LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

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  • noledud
    Badcaps Veteran
    • Dec 2013
    • 413
    • united kingdom
    #1

    LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

    Hi all

    Got this freebie LG PDP42V7 badged as a Hyundai HPT-4260

    Problem is red LED powers after first click - ( standy by fine )

    Press power then light turns blue and you have a delay until another click and it stays like that

    Using DMM voltage comes up for a split second then shuts off again

    if i apply heat to PS then it works as normal and i get a picture

    dosnt take much heat to get working so hard to narrow down, iv seen other threads on this so i replaced the caps in the center row

    C210 50v 1UF
    C203 50v 10UF
    C310 50v 1UF
    C303 50v 10UF
    C505 25v 220UF
    C504 35v 47UF
    C428 50v 1UF
    C403 50v 10UF

    These have made no difference, does any one suspect or know of a set of caps i should concentrate on as there are quite a lot on this board and all look good

    Cheers
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    • noledud
      Badcaps Veteran
      • Dec 2013
      • 413
      • united kingdom
      #2
      Re: LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

      bump?

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

          Have you replaced all the small ones on the primary side? Check for cold joints too.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • noledud
              Badcaps Veteran
              • Dec 2013
              • 413
              • united kingdom
              #4
              Re: LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

              primary side being the left with the majority of caps on? - no i havnt just wanted to get suggestions befor i did

              iv check for cold joints re-flowed most the board to make sure

              thanks tom

                Comment

                • scat
                  New Member
                  • Oct 2014
                  • 6
                  • australia
                  #5
                  Re: LG PDP42V7 / Hyundai HPT-4260 PS fault - USP440M-42LP

                  Hi,
                  I have a problem of no picture on my PDP42V7 where the power supply seems fine, and my limited testing can't fail the Ysus or the Zsus. I'll post a new thread rather than hijack this. :0)

                    Comment

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