Chosen Solution
Hello, Here is my issue : The keyboard (except the power button) and the trackpad are not responding. The keyboard lights but the shift key does not lights the led. The trackpad unlock well the “force touch”. The keyboard and trackpad works perfectly well when I boot on Linux or Windows USB key. Apple “Genius” Bar said : replace ribbon cable or replace all the top case (and give us money). Independent repairer does something, the problem is fixed when I pick up the computer. The issue reaper when I do a 30 minutes bus/walk to home (x3 times). We don’t understand nothing. At the beginning, the problem appeared intermittently : I’m at a place, it does not work. I walk to another place, 30 minutes walk, it is working again. The computer is on Mac OS X High Sierra 10.13.1 and the issue was only seen on the High Sierra version. Can someone help ? Thanks !
The issue is the trackpad cable, nothing else. Causes intermittent issues which is why it’s working in MacOs when picked up from the independent place (usually works/stops working when the lid is closed and opened). It works in other OS’ since they do not use certain signals travelling through the trackpad cable, which MacOS uses. At a guess, it has something to do with the SPI signals I believe; I think when you run Linux/Windows on a Mac they do not use SPI signals for the trackpad and instead use the “USB” trackpad signals, since the OS is emulated on the Mac. Basically, replace the trackpad cable and it will resolve your issue.
