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My LG tv model number 42LN5400-UA no picture

When i watched tv and video games my screen would go black so i took a flashlight and went across screen and could see picture. the tv has sounds but there is no led lights visible behind tv.

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  • LG Expert
  • 330 Answers

It is a common problem for the LG 42/47 LN series LED TV, the problem is defective LED back lights strip (strips).

You have to open the display panel to find the bad one & replace it. The part number usually is printed on the strips, read 6916L-11XXA, you may purchase it from EBay.

Posted on Aug 11, 2017

Testimonial: "Thank You. This seems to be the right solution. I will look into this."

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6ya6ya
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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: power led blinks but no picture or sound

Had the same problem myself. Took some doing but I managed to find a service bulletin that I downloaded. The problem is with the siene module and all you need to do is unplug connector JP63A from the main board and your TV will work again.
Take the back off the TV (there are a lot of screws) and look on the left hand side of the main circuit board that is mounted in the center of the TV. You will see a small white connector that is labelled JP63A, simply unplug it. Plug the TV back in and let it reboot. That's it, should be able to watch immediately.

Posted on Mar 15, 2009

  • 34 Answers

SOURCE: lg 42inch plasma

Sounds like main board failure and or power board failure. You need to contact manufacturer and describe problem for tech support. Some of the parts in Samsung TVs have lifetime warranties. Change out of two board is about an hour job and service call is usually comped. Hope this helps. J

Posted on Apr 09, 2009

xptareq2000
  • 1447 Answers

SOURCE: lost picture on my LG 42" plasma model number 42PC1DV

it is problem high voltage unite problem (EHT) change it then solve your problem

Posted on Sep 03, 2009

  • 1039 Answers

SOURCE: Hitachi plasma screen black. blue light on... no picture though.

Replace digital board. Common for this set.

Posted on Nov 09, 2009

budmrtn
  • 11361 Answers

SOURCE: I have a 1 year old sanyo 42" lcd tv, model

You need to find out if the power supply is putting out 24vdc for the backlight inverter board, it can be that the inverter board has short circuits which will cause the 24vdc to go into shutdown to protect itself, you can disconnect the power cables to the inverter board to see if you will get the 24vdc back.

Posted on Aug 17, 2010

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