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NVIDIA SLI Dual GeForce 8600M GT (short)

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    #1

    NVIDIA SLI Dual GeForce 8600M GT (short)

    I've have an NVIDIA SLI Dual GeForce 8600M GT that has short on the board, when it's plugged into the notebook (satellite x205-sli1) it takes the psu right down no power light, battery not charging nothing at all, remove the card & the notebook attempts to boot and will fully charge the battery. I measured the video card voltage output on the motherboard (without the card installed) and it measured 19-volts dc on all three pins.

    So I applied about 1 to 1.5 volts to the video card voltage inputs and it was drawing about .5 amps and the mosfet chips were getting very hot. Does any one know how to test these particular chips for a short circuit on or off the board.

    I'm also having I hard time finding a data sheet on the power inductor/coils, I removed one & must have got it a little to hot, (fell apart) I think it was ok to begin with.
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    #2
    Re: NVIDIA SLI Dual GeForce 8600M GT (short)

    Originally posted by sundancer View Post
    Does any one know how to test these particular chips for a short circuit on or off the board.
    Download datasheet at

    http://pdf1.alldatasheet.com/datashe...RF8113PBF.html

    Put your multimeter on 200 ohms if manual ranging. You can test this "in circuit".

    Test for shorts by measuring D-S, S-G, D-G.

    Any reading less 30 ohms suggests a short.
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      #3
      Re: NVIDIA SLI Dual GeForce 8600M GT (short)

      Chip #1
      D-S= 4.71M
      S-G= 3.19M
      D-G= 11.28M

      Chip #2
      D-S= 4.71M
      S-G= 3.19M
      D-G= 11.34M

      Must be something further up.
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        #4
        Re: NVIDIA SLI Dual GeForce 8600M GT (short)

        Reflow it. This chip is known to have inherent defects. Reflowing might fix it temporarily, but ultimately failure is inevitable.
        "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

        -Leonid Brezhnev (On the Yom Kippur War)

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