Any chance on knowing which part of the fabric connects with which pin? My Smart Keyboard is acting up, I’m planing to probe three wire into the frantic and redirect them directly to the connecting pin, so that i can salvage the basic function of the keyboard.

i didn't know what possibly went wrong, i enclose the assembly and there's no gsm signal, so i re-open the back cover and install it again, then the signal comes right back.

I think you should remark when re-assembling the machine, you should pay attention to the metal clip in Step 9, the upper left screw position, it's easy to miss when assembling, because there are so many wires, and it may be very easy forgetting putting the metal clip back in place.