I suspect the issue may be the battery ribbon cable, which I’ve already ordered, but I wanted to see if anyone else has experienced this or knows what the problem might be.

Thanks in advance!

⟐ Commented Mayıs 05, 2026 at 5:06 GMT-7

I’ve searched everywhere: online stores, marketplaces, spare parts sites… nothing reliable, nothing in stock, nothing that I can actually trust.

This tiny cable is literally the only thing stopping me from fixing my MacBook. Without it, the device is useless. I really don’t want to replace the whole machine over something like this.

Does anyone here know where I can find this part?
Even used or refurbished would be totally fine at this point.

Any help would seriously mean a lot.

⟐ Answer edited Mayıs 05, 2026 at 1:50 GMT-7

Im not getting any sound from the speakers either but if I connect and bluetooth accessories it works straight away. The fans are also always on high speed.

Please help any solution is highly appreciated.

⟐ Commented Mayıs 04, 2026 at 14:46 GMT-7

The widgets are stored within /System/Library/CoreServicesBut Notes & Reminders are not there anymore (Maybe some others also have gone).

Unable to set weather location

Bluetooth Sharing has gone, but Bluetooth is on as I use a Magic Mouse II without any issues.

I also CANNOT change 'Open with default app' for example .mp3 or .mp4 opens with either Books, Music, Audacity, QT Player (All are different), even when I change to VLC as it always was with before via various methods NONE are changed so they all open with my preferred app. No matter what I try nothing seems to change anything, GET INFO (Set Default), Right Click (Open with other...) or even with App Cleaner app to set default app by extension etc....

This is really bugging me as I do not want to perform a complete clean install as I have a dual boot system and many files. We can rule out using Time Machine as that maybe will not solve it as from experience TM might still bring over the corrupted settings.... Is there a preferences file that I can delete or restore if so which one? Otherwise, system is running fine, these are my only issues noticed so far since a week or so. I have no dodgy software installed, nothing recently installed, no updates have been done (None to do anyway as all is up to date)..... I have booted into safe mode, rebooted as normal, but it has made no difference. Mystified on this as it is something I am usually good at fixing.

I found this link about widgets but no joy .

⟐ Answered Mayıs 04, 2026 at 8:41 GMT-7

Steps I've taken so far:

• Researched to see if this is even possible -- looks like the answer could be 'yes' based on some examples seen around the web
• Tried to find someone I could hire to do this (no luck thus far... hence why I'm here)
• Recently downloaded the a1398 schematics with the 820-3332-A board and fed it into some chatbots to potentially teach me how to do it myself (schematics link: https://f.ch1p.io/rjHAmTOU/820-3332-a.pd...)

Chatbot Summary of Instructions -> could use help determining if this would work

1. Isolation: Open up the case and remove the R5701 & R5702 resistors -> Ensures the MacBook's PCH doesn't interfere with whatever end computer I connect it with.

2. Data: Solder the Green (D+) and White (D-) wires of the USB cable to the connector side of those R5701 & R5702 resistor pads -> Corresponds to the 'USB_TPAD_P' and 'USB_TPAD_N' connections (Keyboard + trackpad data signals are combined via IPD cable)

3. Power: Solder the Red (5V) wire of the USB cable to the L5700 pad leading to the connector -> this small inductor/ferrite bead provides 5V to the PP5V_S4_TPAD rail via L5700, allowing the trackpad's circuitry to manage internal power needs

4. Ground: Solder the Black wire (GND) to the metal ears or shield of the J5800 connector -> ensures data signals are clean and will be recognized by an external computer

NOTE: In case you're wondering why I'm doing this...

- I have chronic myofascial pain in my upper extremities. This Macbook Pro model allowed me to go for long periods of time without pain. Having tried dozens of newer laptop models for Mac, Windows, and Chromebook, I have yet to find one with a keyboard/trackpad that performed as well for my pain as the MBP a1398. I could really use some help on how to do this myself.

⟐ Commented Mayıs 03, 2026 at 12:25 GMT-7

I’ve tried entering DFU mode and it did not work.

There is no sound, and the display does not turn on at all. I had exactly the same issue with a slightly older MacBook, it really seems like this is a systematic issue. Does anyone have an idea if this is true and a possible fix?

