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Model Number A1707. Released June 2017, this MacBook Pro features Kaby Lake processors up to the 2.8 GHz quad-core Intel Core i7 processor with Turbo Boost up to 3.8 GHz.

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Trackpad is clicking but the trackpad moves by itself!

Recently I bought a MacBook Pro 2017 A1707 trackpad is clicking but it doesn't track when you move your finger.

It moves by itself and sometimes opens the Lunchpad which is wired. I replaced the trackpad but it was the same then I changed the top case it didn't change anything.

Update (08/22/23)

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I checked them already, It has 12.60 V. I'wondering how it moves by itself.

Update (08/22/23)

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I found the pin 41 it is broken but it is ground. what can I do??

Update (08/22/23)

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It is ACT GND

Answer this question I have this problem too

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@armin1 anytime you have a disconnected pin etc.it is advisable that you repair this. Even GND is needed to function and missing ground can give weird results. I suggest you fix that connection and re-evaluate

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If you replaced the trackpad and the top case and the trackpad cable and you're still unable to use the trackpad properly then there is probably a larger issue with the main logic board or software. Have you tried reinstalling your OS? If the issue persists on a device with a new top case, trackpad, trackpad cable, and clean OS installation then the problem is almost definitely due to a fault on the main logic board. Good luck!

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"I wanted to reinstall the OS, but when I press the option key to choose a drive or flash drive, the trackpad is still experiencing the same issue. Do you think it will be okay if I proceed with the installation process??"

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I installed a fresh macOS, but it has the same problem.

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which part of the board needs to be checked?

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I'm not sure where the issue would likely be. I'd recommend removing the logic board carefully and then fully inspecting it for any signs of damage. Also, when you replaced the top case did you replace the battery as well?

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@zpl @armin1 here is the Trackpad connector diagram Check those pins on your board. Interesting to see that the trackpad has its own fuse. See if you have the required 12.6V on that. F4500 is just above the connector L4500 and C4500 are on the opposite side. Pin 1 of the connector is the one on the bottom left of your logic board.

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This is not as to interfere with the troubleshooting by @zpl but just to augment it.

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Nice! Thanks!

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Armin will be eternally grateful.
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