Troubleshooting steps and diagnostics for my non-functional trackpad and keyboard on 2015 MacBook Pro with macOS 12.7.4

Question

namyaa Author

Level 1

4 points

Troubleshooting steps and diagnostics for my non-functional trackpad and keyboard on 2015 MacBook Pro with macOS 12.7.4

Hi. So, I am getting desperate.

Changed the battery, trackpad stopped working, changed trackpad flexcable, still does not work.

it shows up in system report and I can do the NVRAM, PRAM reset, my MagSafe indeed changes color.

Nothing In Apple diagnostics, nothing in logs, re installed OS, changed to Ubuntu and back to MacOS, still nothing.

[Re-Titled by Moderator]

MacBook Pro 13″, macOS 12.7

Posted on Mar 11, 2025 5:56 PM

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Answer 1

HWTech

Level 9

64,040 points

Mar 14, 2025 9:53 AM in response to namyaa

All things being equal and assuming no accidental liquid damage, then most likely the Trackpad Flex Cable is bad. The Trackpad Flex Cable has a high rate of failure for the 2015 model.

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Answer 2

namyaa Author

Level 1

4 points

Mar 30, 2025 8:49 AM in response to HWTech

I replaced it, and yet nothing changed, I can do all the smc power resets and stuff but when it boots it just stops working.

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Answer 3

HWTech

Level 9

64,040 points

Mar 30, 2025 10:22 AM in response to namyaa

Otherwise the issue is with the Trackpad itself or the Logic Board. I have seen people accidentally them when replacing the battery themselves.

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Troubleshooting steps and diagnostics for my non-functional trackpad and keyboard on 2015 MacBook Pro with macOS 12.7.4