LG 42LS345T Blown main fuse on PSU

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  • Andyd1970
    Badcaps Veteran
    • Feb 2013
    • 374
    • united kingdom
    #1

    LG 42LS345T Blown main fuse on PSU

    Hi Guys,

    Hope you can help, have been given this TV by a friend, basically dead, so opened it up and found main fuse on PSU blown, so purchased a packet of 3.15A quick blow fuses from Maplins, soldered one in. Turned TV on and it came on got image on screen and then "pop" it blew the fuse. I found a new PSU on ebay so bought it, but then thought it best to double check before I go ahead and fit it and then damage the new PSU. Added a picture of the internals.

    Look forward to your help guys.
    Attached Files
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    • dick_barton
      Badcaps Legend
      • Aug 2015
      • 6643
      • Wales
      #2
      Re: LG 42LS345T Blown main fuse on PSU

      The fuses tend to be anti-surge (Time delayed so prefix T) so you need to replace it with a T3.15 amp fuse and better still a ceramic fuse.

      If the set powered up with the old power supply I would replace the fuse with the correct one (T3.5A) and try again.
      Willing to help but I'm no expert.

        Comment

        • Andyd1970
          Badcaps Veteran
          • Feb 2013
          • 374
          • united kingdom
          #3
          Re: LG 42LS345T Blown main fuse on PSU

          OK, But surely there must be an issue as I replaced it with a 3.15A fuse? I heat shrunk it to make sure it was insulated.

            Comment

            • dick_barton
              Badcaps Legend
              • Aug 2015
              • 6643
              • Wales
              #4
              Re: LG 42LS345T Blown main fuse on PSU

              Do a google search on time delay and quick blow fuses which would give you a better insight than I can.

              However even if you replace it with a T3.15Amp fuse it doesn't mean that it would not blow again should the the set have a fault.
              Willing to help but I'm no expert.

                Comment

                • Andyd1970
                  Badcaps Veteran
                  • Feb 2013
                  • 374
                  • united kingdom
                  #5
                  Re: LG 42LS345T Blown main fuse on PSU

                  I appriciate that, but I was just asking if anyone suspects it to be a PSU fault normally when main fuse blows or could it be another PCB issue?

                    Comment

                    • ReeceyBurger123
                      Never Give Up !
                      • May 2014
                      • 7325
                      • Britain
                      #6
                      Re: LG 42LS345T Blown main fuse on PSU

                      Dear me
                      Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

                      https://www.facebook.com/Telford-Tel...7894576335359/

                        Comment

                        • dskall
                          Badcaps Legend
                          • Oct 2016
                          • 2905
                          • usa
                          #7
                          Re: LG 42LS345T Blown main fuse on PSU

                          If power board blows fuse you have problems with power board
                          I assume no responsibility for any stupid suggestions I might post.

                            Comment

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