Bad mains power causing TV malfunctions?

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  • chopduel
    New Member
    • Jan 2024
    • 7
    • Europe

    #1

    Bad mains power causing TV malfunctions?

    Hi,
    I've been living in the same apartment for about 5 years now, and moved into it with my old Samsung plasma TV (PS51F5500).
    Ever since we've moved in, we would sometimes see strange power-cycling behavior. For example:
    • TV would randomly turn off then back on.
    • TV would turn off and the LED light would blink for a while (over a minute sometimes) until eventually it went back to a regular off state and could be turned on
    • Sometimes it would require disconnecting the mains cord from the TV, waiting several minutes, then putting it back in and turning the TV back on. This had limited success as well. Sometimes it worked, sometimes we still had to wait.
    Eventually after a few years, one day the TV turned off and wouldn't turn on at all. After some unskilled attempts at replacing the power board and such, I gave up and threw it away.

    Now we bought a new LG OLED TV (65" B4), and yesterday we suddenly noticed a similar phenomenon. The TV display froze for a few seconds, then it turned off, the LED blinked a few times and then it turned back on.

    I'm now worried that there is some issue with the mains power in my apartment which is eventually going to destroy my new TV as well.
    The TV is connected to an extension cord which is shared with an anker multi-port charging station (which is mostly used only at night), and that extension cord is in turn connected to a different extension socket which is shared with the robot-vacuum charger and a couple of USB ports of which only one is used for a super low-power IKEA night lamp.
    I've used a device to check this socket for ground and/or reverse polarity issues and it seems that everything is working fine in this regard. In any case the new TV's mains cable does not have a ground leg.

    Any kind of advice would be very welcome,
    Thanks in advance!
  • EazyBone
    Badcaps Legend
    • Jun 2023
    • 1320
    • United states

    #2
    I mean, try to plug it into a dedicated outlet and then see what happens. Seems like easiest test to do. But also go buy 5 yr warranty

    Comment

    • petehall347
      Badcaps Legend
      • Jan 2015
      • 4426
      • United Kingdom

      #3
      get the electrical supply and installation checked by a competent person

      Comment

      • chopduel
        New Member
        • Jan 2024
        • 7
        • Europe

        #4
        Originally posted by petehall347
        get the electrical supply and installation checked by a competent person
        Can you please clarify? Which electrical supply are you referring to? The one inside the TV?

        Comment

        • petehall347
          Badcaps Legend
          • Jan 2015
          • 4426
          • United Kingdom

          #5
          Originally posted by chopduel

          Can you please clarify? Which electrical supply are you referring to? The one inside the TV?
          apartment

          Comment

          • chopduel
            New Member
            • Jan 2024
            • 7
            • Europe

            #6
            Originally posted by petehall347

            apartment
            Thanks
            Any suggestions for what to look for? Voltage drops, voltage spikes?
            I'm not an electrician so any guidance would be very helpful

            Comment

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