• Firefox/YouTube: Video plays without audio.
• Safari/YouTube: Sometimes no audio/video (but seeker moves, subtitles come). Sometimes video just stuck on loading—in which case after a while it tells me to “try restarting the device” if playback doesn’t resume.
• Apple TV: Media cannot load/play. Instantly media player is “killed” for the lack of a better term.
• Apple Music: Track auto skips to next. Similar to Apple TV. It attempts to play, can’t play, then instead of killing the media it skips to next song, repeat.
• Many streaming services in Firefox, Chrome, Safari: The playback technically begins, I can see the seeker/playhead move in time and subtitles come and go, but video is black and there’s no sound.

What’s common in all scenarios is there’s no sound. It happened abruptly one day. Default device is set to “MacBook Pro Speakers”.

More strangely, in the past week I've been having this problem, there have been two times when it became completely fine. That too, mid-playback. And randomly, it goes away too. For example, most recently when it started working again, I was watching a video on YouTube. I pause it for a bit to do something and when I come back and resume it, suddenly there's no sound again.

Further clarifications:

• I opened OBS Studio and added window capture of Firefox while playing a YouTube video. The sound bar was not moving at all.
• I have removed all Bluetooth devices and kept Bluetooth off while I have tested all this.
• It's not just media, no alert sounds are coming either, including the boot-up sound.
• Sound works fine when using a headphone (via aux for example).
• No crackling or weird noise to tell me that speakers are damaged in any way. When they started working again twice randomy during the last week, they worked 100% fine with complete clarity and volume.

Video here.

MacBook Pro 16-inch 2021 with Apple M1 Pro, 16 GB RAM, and Sequoia 15.5 operating system.

⟐ Commented Mayıs 02, 2026 at 9:54 GMT-7

And yet the laptop does not work as usual. First time it took ages until it could load the log-in screen. And it didn't got better afterwards either. The "SYMPTOMS" include:

• very long response time to basic commands such as close the tab or move the cursor;
• battery status is not shown - neither on the tab nor in settings; I suppose the computer does not "see" it;
• fans start to work at full speed as soon as I open the lid and continue like this - no matter the task - and albeit MBP is not even warm.

That's it. I've got to say that I didn't exchange the battery. The only way I came into contact with it is at a step where the battery power connector is disconnected (and then connected); and the same with the battery board data cable.

I've read here and there about those "symptoms" and it seems that (1) working slowly with (2) fans at full speed albeit no need to cool the computer down indicates that my MBP is running in a safe mode. Well, I would like to know whether you guys think this too.

Where could have I done sth. wrong in the assembly to cause this behavior? Or what else could be the reason?

After going through the manual (MacBook Pro (16 Zoll, 2019) Display tauschen - iFixit Reparaturanleitung) again I believe to have narrowed down the list of possible causes to just four connections that might not sit just right:

1. 1. Display board flex cable (German: Flachbandkabel; step no. 19)
2. 2. Antenna cables (Antennenkabel; steps no. 22-23)
   3. Battery board data cable (Akkuplatinen-Datenkabel; steps no. 11-14)
3. 4. Battery power connector (Akkustrom Stecker; steps no. 15-16)

But I don't want to disassemble the computer just yet, bcs. I am still not sure whether the cause is not sth. else, e.g. faulty display (item) or I broke sth. else during the process. So who knows what the cause of the behavior described might be? And how to fix it.

@danj thank for advice. However, yesterday after posting this question I chatted with FixBot here. It wasn't completely precise, but in general I understood that the issue most likely lies within the bad battery data cable connection. Without doing diagnostics first I risked and disassembled the cover again to check connections manually. Now it works.

It's interesting, I thought that the issue was that one or both sides of the battery data cable weren't fully in the socket. AI said (falsely) that gold pins a) should be put face down to the logic board and b) they need to be full way in to make full contact with the socket. Both of which are false, however. I checked a) with a YT-video where this model gets disassembled - gold pins should face upwards, as in the photo (guide is correct). And b) can be checked with another YT-video too, but also I tried it this way and that way to get it fully inside and it's impossible. I might have even bended one side of golden pins slightly. So DO NOT do it. It's just strange that they do not go fully inside and also aren't really fixed (only with those tiny ears).

