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I have an lg ru42px11 plasma tv and the sound works but there was just a pop and the picture just went out. What boards would I try to trouble shoot with?

No picture at all. All black screen but I do have sound and the channels via cable box can be changed

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  • LG Master
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Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Posted on Dec 24, 2016

  • Robert
    Robert Dec 27, 2016

    Is also possible it could be the top and bottom y buffers? This is what I replaced the last time this happened

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