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MacBook Pro 13" Touch Bar 2018 820-00850

Discussion in 'BIOS Laptop' started by ThienBui, Aug 20, 2018.

MacBook Pro 13" Touch Bar 2018 820-00850 5 5 2votes
5/5, 2 votes

  1. ThienBui

    ThienBui CEO Staff Member

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    MacBook Pro 13" Touch Bar (A1989)
    820-00850-07
    820-00850-A
    820-00850-B
    820-00850.
     
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  3. Atinder Saini

    Atinder Saini Well-Known Member

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    Schematics for sale?
     
  4. B4RDOCK

    B4RDOCK VIP MENBER

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  5. Atinder Saini

    Atinder Saini Well-Known Member

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    UPDATE:Someone said that there is no sam connector for mid 2018 and 2018 do not have efi IC that there is new security. Anyone with available schematics for newer 2018 models?

    sam connector missing. im thinking soldering sam connector because it looks like pinout is there.
     
    #4 Atinder Saini, Sep 2, 2018
    Last edited: Sep 5, 2018
  6. therealjayvi

    therealjayvi Well-Known Member

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    Here is a more detailed picture of the chip in the picture above, maybe somebody else will have better luck in finding a data sheet or something. I've tried contacting both Renesas as well as Intersil directly to locate information about the chip and neither have any clue about what it is.

    1f1493eebd97ab73be0f52f175f3079d.
     
  7. therealjayvi

    therealjayvi Well-Known Member

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    I can confirm that the hirose connector does NOT fit on the pins between the T2 and the CPU. If you look elsewhere you will find that this plug is found in multiple places throughout the board, though between the T2 and the CPU is the only place where the pins are covered up. Scratching back the traces and tinning the pads reveals that the pins have a smaller than 0.4mm pitch. After doing some basic math, I estimate the pitch needed to be about 0.27mm, and at this time there is no sam connector available on digikey or mouser. I do not have a steady hand enough needed to solder micro wires to the pads to test for connectivity, though maybe somebody else will.
     
  8. Atinder Saini

    Atinder Saini Well-Known Member

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    I solder wires but no connection. We would need schematics but even that doesn't mean it would allow write. If schematics are there I could solder but issues is layout/data sheet.
     
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  9. therealjayvi

    therealjayvi Well-Known Member

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    I'm confident that I could find at least more info than we have now with a successful soldering to the pads. My hands are tied steady enough nor do I have the proper equipment to be able to attach wires to each of the pads without bridging anything. It may not lead to anything important, but anything is better than nothing .

    On a side note, I've heard from multiple sources (questionable credibility) that connectivity to the board may be possible through thunderbolt ports somehow. One source even said specifically the "back-right port" is used to probe the board. I have yet to confirm or deny this but my be worth looking into.
     
  10. cifam

    cifam VIP PRO

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    schematic !!!!
     
  11. therealjayvi

    therealjayvi Well-Known Member

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    You have?
     
  12. cifam

    cifam VIP PRO

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    what you need .
     
  13. cifam

    cifam VIP PRO

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    ok T2 chip is just controller .. remeber ...!!!!!! hhhh full securty ... applezzzzzzzzzz what you want applezzzzzzzzzzzzzzzz
     
  14. cifam

    cifam VIP PRO

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    see this picture .....
     

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  15. racchid

    racchid Well-Known Member

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    A1990 (EMC 3215)
    can you help me for that , unlock bios?!
     
  16. ThienBui

    ThienBui CEO Staff Member

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    backup send i file bios.
     
  17. racchid

    racchid Well-Known Member

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    dindn't find bios ship!!!!!
     
  18. B4RDOCK

    B4RDOCK VIP MENBER

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    model 2018 have special chip security so cant remove efi on this moment no solution friend
     
  19. racchid

    racchid Well-Known Member

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    thank you
     
  20. dam1inc

    dam1inc New Member

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    no schematics available yet?

    Sent from my SM-G955U using Tapatalk
     
  21. ThienBui

    ThienBui CEO Staff Member

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    current Unavailable schematic
     

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