However, after reseating this battery data cable with the battery power connector in reverse order (first connect the battery data cable to the logic board side, which is away from the middle of the computer, then battery power connector, then another side of the battery data cable to the battery side, which is to the middle of the computer), it works. ''''

//This discrepancy remains in the guide bcs. there they just say "redo in reverse order to assemble", which means that the battery power connector gets connected before the battery data cable and, according to the FixBot, can cause a short circuit, esp. if cable is not inserted straight. ‼️

So I did not change anything as I see it; also checked other parts I touched during screen replacement procedures: everything looked perfectly aligned and I did not touch them. But believe it or not, after putting each screw back, plugging in the computer and turning it on, I got this: a) no roaring fans; b) usual processing speed; c) battery status is back. So just as it should be. The conclusion is: it was either bad connection of the cable to the socket or a ZIF brake maybe was not flat entirely; or exactly the order of the steps, as AI suggested (however in YT-video they also do it as in the guide: first power, then data).

I hope my detailed answer will help anyone facing similar issues after reassembly.

⟐ Edited by author Nisan 30, 2026 at 7:07 GMT-7

⟐ Commented Nisan 30, 2026 at 6:47 GMT-7

I'm experiencing weird issues with my MBP 16" I9 2.3GHZ, 32GB, 1TB, 5500 4GB.

I bought it second hand in October 2024 and due to some strike by Canada Post it stayed for a whole month in a warehouse, dead battery on delivery, the Touch ID was kaput, tried many resets and installs and nothing (no DFU yet).

Some time later, I began having some Kernel Panics here and there, once a month, not so persistent. But lately it began to happen too much in the 10's one after another.

I used it for long gaming sessions with an external ssd ( bootcamp ) not a single crash.

The kernel panics happened a lot when :

Apps running : Chrome, PremierePro, After Effect, Spotify...
Connected to : NVME enclosure, external USB C hub ( 4K HDMI + 2 ext. HDD ), Bluetooth connected to my AV receiver.

Lately I switched to using Safari only and weirdly no more crashes:
NVME enclosure connected + Pr + Ae + Bluetooth active, w/o external USB C HUB

Here is a conversation with Gemini documenting the crashes : https://gemini.google.com/share/e49e55d1...

Gemini is pointing to a faulty power rail or even a faulty T2 Chip ( management + BridgeOs).

I've tried to having some experts to diagnose the issue and all of them gave me the same advice "change the motherboard or better buy a new one".

Louis Rossmann won't be happy with their diagnosis, but yeah I get the struggle of putting in some work and having it fail again.

Right now I sincerely think it's a software issue, I tend to run a lot of renders over Ae & Pr and not a single crash, CPU and temps all high for 1 or two hours, only when an app as Chrome or Spotify ( chromium based app ) runs that I have the unresponsive for sometime before rebooting from a panicked kernel.

The report always states a random unresponsive processes, but I fell like the smoking gun is held by Chrome or Spotify, my proof is simple, they do happen a lot when I push it to the extreme, open new tabs of very taxing website (IG, FB marketplace) the kind of website that has too many layers to it...

Is there anything that I'm missing here ? Faulty hardware acceleration ? I typically run my Mac on dedicated GPU only. Any other hardware ? Or purely some corrupted firmware ( T2 related ).

I'm willing to do a DFU restore in the coming days with another Mac to attempt a recovery of the TouchID and a clean install, even though one quick visit to an Apple Store and they told me it was best to replace it for 200$ ( after a 1 hours diagnosis ).

Tanks again !!

⟐ Answered Nisan 29, 2026 at 19:06 GMT-7

⟐ Commented Nisan 29, 2026 at 18:19 GMT-7

⟐ Answered Nisan 29, 2026 at 14:45 GMT-7

The power key is the only one still responding, so I've been using a USB keyboard and mouse, but that isn't exactly practical to bring to classes.

My assumption is that it's a loose cable, as I was told by the Genius bar that the keyboard and trackpad are controlled by the same cable (they told me my laptop was scrapped and I needed to purchase a whole new one...how about no?).

Does anyone have any ideas or advice? What does the cable for the trackpad/keyboard look like so I can open up the bottom and see if it's loose?

Thanks!

⟐ Commented Nisan 29, 2026 at 13:34 GMT-7

However, spot 1 seems to be occupied by a Torx screw. That's also the case for my laptop.

Both my laptop and online guides can't give me any idea about where the Phillips screw should go.

Thanks in advance.

Citation: https://documents.cdn.ifixit.com/MiYk55l...

I am surprised by the fact that the Phillips screw is supposed to sit on top of the Torc screw.

⟐ Commented Nisan 28, 2026 at 17:34 GMT-7

I wanted to try my hand at replacing the thermal compound, which was looking very crusty, on my old MacBook Pro. It was my first time, so I was quite prepared for any mistakes I might make. I was doing it for the experience.

