Question about LG 47LG50 47 in. LCD HDTV
I've found most of the time the 24 V is intermittent or low. Most of the time i have found the problem is the feed through s on the 2 output transformers. I always solder all the legs on both transformers. I've fixed lots of these boards.
Posted on Aug 02, 2016
If you are losing backlight, then you can turn the lights off and use a small flashlight to see if you still see a (faint) image. However, the symptoms are consistent with a failing main power board (MPB). It has been my experience that neither the inverter boards nor the video boards cause intermittent failure as you describe (and I have only seen one set with problems in that area). Note that I just worked on my 100'th LCD a few weeks ago, so my experience is somewhat limited.
Posted on Jun 04, 2011
This problems it could be those 2 long LCD inverter boards are dead,so it is not giving ur tv LCD screen panel the backlight to produce a picture or the tv Tuner signal board itself is the problems it dead.That the board,that take in the incomming broadcasting signal wire ur case the HDMI or Component cables.Take out the incomming broadcasting signal to the tv,turn on the tv,now tv have no picture,it should have a loud white static picture noises for good more 5-8 mins,than problems it not the tv Tuner signal board.Than it is those 2 long LCD inverter boards are dead.Tries websites like Shopjimmy.com,Ebay.com to buy refurbishes 2 long inverter boards or the tv Tuner signal board for the replacement.
Posted on Mar 25, 2011
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Posted on Jan 02, 2017
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