Display doesn't works

[marcih]

But i heared a sound effect when plugging and deplugging usb cable on mobian. Turned backlight on and off with power button.

So i tried telnet with jumpdrive, and it worked except for display.
I didn't test all functionality. But It seems like most of components works fine. I was even able to change brightness of backlight.

So you're saying the backlight works but nothing is displayed? I think, judging from the schematics, that the screen has a separate power and "data" connectors, maybe the latter hasn't been connected properly in the factory. Either way, your best bet is to contact PINE64 and see what they tell you; they might say to try to check the connections or they might send you a new display outright.