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Insignia NS-55D510NA19 backlight problem

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    #1

    Insignia NS-55D510NA19 backlight problem

    This Tv came in with no backlights, audio was fine and with the flashlight test it showed the image was fine. Took measurements at led connector CNB801 and nothing. The backlights came on fine using a backlight tester so I pulled the combo PS/Main and put the board under the microscope and found a blown resistor at R8310, blown cap at C6316 and after replacing both she fired up fine. Before you assume it's the backlights look very close especially in this section.
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    #2
    Re: Insignia NS-55D510NA19 backlight problem

    That is R/C snubber for the MOSFET, good find.
    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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      #3
      Re: Insignia NS-55D510NA19 backlight problem

      What is the voltage for the CNB801 going to the backlight lights. I have 45.5 volts Dc.
      Also what voltage do i need to test each strip #303T C550033

      Comment

        #4
        Re: Insignia NS-55D510NA19 backlight problem

        Originally posted by budm View Post
        That is R/C snubber for the MOSFET, good find.
        Could not use the link for the teardown pics. Is that still active?

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