MacBook Air, Keyboard, Trackpad
The Keyboard and Trackpad are unresponsive.
Here are the things I have tried over the past few months.
1- Update OS X to Yosemite
2- Reset PRAM
3- Reset SMC
4- Replaced Cable from Keyboard to Motherboard
5- Replace TrackPad
6- Replaced Keyboard
7- Updated Firmware
The power button is intermittently responsive.
I have to start the MacBook Air by shorting two contacts on the logic board.
I have disconnected the battery and reconnected.
Does the battery play a role in grounding or completing a circuit?
Are their hardware troubleshooting steps I can take?
I have also run the AHT and checked the system report, both state the computer passed inspection.
Any suggestions? Or resolutions?
Is this a good question?