As I removed the heatsink, I pulled it sideways rather than up, knocking it against the capacitor below the CPU.

After doing some dugging, I found out that it's the C1060 capacitor. See the boardview below and the relevant extract from the schematics.

The computer works. I ran Cinebench, and the kernel didn't panic or anything. I assume it's a matter of luck.

I am considering whether to buy a heatgun myself or give it to a professional. A heatgun costs around 80€. I have asked a local professional for a quotation.

Does anyone have any insight into this problem, any recommendations? Should I take it to a professional to get it fixed? Is it worth fixing? Is it worth buying the equipment to try and do it myself?

⟐ Commented Nisan 28, 2026 at 5:11 GMT-7

I have a Macbook Pro from early 2011 and I had problems with the video, I took it to a technician to reball it and it supposedly worked, at the same time it failed again and this time they told me they had changed the video chip.

In the end, it failed again and when I took it to repair it again it did not work again.

I finally bought a used logic board in china and was able to successfully install it as a replacement for the deceased one.

But I have the following problems:

1 The battery or battery charger does not work so the fans run at full speed.

2 I was able to get it to boot but it does not recognize the SSD.

3 I put the original hard disk (unfortunately it had been used for a windows pc) and tried to install different versions of OS

- Yosemite USB installation (failure to finish preloading the USB, the computer restarts and the installation begins again)

- Installation via USB of El Capitan (failure to finish preloading the USB similar to Yosemite) but then I was able to install it with "Clover" and the installable image of El Capitan. The installation was successful but when the mac tries to start it reboots before finishing the progress bar with the apple at the start. This installation only works failsafe and I cannot start the diagnostic mode (D, cmd + D, option + D) nor the recovery mode (R, command + R)

- Recovery using time machine, since I have a copy of High Sierra, I recovered the complete installation but the behavior is the same. Fails to start unless in safe mode.

- Currently installing a minor version (mountain Lion) install the first stage, restart and start installing the second stage. it always restarts after 30% and starts again.

4 In the El Capitan version I uninstalled the drivers for the dedicated video card, hoping that was the problem, but I never got it to boot normally.

I also did all the possible updates and only the installation of "MacBook Pro EFI Firmware Update 2.7" fails because when the Mac restarts to do the update, it restarts again and again and only continues in safe mode. when I look for if something needs to be updated, "MacBook Pro EFI Firmware Update 2.7" reappears

Please if you can tell me what steps to follow or some guide would be saving me.

I am in Argentina and the prices to take this equipment to an official service are exorbitant and unreliable.

Hi @danj , you really blew my mind!

First of all thanks for your help and advice, in my many searches I found many of your contributions and they were always very helpful.

I read quite a bit about it and to try and rule out that this was the problem and did the following:

Using my other computer (macbook pro early 2013) and internet recovery I installed mountain lion on a 16Gb pendrive. I put it in the macbook pro 2011 and by pressing option I told it to boot from it.

To my surprise and for the first time it managed to start!

I even managed to install the update "EFI Firmware Update 2.7" ...

My joy ceased when it rebooted for no reason while trying to install the Safari update. (started downloading update and failed)

The mac rebooted again and while loading the OS it rebooted again! This behavior persists as long as a reboot failure occurs and I think I manage to stop this reboot cycle when I hold the power button and turn on again while pressing the option key to choose usb as startup.

As you had indicated to me that the cable could be the cause of the failure. Disconnect the hard drive cable from the logic board. I started again and it rebooted again :( again trying to update Safari.

Just in case, also disconnect the cable from the optical drive.

With both units disconnected it continues to fail.

Currently, it only has a 16 Gb USB as a hard drive.

Since I couldn't update Safari, I downloaded Chrome and managed to install it.

But as soon as I want to start Chrome and the icon starts jumping on the dock while loading, it restarts again ...

Here's my suspicion: Could this be a matter of memory? Currently, it has two 4Gb memories and before doing all these tests I had changed them for two 2Gb and it also failed.

