magnavox 42md459b/f7 backlight

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  • airwolf
    New Member
    • Oct 2013
    • 6
    • United States
    #1

    magnavox 42md459b/f7 backlight

    Before i order a new inverter board for this TV i was wondering if i am ordering the right thing, I bought this TV off someone to fix and use, He told me for awhile the screen would flicker and then after some time darkness, You can see things on the screen with a flash light and it will play movies from the built in blu ray you can hear them playing and see them with a flashlight I been unable to test the inverter board because its hidden behind the plate as seen in the photo and i have seen a Service bulletin for the inverter board for this model taking about a .75A fuse but i don't see how i can jump it and have it back together for testing, Any ideas before i order the inverter board?

    link to SB
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    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: magnavox 42md459b/f7 backlight

      That is the very common failure fuse (looks like SMD resistor) in CMO inverter board. You can jump it with .22~.47 Ohm 1/4 W resistor. You can run the board without the protective metal cover installed for testing purpose, just make sure to install all the mounting screws back in place. I use PICO II fuse for repair.
      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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