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I have sound on the TV but no picture. It was working perfectly fine before I left for work. Came home to turn it on and the screen is blank but can hear the sounds.

Posted by Anonymous on

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  • Televison & ... Master
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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://electronicshelponline.blogspot.com/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should troubles shoot. Contact any service technician. The circuit will differ with models and versions.
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

Posted on Apr 14, 2015

  • Anonymous Apr 15, 2015

    Thank you! :)

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  • Master
  • 372 Answers

Most likely a bad capacitor or resistor in the power board not allowing the screen to function.

$1.20 in parts, several hours of diagnostic work to find it, and an hour to fix it usually.

You are probably better off buying a new TV if you can't fix it yourself as the cost will be higher than it's value.

Posted on Apr 14, 2015

  • Anonymous Apr 14, 2015

    Thank you. We are getting it looked at tomorrow as it is still under warranty.

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SOURCE: 42" LG RZ42PX11 Plasma - rainbow lines on whole screen but sound

hi there.its likely that the lower y-drive panel has died.this is a very common problem with this model.the easy way is to remove the panel from the set completely,power it up and you should be greeted with the top half of the picture.this means ic failure,usually the bottom one for some odd reason.not replaceable unless you have the gear,these ics are available from dalbani(nikkai)for those interested.be extra careful with the four ribbon cables when removing/refitting.damage to these writes off the display panel.hope this helps somewhat,regards,steve.

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It is most likely the power supply. If you see domed caps change them using a higher voltage cap. If it's 1000uf at 15vdc put in a 1000uf at 25 or 35 vdc. If this helps let me know.

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SOURCE: Blank Screen but sound works on samsung HPS-S5053

Testing by FixYa Staff

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SOURCE: lg lcd tv screen goes

I had this problem on my 42" Philips. Just got it yesterday and worked fine on the tv stand. As soon as I mounted the TV to the wall via wall mount system, I had the exact same issue you did. Figured it out today.

The wall mount was putting pressure against the center of the back of the tv (tv set had a slightly rounded back plate, and the mount was a flat plate). As soon as I put spacers (part of the wall mount hardware set) between the wall mount braket and the tv so there was no contact except at the mounting holes, the tv worked fine.

My theory is the pressure pushed the tv back plate against some board components which caused them to overheat (no air flow); or put pressure on internal connectors. I dont know.

Hope this helps, may not apply to your situation.

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Ur Video converter board is dead,need a new one.

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