Need help with emprex lcd model lm-2203

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  • newbietech11
    Member
    • Feb 2011
    • 16
    #1

    Need help with emprex lcd model lm-2203

    I need help please ......my emprex lcd screen turns off after a couple of seconds ...i tried the flashlight trick and you can still see the image..i did research and it might be my capacitors..im not sure though..i did a visual inspection and none of them are swollen or leaking...i dont have a multimeter so i cant do a power test ..i provided pictures of the 2 boards ...i am here to learn so any person or technician with knowledge and experience please guide me in the right direction of this repair ...if there are other necessary tools or parts that i need please tell me ...any help will be greatly appreciated thanks
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    • retiredcaps
      Badcaps Legend
      • Apr 2010
      • 9271
      #2
      Re: Need help with emprex lcd model lm-2203

      Originally posted by newbietech11
      my emprex lcd screen turns off after a couple of seconds ...i tried the flashlight trick and you can still see the image..i dont have a multimeter so i cant do a power test
      1) Since you can still see the image with a flashlight this implies your logic board is working fine.

      2) Bad caps can cause 2 seconds to black.

      3) You will need to buy or borrow a multimeter to check the inverter transformer secondary pins.

      4) You could have bad ccfl lamps and/or ccfl wiring.

      See post #13 and #14 at

      https://www.badcaps.net/forum/showthread.php?t=10419

      for details pertaining to all the above.
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        Comment

        • Rtech
          Badcaps Legend
          • Jul 2010
          • 1095
          #3
          Re: Need help with emprex lcd model lm-2203

          As retired caps as stated,a common fault can be that one of the Inverter transformers has failed,and usually a resistance check on the Secondaries of them,would quickly confirm if that is the case(suggest photos of the underneath of the Power Board may help,if you do not know where to measure.
          Should they not be faulty,then you have to decide if the fault is on the board,or the lamps and associated wiring.The easy way to decide this is by using a 'test' set of lamps to plug into the board,replacing the originals in rotation,to determine if it is the lamps causing the problem,and identifying which one/ones are doing so,or by sustitution of the Board.
          If you have neither a meter or test lamps,and finance has to be minimal,then you will have to..beg,steal or borrow(according to the song),one or the other,but preferably both.

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