Internal Keyboard and Trackpad not working
I have problem with my Macbook Air.
The internal keyboard and trackpad doesn't work anymore.
Keybord illumination is working fine and the power button also. If I plug in an USB mouse and / or keyboard both work fine.
I changed the cable from top case to logic board - still not working.
With the external keyboard, I did the hardware test - everything ok - and nvram reset - no change.
Some people told me about troubles with Sierra. Since yesterday I have the latest version - but still not working.
Does anybody have another idea to make the MacBook work again?
I need it!
Is there a possibility to identify the problem?
Software? Diagnosis Subsystem?
Problem Update: After a SMC reset the keyboard and mouse it's working for ~ 1 minute (with interuptions).
Is the problem the USB controller?
Does anybody have any advise?
My Macbook is working fine currently.
After one day, devices stopped working again.
Ist dies eine gute Frage?