Installed new display can not adjust the light

Ive mounted a new Sony original display, need only move the battery, camera and motherboard to the "new" phone. But I can not adjust the light on the display. No matter what I do, min, max or automatically always remain at minimum light.
Updated Android, tested the service menus, everything seems to work. Disassembled and assembled again, the same result. Anyone have any ideas what to do?