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Emerson 50" LED powers on then back off! HELP!

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Discussion in 'Troubleshooting and Repair' started by lukelona, Mar 8, 2016.

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  1. Mar 8, 2016 #1
    lukelona

    lukelona

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    Mar 8, 2016
    I'm very frustrated with my tv. It's only a year old but warranty only covers parts, which is only a couple dollars usually. Labor is couple hundred and I only paid $250 new.

    It turns on, displays Emerson then shuts off, within 5-10sec.
    This started about a month ago. I FINALLY ordered a new power board and installed it today. SAME THING HAPPENS!
    Now I'm out that money too! Rather than trying to repair a capacitor or something I figured hell, put a whole new board in it must fix it! I was clearly wrong lol
    Is there something else that would cause this? Or is it likely that I got a board with the same issue?
    I bought it on eBay, and it said it was new not used. I'm really irritated and would greatly appreciate any info that may solve my issue.
    Thanks in advance!
     
  2. Mar 8, 2016 #2
    Heliman

    Heliman

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    Feb 4, 2016
    The safety circuitry shuts the TV set down or will keep it from turning on when it detects a problem. There could be a problem other than the power board you replaced or even the computer itself.
     
  3. Mar 8, 2016 #3
    Heliman

    Heliman

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    Feb 4, 2016
    I forgot to mention that Emerson's have a lot of problems with there inverter boards that cause the same problem you described.
     
  4. Mar 8, 2016 #4
    cjdelphi

    cjdelphi

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    Oct 26, 2011
    The only possible inverters are in the main psu, it's LED driven

    I'd put money on one or several LEDs that failed behind the filter, did you by any chance set the brightness > 90% ?
     
  5. Mar 8, 2016 #5
    lukelona

    lukelona

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    Mar 8, 2016
    I'm not positive afar the brightness was on. Probably switched it depending on room light.
    Is it fixable if that's the case?
     
  6. Mar 8, 2016 #6
    lukelona

    lukelona

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    Mar 8, 2016
    I'm not a pro with electronic stuff. I don't know all the correct terminology lol
    Is the inverter board the other board inside with the hdmi ports etc on it?
    I only see 2 circuit boards. One I replaced and the other with video inputs in it.
     
  7. Mar 8, 2016 #7
    cjdelphi

    cjdelphi

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    Basically you need to locate the LED driver, test it's voltage, each model will house the led's differently but this is the kind of issue i think you have (edited, wrong vid)
     
  8. Mar 8, 2016 #8
    cjdelphi

    cjdelphi

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    Oct 26, 2011
    [​IMG]The video in my next post is more like your problem you describe.. (not the video in this post, although could prove helpful)

     
    Last edited: Mar 8, 2016
  9. Mar 8, 2016 #9
    cjdelphi

    cjdelphi

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    Oct 26, 2011
    Or

    P1



    P2

     
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