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    Toshiba 40L5200U

    TV has no backlight. BLON is missing. All other voltages for main board and LED driver are present. CPU on a main board was getting hot. There was no cold spray around so I used a "thermo paper receipt method" under the CPU and found a coil L17 "being hot". Removed it, now the CPU is not getting hot anymore but I still don't have BLON.
    Can't find any schematic for that main board which is Toshiba 75028898 (431C4R51L01) Main Board. I know that it is available on ShopJimmy, waiting for a customer response on a price.
    For the time being I thought maybe anyone has any suggestions beside changing the whole main board. Thanks!
    Pictures credit goes to ShopJimmy
    Attached Files

    #2
    Re: Toshiba 40L5200U

    Where is L17 located? It sounds like you disconnected the power to the CPU when the inductor is removed.
    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

    Comment


      #3
      Re: Toshiba 40L5200U

      So replacement Main board fixed it.

      Comment

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