Dell Ssx2210b no backlight

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  • LewMar
    New Member
    • Dec 2015
    • 5
    • Portugal
    #1

    Dell Ssx2210b no backlight

    Hi all,
    I'm trying to repair a Dell sx2210b LCD monitor. The backlight goes off instantly after turning power on. This monitor has an external power supply, I have replaced all caps in the inverter board, but that didn´t make any change.
    In order to test the inverter board with a cfl lamp, I have soldered a couple of wires in each ccfl connector on the inverter board, and just before connecting the cfl lamp, I tested once again the monitor and I found that the backlight works while I keep the wires soldered in the second ccfl connector.
    The wires are only soldered on the inverter board and nothing is connected to the other end, somehow it seems to act like a coil. If I disconnect the CCFL lamp on the connector where the wire is soldered, the backlight goes off.
    I suspect that one of the lamps is faulty and is not drawing enough current.

    Any help appreciated.
    Thanks
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    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Dell Ssx2210b no backlight

      It only takes one bad lamp to trigger the protection circuit. So you have one bad lamp that is fired up but does not go into conduction.
      Last edited by budm; 01-08-2016, 06:39 PM.
      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

        • stj
          Great Sage 齊天大聖
          • Dec 2009
          • 31094
          • Albion
          #3
          Re: Dell Ssx2210b no backlight

          a worn lamp should draw MORE current, you may have a cracked tube or burned solder joint.

            Comment

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