Update (09/02/2021)

Here it is the report I got booting into safe mode

Anonymous UUID:       FA68BE48-FBB3-5DF7-60AE-31C84802DD15

Mon Jan  1 13:45:58 2001

• Panic Report *

panic(cpu 7 caller 0xffffff800578687f): Kernel trap at 0xffffff7f87f37964, type 14=page fault, registers:

CR0: 0x000000008001003b, CR2: 0x0000000000000033, CR3: 0x00000000092ca000, CR4: 0x00000000000626e0

RAX: 0x0000000000000000, RBX: 0xffffff801e685580, RCX: 0x0000000000000202, RDX: 0xffffff80e614b77d

RSP: 0xffffff910ff7a890, RBP: 0xffffff910ff7a8c0, RSI: 0xffffff910ff7a960, RDI: 0xffffff801e685580

R8:  0xffffff910ff7a700, R9:  0x0000000000000008, R10: 0x0000000000000010, R11: 0x0000000000000000

R12: 0xffffff801e685580, R13: 0xffffff7f87fa7658, R14: 0x0000000000000000, R15: 0x0000000000004006

RFL: 0x0000000000010202, RIP: 0xffffff7f87f37964, CS:  0x0000000000000008, SS:  0x0000000000000000

Fault CR2: 0x0000000000000033, Error code: 0x0000000000000000, Fault CPU: 0x7, PL: 0, VF: 1

Backtrace (CPU 7), Frame : Return Address

0xffffff910ff79d10 : 0xffffff800566ae76

0xffffff910ff79d60 : 0xffffff8005794484

0xffffff910ff79da0 : 0xffffff8005786654

0xffffff910ff79e10 : 0xffffff800561ce60

0xffffff910ff79e30 : 0xffffff800566a8ec

0xffffff910ff79f60 : 0xffffff800566a6ac

0xffffff910ff79fc0 : 0xffffff800578687f

0xffffff910ff7a130 : 0xffffff800561ce60

0xffffff910ff7a150 : 0xffffff7f8636f553

0xffffff910ff7a290 : 0xffffff8005cb7ea7

0xffffff910ff7a2e0 : 0xffffff8005cb79b3

0xffffff910ff7a320 : 0xffffff8005cb5662

0xffffff910ff7a360 : 0xffffff800566ad31

0xffffff910ff7a3b0 : 0xffffff8005794484

0xffffff910ff7a3f0 : 0xffffff8005786654

0xffffff910ff7a460 : 0xffffff800561ce60

0xffffff910ff7a480 : 0xffffff800566a8ec

0xffffff910ff7a5b0 : 0xffffff800566a6ac

0xffffff910ff7a610 : 0xffffff800578687f

0xffffff910ff7a780 : 0xffffff800561ce60

0xffffff910ff7a7a0 : 0xffffff7f87f37964

0xffffff910ff7a8c0 : 0xffffff7f87f4f054

0xffffff910ff7a900 : 0xffffff7f87f4edbc

0xffffff910ff7a950 : 0xffffff7f87f4ed03

0xffffff910ff7a9b0 : 0xffffff7f87f4c4b1

0xffffff910ff7a9f0 : 0xffffff7f87f516d8

0xffffff910ff7aa20 : 0xffffff7f87f55d54

0xffffff910ff7aa70 : 0xffffff7f87f76e08

0xffffff910ff7aaf0 : 0xffffff7f87f781ad

0xffffff910ff7ab30 : 0xffffff7f87f78e9e

0xffffff910ff7ab80 : 0xffffff7f87f70360

0xffffff910ff7abc0 : 0xffffff7f87f74ac1

0xffffff910ff7ac20 : 0xffffff7f87f2cf23

0xffffff910ff7acb0 : 0xffffff7f8635ce99

0xffffff910ff7ad00 : 0xffffff7f8635c34c

0xffffff910ff7ad20 : 0xffffff7f87fffa71

0xffffff910ff7ad60 : 0xffffff7f880230b9

0xffffff910ff7bd20 : 0xffffff7f880244b6

0xffffff910ff7bd70 : 0xffffff7f88025f91

0xffffff910ff7be10 : 0xffffff8005c6b2c6

0xffffff910ff7be60 : 0xffffff7f88009240

0xffffff910ff7be90 : 0xffffff7f880093de

0xffffff910ff7beb0 : 0xffffff8005c6e685

0xffffff910ff7bf00 : 0xffffff8005c7135b

0xffffff910ff7bf50 : 0xffffff8005c73076

0xffffff910ff7bfa0 : 0xffffff800561c557

      Kernel Extensions in backtrace:

         com.apple.driver.AppleSMC(3.1.9)[0249444C-80D4-3184-9060-F70DA3BEB17D]@0xffffff7f86364000->0xffffff7f86380fff

