Macbook Pro 13 2019 A1989 touchbar cable capacitor value

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • flusher
    Member
    • Oct 2015
    • 46
    • Ukraine
    #1

    Macbook Pro 13 2019 A1989 touchbar cable capacitor value

    Got this waterdamaged where oxidation happened under shield on touchbar cable. It showed image but no touch. After I cleaned and resoldered everything except ic (it is sealed anyway) i am getting touches however i find it a bit hit n miss where it works but sometimes missing dragging. Tapping seems fine. I think it might be something to do with this big cap which might be LDO or something. I placed 10v 2.2uF cap there. Anyone could measure it from good/dead touch bar lying around ?
    Attached Files
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14115
      • Canada
      #2
      The same Broadcom controller (BCM5976 aka Cumulus) is present on assorted Apple products including the iPAD AIR 2.

      From the AIR 2 schematics, perhaps you can figure out the value of this mystery capacitor.

      Click image for larger version Name: cumulus.png Views: 0 Size: 262.5 KB ID: 3692695

        Comment

        Previous template Next

        Related Topics

        Collapse
        • modtool
          Macbook Pro A1989 fallen, reboots if touchbar connected
          by modtool
          Hi to all,
          the owner of this macbook brought it to me after a fall, that hit the upper right corner of the top case.
          Luckily enough, the screen and all other parts of the machine haven't been damaged, only the touch bar wasn't lighting up anymore, and the macbook began to behave strangely, because it seems to start and work fine but suddendly it shutsdown (and at the same time the fans make a high rotation for half a second, as if an animal was annoyed by something...) at random times, sometimes after 2 minutes, sometimes after 5 minutes, but never over 10 minutes, then restarts...
          11-10-2023, 07:42 AM
        • bouch
          unlock macbook air A1932 2019
          by bouch
          hi

          i whant unlock macbook pro A1932 2019 whit ibridge 9,3 ;

          i change efi files find on files mina T2 activator 1,4 and use for activation mina T2 activator 1,3 , but fault ssh?

          i use mina T2 ramdisk activator 1,0 and 3,0 . but whon t work ?

          have you other programme or method compatible whit this macbook ibridge 9,3 for bypass ?

          I need help or information?

          Does anyone have the minat2 activator 1.4 software?

          Or did they use it for bypass macbook air 2019 a1932 with new ibridge 9.3?

          Thank yo...
          03-12-2025, 10:14 AM
        • ErinV
          MacBook Pro A1989 820-00850-A not powering on
          by ErinV
          Hey everyone!

          I have a MacBook Pro A1989 with a 820-00850-A board that recently stopped working. I used it overnight to charge my phone, in the morning it didn't turn on, I assumed flat battery but now won't charge and doesn't start at all.

          I have fully dissassembled it, when disconnected the battery reads at 0.012V. Even with the battery disconnected the laptop doesn't boot.

          The diode voltages around all 4 CD3215's seem fine.

          For all CD3215 (UB300, UB400, U3100 and U3200) I read just above 5V on PP20V_USBC_TA_VBUS, 3.3V on PP3V3UPC_TA_LDO, 1.8V...
          09-30-2024, 10:21 PM
        • KappaDev
          Macbook Pro A1989 (Touchbar), 820-00850-A, 20V 0A, Not Charging
          by KappaDev
          Hello,
          I have a Macbook Pro A1989 that had liquid spilled on a thunderbolt hub that was plugged into one of the USB-C ports. The laptop will now no longer charge.

          Hitting the power button displays the low battery icon and then goes off.
          Power meter shows 20V drawing 0A. The same voltage displayed and amperage drawing on all 4 ports. Since the board is relatively cheap on this model, is there anyway to force charge the battery or run the board with a DC power supply to simulate the battery to retrieve the data?

          Thanks.
          07-29-2022, 11:16 AM
        • Madoy104
          Macbook Pro A1989 - No image, working fine with external monitor
          by Madoy104
          Hi everyone,


          I have a MacBook Pro A1989 that was likely exposed to liquid. It doesn't display an image on the built-in screen, but the screen is backlit (you can't see the Apple logo or any other elements when held up to light). The laptop provides 20V and 1.5-2A, and it works fine when I use it with an external monitor. Currently, the connector for the display (J8500) is disconnected. I'm writing to ask for help in diagnosing the issue. I've heard that when the J8500 is exposed to liquid, the processor pin responsible for the display might short-circuit, and I'd like to know...
          08-15-2024, 10:01 AM
        • Loading...
        • No more items.
        Working...