MacBook Air 13 2011 keyboard issues?

Question

Iron

There is a MacBook Air 13 Mid 2011.
The keys of the top row of the keyboard from Q (Y) to O (Sch) inclusive have stopped working.
There was no bay. Even if you remove the button itself and press the board - the button is not pressed. All loops seem to be in order. What could be the problem?

Answer 1

In airs, the cl-ra is connected to the touchpad, the cl-ry controller is located on the touchpad, it converts the signals to USB format and then through the touchpad cable to the motherboard. Since only some of the keys do not work, the problem is either in the keyboard, or along the way (cl-ry connector on the touchpad) or in the touchpad itself (cl-ry controller on it). From experience 90% that the keyboard itself. And as a rule, these are the consequences of flooding, customers often do not know that the computer was flooded, because someone else could have flooded it) In order for the cl-ra to fail, a couple of drops may be enough if it fails. There were cases that the cl-ra was flooded and refused after the buttons were wiped with a damp cloth.
In your case, the diagnostics will be reduced to connecting a new cl-ry on the weight, if the same, then connect a new touchpad. There are no other options.