Black screen while installing

I am installing openSUSE tumbleweed 16.0 with the network installer (my usb stick is 4gb). I using usb tethering from my smartphone. At start it runs normally, the hardware detection part goes smoothly then a primitive type window opens where it downloads from 2 sites. But once it finishes downloading from the second site, the screen just turns black, nothing is responsive. Please tell me the solution