            dependency: com.apple.iokit.IOACPIFamily(1.4)[95DA39BB-7C39-3742-A2E5-86C555E21D67]@0xffffff7f8635b000

            dependency: com.apple.iokit.IOPCIFamily(2.9)[F763C275-306F-358F-B6B0-0FD93486BD5F]@0xffffff7f85e94000

         com.apple.driver.AppleACPIPlatform(6.1)[B0282791-F78C-3A3D-A829-629AD847C7EA]@0xffffff7f87f27000->0xffffff7f87fc2fff

            dependency: com.apple.iokit.IOACPIFamily(1.4)[95DA39BB-7C39-3742-A2E5-86C555E21D67]@0xffffff7f8635b000

            dependency: com.apple.iokit.IOPCIFamily(2.9)[F763C275-306F-358F-B6B0-0FD93486BD5F]@0xffffff7f85e94000

            dependency: com.apple.driver.AppleSMC(3.1.9)[0249444C-80D4-3184-9060-F70DA3BEB17D]@0xffffff7f86364000

BSD process name corresponding to current thread: kernel_task

Mac OS version:

17G14042

Kernel version:

Darwin Kernel Version 17.7.0: Fri Oct 30 13:34:27 PDT 2020; root:xnu-4570.71.82.8~1/RELEASE_X86_64

Kernel UUID: 5E83A13A-32F5-3604-8591-50E2F2F70DC6

Kernel slide:     0x0000000005400000

Kernel text base: 0xffffff8005600000

__HIB  text base: 0xffffff8005500000

System model name: MacBookPro8,2 (Mac-94245A3940C91C80)

System uptime in nanoseconds: 23321620454

last loaded kext at 23023073418: com.apple.kext.AMDLegacySupport 1.6.8 (addr 0xffffff7f88fa1000, size 1187840)

loaded kexts:

com.apple.iokit.AppleBCM5701Ethernet 10.3.1

com.apple.driver.AirPort.Brcm4360 1250.20.1a4

com.apple.driver.AppleIntelSNBGraphicsFB 10.0.4

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.driver.SMCMotionSensor 3.0.4d1

