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Lg 42lh30 Tv runs well for awhile 20 minutes to an hour, then a click sound comes out of just the right speaker. Then the TV freezes and none of the buttons work on the TV. Once I cycle the main power switch the tv will not turn back on, thought a red light shows that power is available. I did some minor troubleshooting and found when I disconnect the T-Con from the main board, I do not ever get the clicking sound, my buttons always remain functional, and the TV seems to run fine (I can hear the movies playing) though of coarse there is no picture just back light. So trying to figure out if its the T-Con or the main board.

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  • parrish sessler Sep 12, 2013

    Finally replaced T-Con...TV ran well for a day and half then sgar

  • parrish sessler Sep 12, 2013

    Finally replaced T-Conn...Tv ran well for a day and half but then started to act up again. Crackling/Popping out of the right speaker only, still present with mute. Then control buttons don't work and when I try to reset the TV by shutting power off it doesn't want to turn back on. I only get the problem to reset if I remove the power cable for like a minute. Problem is intermittent. Ive used HDMI 1 and 2 and coaxial all with same results. No obvious blown capacitors. I was thinking main board since the control panel and speaker plug into it, but I see alot of post about power supplies causing popping sounds, not sure if power supply problem causing popping sound to come from the speaker and just one speaker not both. Resold T-Con so only down a few bucks.

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As per your detailed description, the fault should be of its T'Con itself. Replace it. There is no adjustments to be done after T'Con replacement. If you wish to get more details about how to replace T'Con board to an LCD TV, check the site linked here. It has details with illustrations.http://electronicshelponline.blogspot.com/ Pull up previous posts there, either by type in the Brand name to your set in its search box, or view it in Mosaic / Timeslide / Flipcard option.

Posted on Jul 25, 2013

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was that capacitor damaged?

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power unit going bad

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SOURCE: Samsung TV won't turn on- trying to fix it. A challenging problem

I had the same problem. I live in NJ and called the local authorized "service provide" listed on the Samsung website. What a joke. Quoted $350 just to show up, never showed up. So I opened my own TV. Took off the plastic back (10 screws) took off the large metal RF shield (12-14 screws) and noticed a blown component. The markings on the component were KL15L and it is apparently an NTC Thermistor. Obviously it got fried and not knowing if there was other damage I decided to set out to replace the entire Power PCB Board Assembly and not the component. There were two part numbers on the assembled board (BN97-00457E & BN94-00622E). After searching online I also found a suitable replacement number for these (BN96-04896A). I found two places who claimed to have the part or have it on order (shopjimmy.com and vancebaldwin.com). After placing orders with both and having neither come through, I broadened my search and found out that the LNR409D was basically the same model as my LNR408D so I looked for its Power PCB Board Assembly part number which turned out to be BN41-00521B. Google search for that part number showed the item available on ebay. I bought it a week ago (ebay 260311519904) for $144 plus $12 shipping. I removed the bad board an hour ago (6 screws about 7 connectors) installed the new one, plugged in the connectors, replaced the covers, plugged in the TV... AND IT WORKS!
Suggestion: If your TV is out of warranty then open it up (what have you got to lose) and see if the problem is obvious and maybe something you can fix (replace) yourself. The parts, spare boards, etc. are out there if you look.

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Fujitsu
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I think you have problems with the digital main PWB.

If the power PWB failed, turn off and change the pilot ligth to red.

Posted on Nov 28, 2008

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