My front cam not work (Freeze when I tap "change cam")

I buy one Iphone 5s... Home Button, Tochscreen and Front Cam problems...

Home and Touch SOLVED, the problem in mother board...

But the front camera:

I put other front cam, another conector... And not run...

(Sensor and others parts is OK)

Anybody help me :(

Can be one component? i have other morherboard, i can take off the components and put on my iphone 5s

My motherboard is like that: https://www.google.com.br/imgres?imgurl=...

Anybody have the schem of this motherboard? i downloaded another one, but its not the same model...