com.apple.filesystems.autofs 3.0

com.apple.driver.AppleHDAHardwareConfigDriver 281.52

com.apple.driver.AppleHDA 281.52

com.apple.driver.AppleGraphicsDevicePolicy 3.20.18

com.apple.AGDCPluginDisplayMetrics 3.20.18

com.apple.driver.pmtelemetry 1

com.apple.iokit.IOUserEthernet 1.0.1

com.apple.iokit.IOBluetoothSerialManager 6.0.7f22

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.eficheck 1

com.apple.driver.AppleHV 1

com.apple.driver.AGDCBacklightControl 3.20.18

com.apple.driver.AppleLPC 3.1

com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

com.apple.driver.AppleFIVRDriver 4.1.0

com.apple.driver.AppleThunderboltIP 3.1.1

com.apple.driver.AppleBacklight 170.12.6

com.apple.driver.AppleSMCLMU 211

com.apple.driver.AppleMuxControl 3.20.18

com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0

com.apple.driver.AppleMCCSControl 1.5.5

com.apple.iokit.IOBluetoothUSBDFU 6.0.7f22

com.apple.driver.AppleUSBTCKeyEventDriver 254

com.apple.driver.AppleUSBTCButtons 254

com.apple.driver.AppleUSBTCKeyboard 254

com.apple.driver.AppleIRController 353

com.apple.driver.AppleFileSystemDriver 3.0.1

com.apple.filesystems.hfs.kext 407.50.6

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.BootCache 40

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0

com.apple.AppleSystemPolicy 1.0

com.apple.iokit.SCSITaskUserClient 404.30.3

com.apple.filesystems.apfs 748.51.0

com.apple.driver.AppleSDXC 1.7.6

com.apple.driver.AppleFWOHCI 5.5.9

com.apple.driver.AppleAHCIPort 329.50.2

com.apple.driver.AppleACPIButtons 6.1

com.apple.driver.AppleRTC 2.0

com.apple.driver.AppleHPET 1.8

com.apple.driver.AppleSMBIOS 2.1

com.apple.driver.AppleACPIEC 6.1

com.apple.driver.AppleAPIC 1.7

com.apple.driver.AppleIntelCPUPowerManagementClient 220.50.1

com.apple.nke.applicationfirewall 186

com.apple.security.TMSafetyNet 8

com.apple.security.quarantine 3

com.apple.driver.AppleIntelCPUPowerManagement 220.50.1

com.apple.kext.AMDLegacySupport 1.6.8

com.apple.iokit.IOFireWireIP 2.2.9

com.apple.iokit.IOEthernetAVBController 1.1.0

com.apple.iokit.IO80211Family 1200.12.2

com.apple.driver.mDNSOffloadUserClient 1.0.1b8

com.apple.driver.corecapture 1.0.4

com.apple.kext.triggers 1.0

com.apple.driver.DspFuncLib 281.52

com.apple.kext.OSvKernDSPLib 526

com.apple.iokit.IOSurface 211.15

com.apple.iokit.IOSerialFamily 11

com.apple.driver.AppleSSE 1.0

com.apple.driver.IOPlatformPluginLegacy 1.0.0

com.apple.driver.IOPlatformPluginFamily 6.0.0d8

com.apple.driver.AppleHDAController 281.52

com.apple.iokit.IOHDAFamily 281.52

com.apple.iokit.IOAudioFamily 206.5

com.apple.vecLib.kext 1.2.0

com.apple.driver.AppleSMBusPCI 1.0.14d1

com.apple.driver.AppleBacklightExpert 1.1.0

com.apple.iokit.IONDRVSupport 519.21

com.apple.driver.AppleGraphicsControl 3.20.18

com.apple.AppleGPUWrangler 3.20.18

com.apple.AppleGraphicsDeviceControl 3.20.18

com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0

com.apple.driver.AppleThunderboltEDMSink 4.1.4

com.apple.driver.AppleSMBusController 1.0.18d1

com.apple.iokit.IOGraphicsFamily 519.23

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 6.0.7f22

com.apple.iokit.IOBluetoothHostControllerUSBTransport 6.0.7f22

com.apple.iokit.IOBluetoothHostControllerTransport 6.0.7f22

com.apple.iokit.IOBluetoothFamily 6.0.7f22

com.apple.driver.AppleUSBMultitouch 262

com.apple.driver.usb.IOUSBHostHIDDevice 1.2

com.apple.driver.usb.cdc 5.0.0

com.apple.driver.usb.networking 5.0.0

com.apple.driver.usb.AppleUSBHostCompositeDevice 1.2

com.apple.driver.usb.AppleUSBHub 1.2

com.apple.filesystems.hfs.encodings.kext 1

com.apple.driver.AppleUSBMergeNub 900.4.1

com.apple.driver.AppleUSBHostMergeProperties 1.2

com.apple.driver.usb.AppleUSBHostPacketFilter 1.0

com.apple.iokit.IOUSBFamily 900.4.1

com.apple.iokit.IOSCSIMultimediaCommandsDevice 404.30.3

com.apple.iokit.IOBDStorageFamily 1.8

com.apple.iokit.IODVDStorageFamily 1.8

com.apple.iokit.IOCDStorageFamily 1.8

com.apple.driver.AppleThunderboltDPOutAdapter 5.5.5

com.apple.driver.AppleThunderboltDPInAdapter 5.5.5

com.apple.driver.AppleThunderboltDPAdapterFamily 5.5.5

com.apple.driver.AppleThunderboltPCIDownAdapter 2.1.3

com.apple.driver.AppleXsanScheme 3

com.apple.iokit.IOAHCISerialATAPI 267.50.1

com.apple.iokit.IOAHCIBlockStorage 301.40.2

com.apple.driver.AppleThunderboltNHI 4.7.3

com.apple.iokit.IOThunderboltFamily 6.7.10

