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UN55D6000 - [WAS] turning back on after poweroff [NOW] wont turn on at all

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    UN55D6000 - [WAS] turning back on after poweroff [NOW] wont turn on at all

    Samsung UN55D6000 - 55" LED Smart TV.

    Got this set with shorted LEDs in the backlight assembly. This unit uses two rows of LEDs along the left and right edge of the screen. I replaced both LED strips, and the set worked perfectly until now.

    A couple of months ago, we noticed that the TV was turning itself back on after being commanded to power off. I tried diagnosing every possibility except for opening up the TV - blocked the iR sensor, disabled network control and HDMI-CEC in the settings, unplugged the network and HDMI cables leaving only the power cord connected - TV still turned back on immediately after powering off.

    Fast forward to a week ago - I noticed the TV was off. I tried to turn the TV back on with the remote, and no response. Walked up to the TV, and noticed the red "standby/power" LED next to the power touchpad was flashing rapidly. It didn't seem to be flashing in any sort of error pattern, just rapid flashing that did not pause or stop at any time. All buttons on the front panel and remote control are unresponsive.


    Do these symptoms seem to correlate to a faulty circuit in the power board?

    I guess I should start tearing apart the TV and checking voltages.

    #2
    Re: UN55D6000 - [WAS] turning back on after poweroff [NOW] wont turn on at all

    Do the visual inspection of the boards, look at the connectors at both ends of the cable that goes from power supply board to the main board.
    Check the Voltages at the power supply connector when TV is off and when power switch is activated.
    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


      #3
      Re: UN55D6000 - [WAS] turning back on after poweroff [NOW] wont turn on at all

      SPI Flash need reset via service menu or replace

      Comment


        #4
        Re: UN55D6000 - [WAS] turning back on after poweroff [NOW] wont turn on at all

        I highly suggest you perform a factory reset. If you don't know how, check out this video:

        https://youtu.be/15iwEiWezvs

        Comment

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