HP - LA-D704P Rev 1.0 No Power Motherboard HELP

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  • Sephir0th
    Badcaps Legend
    • Oct 2020
    • 1282
    • Germany
    #61
    Re: HP - LA-D704P Rev 1.0 No Power Motherboard HELP

    Are you injecting while the heatsink is mounted? The shorted coil is on the side of the substrate where the PCH, so it's pretty clear what is going on.
    FairRepair on YouTube

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      • harshana
        Badcaps Veteran
        • Aug 2022
        • 207
        • Sri Lanka
        #62
        Re: HP - LA-D704P Rev 1.0 No Power Motherboard HELP

        Originally posted by Sephir0th
        Are you injecting while the heatsink is mounted? The shorted coil is on the side of the substrate where the PCH, so it's pretty clear what is going on.
        I removed the heatsink as well

          Comment

          • Sephir0th
            Badcaps Legend
            • Oct 2020
            • 1282
            • Germany
            #63
            Re: HP - LA-D704P Rev 1.0 No Power Motherboard HELP

            Well, powering the board with missing components (after DC-IN circuit) wasn't a good idea. I'm to lazy to look into the schematics but to me sounds like a completely shorted PCH not only through the 3.3V but also through the 1.05V rail. If it wasn't so from the beginning, it went while troubleshooting.
            The PCH die which shares the substrate with the CPU die should heat up when injecting 1V 3A in the 1.05V or 3.3V rail.
            Sorry to say that, but the board is gone.
            Last edited by Sephir0th; 08-24-2022, 04:16 PM.
            FairRepair on YouTube

              Comment

              • harshana
                Badcaps Veteran
                • Aug 2022
                • 207
                • Sri Lanka
                #64
                Re: HP - LA-D704P Rev 1.0 No Power Motherboard HELP

                Originally posted by Sephir0th
                Well, powering the board with missing components (after DC-IN circuit) wasn't a good idea. I'm to lazy to look into the schematics but to me sounds like a completely shorted PCH not only through the 3.3V but also through the 1.05V rail. If it wasn't so from the beginning, it went while troubleshooting.
                The PCH die which shares the substrate with the CPU die should heat up when injecting 1V 3A in the 1.05V or 3.3V rail.
                Sorry to say that, but the board is gone.
                When i inject voltage no one were heated up. Thats the surprising part.

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