A3114 Trackpad and keyboard not working

[kashitozu]

I have a MacBook that won't turn on (1).


I replaced the UF500 and UF400, and it worked perfectly.


I have another MacBook A3114 that won't turn on (2)

When I wanted to swap the motherboards and tried them in each other's chassis, I was surprised to find that in the first chassis (1), the trackpad and keyboard no longer worked.

In the other chassis (2), my motherboard (1) did the same thing: the trackpad and keyboard didn't work.

So I ordered another trackpad, ribbon cable, and another keyboard, but I'm getting the same result.



Where do you think the problem is coming from?

 

[2informaticos]

Inspect the connectors and their traces.
There may be mechanical damage.

 

[kashitozu]

Okay, let's see about that. When I reassembled it the first time, I lost the backlighting, so I replaced the UP700 and it worked perfectly.