Hi to all.
Mi problem is simple: When I slide the keyboard, no lights. Even in pure darkness
But if a use for example "keyboard led" app... it works.

I don't know what to do to fix this, any tip?
Is so difficult to write without any light in the night X_X
Thanks

more info.
Tried with two different motherboards, and same result.

more info again: I recently change the touchscreen and the big flex cable (the one with the videocalling camera)

Thanlks