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Type: Posts; User: BrickBreaker

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  1. Replies
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    Re: 3437 Low Res to Gnd on 3v42

    Solved, it was C5002. Visibly burnt I just really love reballing SMC
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    3437 Low Res to Gnd on 3v42

    I have a 3437 air board, ppbus was only 0.8V, 3v42 - 1.3V
    PPDCIN 3v42 - 15.55V
    Resistance to ground on 3v42 was 30 ohms
    KG board measured 22 kohm

    Started removing stuff and now I'm out of stuff...
  3. Re: Macbook Pro 13" A1708, (820-00840-A)

    Still working on this? Any news?
  4. Re: 00165 - Trackpad works Keyboard doesn't

    I reinstalled the OS to flash the firmware. No change.
  5. Re: 00165 - Trackpad works Keyboard doesn't

    Tpad conn (J4800) voltage on login screen:
    1 - 3.42
    2 - 0.11
    3 - 0.0
    4 - 0.19
    5 - 0.30
    6 - 0.0
    7 - 0.0
    8 - 0.0
    9 - 0.004
  6. Re: 00165 - Trackpad works Keyboard doesn't

    Tried KG tpad cable when I tried KG keyboard/trackpad. I'll take some measurements on the trackpad connector but it looks good under the microscope. It would seem we've ruled out keyboard and...
  7. Re: 00165 - Trackpad works Keyboard doesn't

    Yup. Tried new trackpad same behavior: tpad works everywhere, keyboard works nowhere. Power button and smc reset lines work.
  8. 00165 - Trackpad works Keyboard doesn't

    I have a riddle for you: the trackpad works everywhere (efi and os) and the keyboard works nowhere. The power button works and SMC reset even works but not boot options, not nvram, and none of the...
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    Re: 00163 No Backlight

    12.6V through R7700. Q7706 has 12.6 sitting on its input, 0 output so 0 all the way down to the connector.
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    Re: 00163 No Backlight

    It's like the last line in my post "I2C lines to connector are good now" Double checked continuity just now for peace of mind. Both data lines (I2C_BKLT_SCL and SDA) are electrically continuous...
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    00163 No Backlight

    This was sent in with liquid damage. I have 5v on the LCD detection filter, 5v in to the backlight driver, BKLT enable present, continuity along all these backlight traces, the voltage divider for...
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    Macbook 820 3115 No Backlight

    3115 Board, I already replaced U7600 to get ALL_SYS_PWRGD back and now its chiming, booting, I get video no backlight. Missing LCD_BKLT_EN BUT I have 3.3V on Pin 1 U9000. I'm thinking bad PCH. PCH...
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    Macbook 820 3662 Bios Woes

    Laptop originally worked but was bios locked. After unlocking, won't post but power rails are all present CPU gets lightly warm and fans spin normally for as long as I leave it on. Already pulled a...
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    Re: Macbook Air 00165 Short on PPBUS_G3H

    It was U1900 I needed to touch up pins after I replaced it. Now it's fixed.
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    Re: Macbook Air 00165 Short on PPBUS_G3H

    Okay so I think I may have been trolling myself with PPBUS's usual low resistance to ground or maybe there were bad mosfets on my donor boards but I have no short now, full 8.6V on PPBUS, and this...
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    Macbook Air 00165 Short on PPBUS_G3H

    This board had lots of water damage. I repaired everything I could see, plugged in a speaker and screen, I got LoC chime and flashing folder. Ultrasonic cleaner to get it ready to ship out and now it...
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    Macbook Air 00165 No P5VS4RS3_EN_L

    Customer reported that it "just turned off unexpectedly" and wouldn't turn back on. Some liquid along lcd hinge but no help from the board, no visible damage of any kind. This is one of those awful...
  18. Re: Apple Macbook 820 3787 No Video After Bios Repair

    Thanks for the advice. We just upgraded to a flash reader with this clamp system (no soldering required) that makes it much easier once you remove the chip from the board. I wonder if I need to clean...
  19. Re: Apple Macbook 820 3787 No Video After Bios Repair

    [QUOTE=mitchW;22767]
    It could be an EFI problem, try flashing it with an old locked dump and see if it works. You might have a bad EFI chip, write the flash and then read it back few times then...
  20. Apple Macbook 820 3787 No Video After Bios Repair

    This board was originally firmware locked, which I fixed but in the process I melted the keyboard cable, and I used the hot air on the bios chip with the power plugged in... whoops. Right now the...
  21. Re: A1502 2015 MacBook, strange backlight issue

    You might want to check SMC_LID since it sounds like the lid closing is not behaving as expected.
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