My girlfriend has a 13-inch Mid 2013 MacBook Air, OS X 10.9.5. Yesterday, the keyboard and the trackpad stopped working. I connected a USB keyboard which works.
I believe it's a software problem because:
- The Power key still works (all the time)
- I can boot up in verbose mode (press Command + V while booting)
- I can do an SMC reset (Shift + Control + Option + Power Up)
- I can do a PRAM reset (Option + Command + P + R + Power Up)
All these things seem to work with the built-in keyboard, but as soon as the login window appears, the keyboard does not work anymore (except the power button).
Are there any more things I could try? Thanks for your suggestions!
Edit: I just checked the system.log (why didn't I do that earlier?) and the log is FILLED (like 100 messages per second) with these entries:
kernel: Error: AppleHSSPIController::InterruptOccurred Failed to transfer interrupt data with Err (0xe00002eb) kernel: Error: AppleHSSPIController::doSPITransfer NAK received from device kernel: Error: AppleHSSPIController::doSPITransfer CRC from device was invalid: computed 0xC03B, received 0x9F7D