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le46m87bd no backlight help please

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    le46m87bd no backlight help please

    Help with inveter fault
    Samsung le46m87bd

    When tv is turned on the unit comes on then the master inverter makes a a buzzy cracking noise and the backlight switchs off any ideas no burn marks nothing popped is there a way to determin which transformer on the inverter is dead or causing the backlight shutdown

    Any ideas
    Thanks

    #2
    Re: le46m87bd no backlight help please

    Could be arcing inside LCD panel - shorted bulb/bulb connector. Take an energy saving bulb (CFL) and put the light end near each transformer output - whichever does not glow may be bad (or the output is shorted inside the panel)
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

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      #3
      Re: le46m87bd no backlight help please

      Tom can you explain this test please mate I don't think its a short I think one of the transformers is dead mate

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        #4
        Re: le46m87bd no backlight help please

        I've explained it all.. Take a CFL and put it near each trafo. It will glow in the presence of high voltage. That will tell you where any fault is. If no glow - bad trafo or arcing lamp
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

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