Toshiba T130 no video

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  • Th3_uN1Qu3
    Believe in
    • Jul 2010
    • 6031
    • Romania

    #1

    Toshiba T130 no video

    I have this Toshiba T130 (Quanta BU3 MB) that does not show video. All voltages are present, but CPU Vcore is 0.87v which usually indicates that the CPU is not being initialized. CPU and NB are only getting warm even with the heatsink off.

    I've checked the clock generator on the oscilloscope and i'm not getting CPU_BCLK and NB_DPLL_REF_CLK - the CPU can't work without a clock so there is obviously something wrong here, but i don't know what is supposed to control those clocks.

    I have flashed BIOS and reflowed the AC82GS40 NB. It still does the same. Attached schematic.
    Attached Files
    Originally posted by PeteS in CA
    Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
    A working TV? How boring!
  • polytek
    Badcaps Veteran
    • Dec 2013
    • 496
    • TUNISIA

    #2
    Re: Toshiba T130 no video

    hi, friend
    the clock gen can not work if not receive the hardware power good signal, check U18 PIN 63 for CLK_PWRGD, then check U13 (page 14)
    if the powergood not delivred, we have a power problem, check if the ich goes hot.
    Attached Files

    Comment

    • Th3_uN1Qu3
      Believe in
      • Jul 2010
      • 6031
      • Romania

      #3
      Re: Toshiba T130 no video

      Pin 63 gets 3.3v so i assume that is ok.
      Originally posted by PeteS in CA
      Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
      A working TV? How boring!

      Comment

      • polytek
        Badcaps Veteran
        • Dec 2013
        • 496
        • TUNISIA

        #4
        Re: Toshiba T130 no video

        ok, have you a debug card ?
        if yes what code show the post card ?

        Comment

        • Th3_uN1Qu3
          Believe in
          • Jul 2010
          • 6031
          • Romania

          #5
          Re: Toshiba T130 no video

          I do have a debug card. It shows nothing in the wifi card slot, CLK led not flashing. Likely the LPC pins are not hooked up on this board. Do you think it is worth soldering wires to the KBC to find out? Btw i have also reflowed the CPU just to try and see what it does and there is no change.
          Last edited by Th3_uN1Qu3; 10-21-2015, 02:01 PM.
          Originally posted by PeteS in CA
          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
          A working TV? How boring!

          Comment

          • atsio
            Badcaps Veteran
            • Oct 2013
            • 819
            • Greece

            #6
            Re: Toshiba T130 no video

            Reflowed NB will not do anything, reball

            Comment

            • Th3_uN1Qu3
              Believe in
              • Jul 2010
              • 6031
              • Romania

              #7
              Re: Toshiba T130 no video

              I don't have a stencil for that intel chip unfortunately.
              Originally posted by PeteS in CA
              Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
              A working TV? How boring!

              Comment

              • polytek
                Badcaps Veteran
                • Dec 2013
                • 496
                • TUNISIA

                #8
                Re: Toshiba T130 no video

                check the frequency of clock gen crystal Y1=14.318MHZ , change Y1 fisrt then try to change the clockgen if you not have the right frequency.

                Comment

                • Th3_uN1Qu3
                  Believe in
                  • Jul 2010
                  • 6031
                  • Romania

                  #9
                  Re: Toshiba T130 no video

                  Done both. Still no go.
                  Originally posted by PeteS in CA
                  Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                  A working TV? How boring!

                  Comment

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