philips 42mf521d/37 no picture - confused. :why:

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  • techmadman
    New Member
    • Feb 2013
    • 3
    • usa
    #1

    philips 42mf521d/37 no picture - confused. :why:

    hello all i have a philips flat panel lcd tv. the unit just lost display no noise or pops. i have replaced both the lcd inverter main board and slave board as well as power supply, main board (video card) and t-conn board. main board was questionable so sent it back and got replacement with new. so all parts in tv have been replaced and are new, still not picture. if the tv is plugged in and you carefully and slowly unplug the lcd main inverter board the lcd screen will flash. but no power lights come on or anything. any ideas would be greatly appreciated.

    i just don't know what else to look at i have verified proper voltage is geting to all circuit boards.
    Tags: None
    • Steve.B
      Senior Member
      • Dec 2008
      • 83
      • UK
      #2
      Re: philips 42mf521d/37 no picture - confused.

      I am no expert, but maybe you have a bad lamp that is tripping the cut-out on the inverter? If you search the forum you should find info on telling you how to check.

      Have you shone a bright flash light at the screen when the tv is powered on to see if you do have an image, just no back light? Does the sound work?

        Comment

        • techmadman
          New Member
          • Feb 2013
          • 3
          • usa
          #3
          Re: philips 42mf521d/37 no picture - confused.

          no sound not working but dont have any devices connected, it is disassembled on my table., but no static either. not getting voltage to t-con board, have replaced mainboard twice to make sure the first one wasn't defective. i am getting 24 volts to lcd inverter boards.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: philips 42mf521d/37 no picture - confused.

              Pictures of ALL of your boards?
              Never stop learning
              Basic LCD TV and Monitor troubleshooting guides.
              http://www.badcaps.net/forum/showthr...956#post305956

              Voltage Regulator (LDO) testing:
              http://www.badcaps.net/forum/showthr...999#post300999

              Inverter testing using old CFL:
              http://www.badcaps.net/forum/showthr...er+testing+cfl

              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
              http://s807.photobucket.com/user/budm/library/

              TV Factory reset codes listing:
              http://www.badcaps.net/forum/showthread.php?t=24809

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