sony kdl32bx300 no picture, no backlight, no audio just green power light

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  • falc4uon
    New Member
    • Jan 2016
    • 3
    • Hrvatska
    #1

    sony kdl32bx300 no picture, no backlight, no audio just green power light

    Hi, I have sony bravia kdl32bx300. No picture, no backlight, no audio, just green power light which blinks once every 30 sec with clicking sound.
    I have measured voltage on ps connector and main board connector and they are all ok except BL-ON, no voltage at all. I also noticed when green power light blinks all voltages drop down to zero and then rise again every time. Remote not responding. Is it PS board or main board problem? Any help would be greatly appreciated
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: sony kdl32bx300 no picture, no backlight, no audio just green power light

      Originally posted by falc4uon
      Hi, I have sony bravia kdl32bx300. No picture, no backlight, no audio, just green power light which blinks once every 30 sec with clicking sound.
      I have measured voltage on ps connector and main board connector and they are all ok except BL-ON, no voltage at all. I also noticed when green power light blinks all voltages drop down to zero and then rise again every time. Remote not responding. Is it PS board or main board problem? Any help would be greatly appreciated
      The Voltage cannot be all OK ,if it drops down to zero and the rise again.
      Do you get standby Voltage or it also goes up and down?
      Do the standby Voltage become steady if the main board is not connected to the power supply?
      If the standby Voltage goes up and down it can be the power supply problem or the main board is drawing too much current so it goes into shutdown-restarting condition.
      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

        • falc4uon
          New Member
          • Jan 2016
          • 3
          • Hrvatska
          #3
          Re: sony kdl32bx300 no picture, no backlight, no audio just green power light

          Standby voltage is steady all the time. When I disconnect main board from PS board I got this steady readings:

          STDBY 3,3V
          AC DET.OFF 3,3V
          POWER ON -2,1V(negative)
          BL ERR 1,8V

          No green power light.
          Also noticed beneath PS board that one chip resistor 104 is melted. So probably
          PS board is bad and also thinking main board because there is no BL ON voltage present just BL ERR.

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