Macbook Pro A1990

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  • GfilipeZ
    Member
    • May 2021
    • 43
    • Portugal

    #1

    Macbook Pro A1990

    Hi,

    I'm working on a 820-01814-A Logic Boar, that have some water damage.
    I cleaned the areas with corrosion, and was able to turn on the Mac. Furthermore, I have also to put a new battery, because the original was faulty.
    The Mac do the boot normally, but when I plug the charger, starts charging with normal current values and then starts falling until 0.067A. If I unplug and plug again de charger on USB-C port, the current stabilizes on 0.470A (on normal case, it should go until 3/4A):
    Also, when the Mac go to sleep mode, or I turn it off, the current also draw to 0,067A. So the Mac doesn't charge when on sleep mode or turned off.

    Anyone with some clue?

    Best regards.

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  • alfredodinolfo
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  • robka
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    Hi,

    my MacBook Pro 15" 2018 Touch Bar (A1990) doesn't charge anymore. Board# 820-01041-A

    I'm not experienced in diagnostics, but I want to try to solve the problem with your help, because every local shop charges around 600€ (650 usd). Which is the value of the whole Macbook.

    The Macbook was charging when suddenly the "charging sound" appeared every other second for around 4-5 times.
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    03-02-2024, 02:58 PM
  • DATATECH85
    Macbook Pro A1990 - 820-01041 Stuck at 5V / 0.02A
    by DATATECH85
    Hello,
    I am currently working on a Macbook Pro A1990 (motherboard 820-01041) which is not charging.
    The Macbook consumes 5V and 0.019A at USB-C. There seems to be a partial short-circuit on the PPBUS_G3H rail as I have 0V on this rail.

    I've physically separated (by removing F7000 and F7001) PPBUS_G3H and the ISL9240 charging chip to see which side the short is coming from. Removing these fuses gives me 12.6V at the output of the ISL chip (PPVBAT_G3H_CHGR_REG).
    However, I can't work out exactly why I don't have the PPBUS_G3H rail.

    Here are the values...
    07-24-2024, 06:34 AM
  • Cameron Kajohn
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    by Cameron Kajohn
    I have a a1990 2018 15 inch MacBook Pro that will not power on.
    I have replaced the pch bga chip because it was heating up under my thermal camera.
    I have replaced the battery, and replaced the small ic between the gpu and cpu as it had a direct short to ground.

    the MacBook now pulls 20v 2.4amps the trackpad clicks but it does not ever attempt to power on not even fan spin. After PCH replacement I was able to get it in dfu mode 1 time and restore bridge OS, but now the MacBook will no longer go into DFU mode.

    I have also noticed L7030 gets extremely hot yet...
    01-24-2024, 12:00 AM
  • Strolch
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    by Strolch
    Hello, can anyone tell me where I can get this 26-pin FPC connector? What is the connector for?So that one's also for the Touch Bar. I thought only the FPC at the top was for the Touch Bar. But where can I get it? I can't find the connector online. I only found the 22nd pin. Thank you....
    Yesterday, 01:11 AM
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