audio should return to factory setting,should have sound return.

Posted on May 04, 2010

  • 20 Answers

SOURCE: Blue screen, no picture, audio works fine. TV

I have the same issue. I am thinking I need to replace the T-con board. Did you get your fixed and what did you need or do?

Posted on Jun 03, 2010

salt56
  • 373 Answers

SOURCE: I have a Pioneer PDP-5010FD

You must be sure your DVD and PVR cables are hooked up right. For example, the DVD has an output of red and white for left and right audio and yellow for video. Look for the OUT connections with these colors on the back of the DVD player. Then on back of the TV find the corresponding colors on the connection that says VID1. There are many other connections but for our example use VID1. Then go to the menu INPUT and highlight video1 and the picture should come in. If it doesn't then you possibly have a signal board that is bad. The signal board is the one with all the jacks or plugs on it. Do the same with the PVR cables but use different input jacks.

Posted on May 25, 2011

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The t-con board controls the picture. To test it shine a flash light on the screen abd see if you can see an image when the TV is on. If you do then the T-con board is OK. Look at the back light ballast board (sometimes is part of the power supply board) If you see no movement or a dim picture with the flash light, then the T-con board is gone. You can get parts here: TV Parts Universal TV Stands DLP Chips ShopJimmy

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced.

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1 Answer

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Common problem and fairly easy to fix. 
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Screen shrinks and expands - may or may not correct itself after the TV warms up. After a few days, weeks, or months of having the shrinking/expanding problem you may loose all audio/video but the power light will remain lit!

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Check with the site www.TvRepairKits.com. They have built a kit to fix this problem.



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