com.apple.iokit.IOFireWireFamily 4.7.2

com.apple.iokit.IOAHCIFamily 288

com.apple.driver.usb.AppleUSBEHCIPCI 1.2

com.apple.driver.usb.AppleUSBUHCIPCI 1.2

com.apple.driver.usb.AppleUSBUHCI 1.2

com.apple.driver.usb.AppleUSBEHCI 1.2

com.apple.driver.AppleEFINVRAM 2.1

com.apple.driver.AppleEFIRuntime 2.1

com.apple.iokit.IOSMBusFamily 1.1

com.apple.iokit.IOHIDFamily 2.0.0

com.apple.security.sandbox 300.0

com.apple.kext.AppleMatch 1.0.0d1

com.apple.driver.DiskImages 480.60.3

com.apple.driver.AppleFDEKeyStore 28.30

com.apple.driver.AppleEffaceableStorage 1.0

com.apple.driver.AppleKeyStore 2

com.apple.driver.AppleUSBTDM 439.70.3

com.apple.driver.AppleMobileFileIntegrity 1.0.5

com.apple.iokit.IOUSBMassStorageDriver 140.70.2

com.apple.iokit.IOSCSIBlockCommandsDevice 404.30.3

com.apple.iokit.IOSCSIArchitectureModelFamily 404.30.3

com.apple.iokit.IOStorageFamily 2.1

com.apple.driver.AppleCredentialManager 1.0

com.apple.driver.KernelRelayHost 1

com.apple.iokit.IOUSBHostFamily 1.2

com.apple.driver.usb.AppleUSBCommon 1.0

com.apple.driver.AppleBusPowerController 1.0

com.apple.driver.AppleSEPManager 1.0.1

com.apple.driver.IOSlaveProcessor 1

com.apple.iokit.IOReportFamily 31

com.apple.iokit.IOTimeSyncFamily 680.15

com.apple.iokit.IONetworkingFamily 3.4

com.apple.driver.AppleACPIPlatform 6.1

com.apple.driver.AppleSMC 3.1.9

com.apple.iokit.IOPCIFamily 2.9

com.apple.iokit.IOACPIFamily 1.4

com.apple.kec.pthread 1

com.apple.kec.Libm 1

com.apple.kec.corecrypto 1.0

EOF

Model: MacBookPro8,2, BootROM MBP81.0047.B27, 4 processors, Intel Core i7, 2 GHz, 8 GB, SMC 1.69f1

Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In

Graphics: AMD Radeon HD 6490M, AMD Radeon HD 6490M, PCIe

Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393955353436392D3034362E4130304C4620

Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0198, 0x393930353436392D3130362E4130304C4620

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 (5.106.98.102.30)

Bluetooth: Version 6.0.7f22, 3 services, 27 devices, 0 incoming serial ports

Network Service: Wi-Fi, AirPort, en1

Serial ATA Device: KINGSTON SA400S37240G, 240,06 GB

USB Device: USB 2.0 Bus

USB Device: Hub

USB Device: IR Receiver

USB Device: USB 2.0 Bus

USB Device: FaceTime HD Camera (Built-in)

USB Device: Hub

USB Device: Apple Internal Keyboard / Trackpad

USB Device: BRCM2070 Hub

USB Device: Bluetooth USB Host Controller

Thunderbolt Bus: MacBook Pro, Apple Inc., 22.1

⟐ Answered Nisan 28, 2026 at 0:36 GMT-7

1) While typing the key jumps to different places in the document.

2) The battery charges to 100%, in approx 4hrs to 50% then dies to 1% shut down. Apple suggests reset SMC, But the LEFT SHIFT KEY will not reset SMC.

⟐ Answer edited Nisan 27, 2026 at 18:29 GMT-7

Thank you

⟐ Commented Nisan 27, 2026 at 9:55 GMT-7

This is the second time I’ve replaced my battery with an ifixit battery and this is the second time this issue has came up. After replacing the battery and running the calibration cycle, I would use my laptop on its battery and somewhere around 70%-60% battery level, the battery level would just shoot down to 7%.

Initially on the first time around with replacing the battery, I just figured they sent me a faulty battery, but didn’t have time to buy another one and change it out, so i lived with the power adapter. I finally had a chance to replace it to a new battery, but the same thing just happened. Now, Im hoping to find some answers from you all if I have another faulty battery or some other insight on what it might can be.

Appreciate whatever insight provided!

UPDATE

Here’s a photo with the coconut battery app. In the screenshot under the “BATTERY (last 12 hours)” you can see the instant drop in battery level.

UPDATE #2

at 50% charge

at 100% charge

UPDATE #3

Screenshot charging from 0% to 50%

⟐ Answered Nisan 27, 2026 at 7:38 GMT-7

Battery Terminal & Data PORT. On my MacBook Pro 16” M1 Max, snapped off or broke off when putting in new battery and I believe that was the reason why the battery it was not being recognized by the board because of the logic board connector,

I’m in desperate need for someone who can help me fix or find the parts name or number

(Battery Terminal & Data PORT)

because I’ve tried, can’t find or get anything

⟐ Answer accepted Nisan 27, 2026 at 7:20 GMT-7