Samsung LE26R87BD power cycling

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  • smeghead69
    New Member
    • Sep 2015
    • 2
    • uk
    #1

    Samsung LE26R87BD power cycling

    Hi all!
    I have a samsung 26" LCD it works fine for a while but when it warms up it turns off and starts to power cycle. All the caps are fine and all the rail voltages are fine. I tried to unplug the inverter board and the set stayed on fine then so i replaced the inverter but this did not fix the problem. I've seen a few post on the net with similar issues but none with any resolution yet. does anyone have any suggestions as to where to go with it next?

    If i remember correctly when it cycles the standby voltage still remains but all the others drop out and return again a few seconds later. When the set turns back on it doesnt display any input signal. does this suggest its a main board problem rather than PSU?
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Samsung LE26R87BD power cycling

      So if the standby Voltage is staying steady but the TV is cycling on and off, then you need to look at the PS-ON signal from the main board to see if it is going HIGH and LOW, <1VDC = OFF, >2VDC = ON, it should stay HIGH after power switch is activated, and goes LOW when power switch is turned OFF.
      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

        • hispeck
          Badcaps Veteran
          • Aug 2015
          • 258
          • nigeria
          #3
          Re: Samsung LE26R87BD power cycling

          Good day. Please i will like to continue with this topic because am having same issue now with the same model of samsung. Mine will goes off and ps_on will be 0v then when is on the voltage is on 3.4v

            Comment

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