Keyboard and trackpad not working after battery replacement
Metin:
After doing a battery replacement in this Macbook A1534 2015, the trackpad and keyboard stopped working.
The keyboard backlight and power button still work, but the trackpad, haptic feedback, and the rest of the keys are dead.
External USB keyboard and mouse work through an Apple USB-C to A adapter.
After first reading about this problem, it looks like it was the flex cable from the mainboard to the trackpad that was damaged during the repair. I ordered a new one, but no change to the problem.
After this, I did a continuity check on all the pins on the flex cable with a multimeter and found that one of them did not have continuity. Then I tested the original flex cable, and the same pin did not have continuity on that one either. Because I didn't test the new cable before installing it, I now don't know if this pin is supposed to have continuity or not. Pictures show which pin I am talking about (pointing to the same pin on both ends of the cable).
[image|2973714]
[image|2973713]
I have tried to reseat the flex cable connector multiple times on both ends, resetting PRAM, booting in safe mode, and tried to do a SMC reset. SMC reset did not work, as this does not seem to work with an external keyboard (but I have disconnected the battery multiple times, which does the same thing as far as I know).
Now I feel a bit stuck on what to do and would greatly appreciate all help I can get to solve this problem.