Got a 2021 14" MacBook Pro M1 here that died suddenly. No signs of liquid damage. However there was a strong burned smell. Upon removing and flipping the board I found a burned cap C9400 near PMIC U9300. Photos attached. Should I just proceed with replacing U9300 and some of the surrounding caps? Also, I don't have any donor boards from this generation of MacBooks, maybe could locate a compatible cap from an older touchbar model?
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On the bottom side plate there should be an A**** laser marking. What is this number?
On your board, you should have a 820-**** number on the PCB (usually in copper covered in black solder mask) - if available, what are these details? Each will help to determine the exact board you have.
Also, unable to view the posted photos in the first post.Comment
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Not sure what happened to the photos, they were loading before. Here are some imgur links:
https://i.imgur.com/wawkeqC.jpeg
https://i.imgur.com/y6n1gw6.jpeg
Macbook is model A2442. The logic board number is 820-02098-07
Thanks!Comment
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Those CAPS are power caps, I would replace all the suspected CAPS that are blown. Test each cap that doesn't look blown, remove the blown cap and test for short to ground, see if the Line is still shorted after you remove the bad cap. If it is still shorted trace back to that long on the schematic and find what areas are connected. I suspect this would be an easy fix.sigpic
MEOWING IN THE IMPOSSIBLE UNIVERSE!Comment
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Hello Gentlemen,
I am working on an apple MacBook A2442 board pn 820-02098-A with a visible short on the PMIC U7700 MVK-PLUS as per the schematics
I have a donner board from apple macbook pro m1 A2338 PN 820-02020 and I saw that the PMIC U8100 TMLT46B0-JPE could be a possible replacement for the U7700
Can you please help me confirm if the U7700 can be replaced with U8100 ?
APL1098 is it the same as APL1096
Thank you very much in advanced
Ahmad -
1. RESET MACOS WITH IPSW
a. Power off MacBook, press and hold the power button to enter Recovery
b. Open Disk Utility, remove Macintosh HD
c. Reboot, connect to the network to Activate Mac.
d. Plug the C cord in the first port of the MacBook into the other Mac, then power off the MacBook
d. Hold down the Control (L) + Option (L) + Shift (R) + Power key combination for 10 seconds
e. Release the other keys, but keep holding the Power key for another 10 seconds
f. MacBook is returned to DFU, open Apple Configurator 2 on the other Mac, right-click... -
hi all, got this macbook with dead trackpad. after some investigation i found that fuse is bwlown. it's marked with a K on it. anyone kjnow it's value ? it is a 0402 package.
another problem is: i tried another trackpad that was working fine, but the feedback sensor was not. all volts are present, but the click mechanism isnt . -
Hi guys!
Got a Macbook Pro A1708, I had it open as I was replacing the display, I foolishly didn't disconnect the battery (I know), next thing the trademark smell of a blown cap. Grim.
I think one of the cables for the new display has touched something briefly on the main board and shorted something.
I disconnected the battery as quick as I could, but something has blown. Can't see any damage to any of the chips on either side of the main board.
Where do I start with this? All I have is a multimeter.
Any help appreciated! -
I am looking at an A2337 and found this for the order of power rails and what they do. Can this be confirmed before I dive into hunting down power rails that do not exist or are not neccisary?
- PPBUS_G3H (12.6V-12.8V)
- This is the main power rail that supplies power to the entire system. Check this rail first, as it must be present for other power rails to work.
- PP3V42_G3H (3.42V)
- This power rail is derived from PPBUS_G3H and is used to power the SMC (System Management Controller) and other essential circuits. It should be present if PPBUS_G3H is working correctly.
- PPVRTC_G3H (3.3V)
- This
- PPBUS_G3H (12.6V-12.8V)
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