LG 37LG30 37 in. LCD HDTV Logo
Jacques Roy Posted on Mar 19, 2016
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My LG tv don't power on...

The power cord is goog... The fuse is good...

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The Knight

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  • LG Master 76,851 Answers
  • Posted on Mar 20, 2016
The Knight
LG Master
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Joined: Oct 14, 2010
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Fault to the main power supply regulator section. 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. Surf the site with patience. 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.

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Look at the power supply board inside the set (follow the power cord inside to it) for caps that look puffed up and are bad like these.
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