Keyboard and Trackpad stopped working
Hi! I have a MacBook Air M1 (2020) and after two months of my warranty expiration the keyboard and the trackpad suddenly stopped working. No liquid was spilled and no other damage was made.
The backlit of the keyboard works but the keyboard and the trackpad are both dead. If I connect an external keyboard and mouse they work fine (also if I press the caps lock on the external keyboard the led on the internal keyboard does not lit up).
I tried everything on software level with no luck. I opened the laptop and cleaned all the connectors with isopropyl alcohol but nothing happened. The ribbon cable and the connectors have no visible damage. Also I disconnected the keyboard connector from the board and left only the trackpad part of the ribbon connected with no result.
Is it worth to give $20-$30 try a new ribbon or it may be a motherboard problem? Apple said that the cost of the repair could go up to $600.