Chosen Solution
I replaced battery by myself yesterday, and I think I broke one of the ribbons, and then my built-in trackpad and keyboard can’t be used anymore
I can still use my macbook pro by using external magic keyboard and mouse, but it seems I can’t disable my trackpad, it keep connecting and disconnecting constantly.
I can disable my internal keyboard using 3rd party app Karabiner, but still can’t disable my built-in trackpad because the option is not visible (in my sytem preference)
MacBook Pro (Retina, 13-inch, Mid 2014) My question: Can I replace the ribbon by myself? is it difficult? I came to the apple service yesterday but they won’t help, they said I have to change all (including the top case &keyboard) that’s insane and awfully expensive :(Is there any 3rd party app (like karabiner) to disable my built-in trackpad? alas, Karabiner can only disable my keyboard and not the trackpad. Kindly help, thank you. UPDATE: I fixed my Mac, more detailed on this link: Battery not detected, high speed fan, but it turned on without charger in summary: I learnt that I’m not supposed to unplug any ribbon connector before unplugging the battery (that’s the reason why I damaged my battery)I had to change trackpad flex ribbon and batterycalibrating the battery
If you wish to continue using your Mac with the external mouse you may just disconnect the trackpad cable from the logic board, that should prevent the system to try reconnecting to it and solve your problem. Trackpad cable can be replaced too but it’s a bit troublesome..have a look at the trackpad replacement guide so you can decide for yourself it that’s something you’re willing to do by yourself: MacBook Pro 13" Retina Display Mid 2014 Trackpad Replacement
