A1990 820-01814 shematics and Brd

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  • SLB007
    New Member
    • Jul 2016
    • 1
    • United Kingdom

    #1

    A1990 820-01814 shematics and Brd

    Hey Chaps! Does anyone have it? cannot seem to find it in the forum.

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  • alfredodinolfo
    MacBook Pro 2019 (A1990)
    by alfredodinolfo
    mb code:820-01827-A;
    sn:C02Z349ALVDR;
    i9 32GB Ram 1TB

    Hi, I found short on one of 6 black nand (total 1TB).
    i removed all 6 nand ( voltages all ok) and now i want to program with JC P15 but for A1990 2019 there is only 512GB configuration.
    I try A2141 1TB configurazion with TSB4228 but the position on pcb is different ( U9300 and U9400 is no stuff on A1990 but present on A2141 and U8800 and U8900 is no stuff on A2141 but present on A1990 )
    macbook with A2141 configuration run on recovery but don't complete it.​
    anyone can help me?
    05-26-2025, 09:27 AM
  • master_haze86
    A1990 820-01814-A dead not charging - need help with diagnostics.
    by master_haze86
    Good day everyone,

    Let me preface this with letting you know that I have a smalltime computer repair shop but do not have a lot of experience when it comes to board diagnostics. I am good at soldering etc but finding the issue if there isn't an obvious burnt component is not my strong suit.

    The other day I got a customer come in with a macbook A1990 (motherboard 820-01814-A) that would not turn on and had previously been getting the warning message that the battery needed servicing. (Most folks seem to ignore that message, just like the check engine light in vehicles.)...
    09-13-2025, 06:01 PM
  • Strolch
    MacBook A1990 26 Pin Connector
    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....
    09-03-2025, 01:11 AM
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  • falcontech
    Macbook Pro a1990 activation locked
    by falcontech
    Hi,
    I received a 2018 MacBook Pro A1990 for repair, and the motherboard was replaced, presumably purchased on AliExpress. The motherboard's activation is blocked because the previous owner didn't delete it. Does anyone have a solution to this problem? I called Apple, and as expected, they asked me to activate the process with proof of purchase for the original computer, which I find very difficult, so the proof of purchase from AliExpress will be of little use. Any suggestions? Thanks.
    09-29-2025, 06:57 AM
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