Seiki SE39UY04 Unreliable power on

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  • Blackwolf
    Member
    • Mar 2012
    • 18
    • USA
    #1

    Seiki SE39UY04 Unreliable power on

    I have a Seiki SE39UY04 (yes i know these things are notoriously crappy) and when connected to power the red light (standby) comes on but the tv wont always power on. If i give it a good whack on the back of the unit, it will come on and work fine for hours. It will even turn on and off fine after that until i turn it off and let it sit for a few hours, then the same problem happens. Im thinking it might be some kind of bad connection or bad solder joint somewhere given that a good whack makes it work. I took apart the tv and looked for any obvious signs of bad components but everything looks fine. I reflowed the solder on the legs of the transformers as i read this was a common issue. Now not even a whack seems to make it work. I'm not sure where to go next. Any help would be greatly appreciated!

    Thanks!
    Last edited by Blackwolf; 05-08-2016, 12:58 PM.
    Tags: None
    • dick_barton
      Badcaps Legend
      • Aug 2015
      • 6643
      • Wales
      #2
      Re: Seiki SE39UY04 Unreliable power on

      Remove the back cover and using an insulated screwdriver handle or something similar, gently tap the circuit boards to see if you can identify the area that brings it back to life.

      Edit
      Sorry just re-read your post and whacking doesn't bring it back to life

      Look over what you have already done and see if you have reconnected all the connections you removed or accidently swapped them over. Did you put all the screws back in the circuit boards.

      Post a sharp picture of the back of the power supply
      Last edited by dick_barton; 05-08-2016, 01:20 PM.
      Willing to help but I'm no expert.

        Comment

        • Blackwolf
          Member
          • Mar 2012
          • 18
          • USA
          #3
          Re: Seiki SE39UY04 Unreliable power on

          Tried that but now nothing seems to make it want to power on

            Comment

            • dick_barton
              Badcaps Legend
              • Aug 2015
              • 6643
              • Wales
              #4
              Re: Seiki SE39UY04 Unreliable power on

              Then lets start by posting photo's of the circuit boards so that others can assist you. Nice sharp photo's would be good.
              Willing to help but I'm no expert.

                Comment

                • CapLeaker
                  Leaking Member
                  • Dec 2014
                  • 8213
                  • Canada
                  #5
                  Re: Seiki SE39UY04 Unreliable power on

                  Is it truly not powering up, or are just the back lights out?

                    Comment

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