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Toshiba Satellite Pro 420CDT high-pitched whining noise - What could it be?

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    #16
    Thank you for the help! I ordered some capacitors with matching specifications and similar dimensions to the originals and will report back as soon as I receive the replacements.
    Vintage computer systems and peripherals I'm currently looking for:
    IBM PS/2 Model P70, Compaq Contura 3/25, Any Toshiba Libretto laptop from the Libretto 50CT up to the 110CT, Commodore 1541 disk drive in working condition.

    Send a PM if you are interested in selling any of these items to me. Thanks!

    Comment


      #17
      Update: Replaced the capacitors with new ones, made sure the polarity lined up and I had the right capacitors in the right holes, made sure the solder joints were good... No dice.

      Did I do something wrong or does this indicate the backlight itself is the problem?
      Vintage computer systems and peripherals I'm currently looking for:
      IBM PS/2 Model P70, Compaq Contura 3/25, Any Toshiba Libretto laptop from the Libretto 50CT up to the 110CT, Commodore 1541 disk drive in working condition.

      Send a PM if you are interested in selling any of these items to me. Thanks!

      Comment


        #18
        I'd check the traces, the area under the bad capacitor looked pretty corroded.

        Comment


          #19
          Originally posted by GiGaBiTe View Post
          I'd check the traces, the area under the bad capacitor looked pretty corroded.
          Damn. Close inspection of the board reveals not one, but two missing solder pads and two traces eaten away.

          Should I just assume the board is effed and replace it entirely?
          Vintage computer systems and peripherals I'm currently looking for:
          IBM PS/2 Model P70, Compaq Contura 3/25, Any Toshiba Libretto laptop from the Libretto 50CT up to the 110CT, Commodore 1541 disk drive in working condition.

          Send a PM if you are interested in selling any of these items to me. Thanks!

          Comment


            #20
            There's some "tricks" you can do with trace/pad repair....depends on your level of soldering expertise. Personally I'd give it a go, but I do such every weekday for a living.

            Comment


              #21
              Originally posted by TH2002 View Post

              Damn. Close inspection of the board reveals not one, but two missing solder pads and two traces eaten away.

              Should I just assume the board is effed and replace it entirely?
              You can use bodge wires to repair the traces. The pads I'm assuming are for the capacitor, if they don't go anywhere on the top of the board and the pads on the bottom side of the board are fine, you can leave those alone. You'll want to keep the bodge wires as short as possible and as flat as possible if they're under the capacitor so it doesn't have to be lifted up too high and potentially interfere with the laptop case.

              Comment


                #22
                Originally posted by GiGaBiTe View Post

                You can use bodge wires to repair the traces. The pads I'm assuming are for the capacitor, if they don't go anywhere on the top of the board and the pads on the bottom side of the board are fine, you can leave those alone. You'll want to keep the bodge wires as short as possible and as flat as possible if they're under the capacitor so it doesn't have to be lifted up too high and potentially interfere with the laptop case.
                Wouldn't hurt to add some hot glue around the part if it's not secure to the board after the above.

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