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Slow 3115, passes ASD

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  • Slow 3115, passes ASD

    Liquid Damage around TB, BL, ENET, FW, and U2600. I disabled TB, repaired ENET and FW, and replaced most of BL. I'm assuming the slowness is related to u2600. Also, had a slightly corroded through hole on PP1V2_S5_SMC_VDDC near SMC. Fluxed SMC and heated to 190 degrees for 10 seconds. I don't have a replacement for U2600 and would like to know if this would cause the slowness.

    PPBUS at 12.53v with charger plugged in, around 11.7v currently with 70% charged batt by itself.

  • #2
    Slowness could be something around the SMC or the SMC itself. Replace U2600 just to rule that out. What voltage do you get on AVREF for the SMC?

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    • #3
      If board starts, U2600 should be good.
      Board wil only start in SMC bypass mode if AVREF_SMC voltage is not good.

      Try first known good trackpad board/flex.

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      • #4
        Replaced U2600 anyway for good measure, AVREF_SMC reads normally at 3.29v. Also, tried another good trackpad/flex and seems maybe a little faster but still lags, using 2 good SSDs and both are slow. I did notice that an SMC Reset wont stay shut down, it automatically starts the mac again. I guess it may be the SMC or the components around it?
        Last edited by Hellfiya; 05-04-2019, 11:57 AM.

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        • #5
          Try your test OSX through USB, just in case.
          Also try clean ME BIOS.

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          • #6
            Thanks for the suggestions, other hdd cable and usb caddy both yield slow results. I'll try flashing a clean me bios one I figure out how to properly use by bios flasher.

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            • #7
              Make first backup of your chip.
              Then search the forum, some clean file should be available.

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