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My LG55(55LD520) powers on, but no picture or sound. There was some sort of electrical disturbance that resulted in smoke coming from rear of set. What so you think the problem is? Bad board?

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I believe the problem with your TV is that it has one or more bad capacitors. I had a similar problem with my TV where it would power on and there was no picture. I took the back off of the TV and found that the two bad capacitors were bulging at the top. The capacitors provide power to the light bulbs. I bought two new, better quality capacitors and replaced the bad ones with them and the TV worked immediately. If you go to you tube you'll find videos that show step by step instructions on how to perform the replacement. All that you'll need are a soldering gun and solder and the new capacitors. I bought mine at but you may be able to get them at Radio Shack. The capacitors have the model number on them.

Posted on Dec 02, 2014

Testimonial: "Thank you for responding. i removed the the back cover and didn't see any visible damage to any of the capacitors, but there is a slight whiny, high pitch, fluctuating sound coming from one individual capacitors. Could it be the culprit?"

  • 2 more comments 
  • Christopher Thomas
    Christopher Thomas Dec 03, 2014

    "Thank you for responding. i removed the the back cover and didn't see any visible damage to any of the capacitors, but there is a slight whiny, high pitch, fluctuating sound coming from one individual capacitors. Could it be the culprit?"

  • protector606 Dec 04, 2014

    Yes it could be the problem. One of the capacitors that I replaced was hard to tell that it was bad and the other was bulging badly so I replaced both to be sure.

  • protector606 Dec 04, 2014

    Here is a youtube video showing how to identify and replace bad capacitors on an LG TV.

  • protector606 Dec 04, 2014

    Add a Comme



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That will be real expensive repair jobs, it can be from the power supply or from the backlight inverter circiuts. I would leave it unplugged.
It will cost too much to have it done at the repair shop, it is only 4:3 screen also. You may want to think about it first.
Please see my basic troubleshooting guide here:

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Capacitors kit: he can make you a set of caps.

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