When I press power on and vol+ and vol- simultaneously I have access to virtual keyboard. If I press F2, ESC, F7 and other keys – sometimes android 5.1 start normally. Once time also windows 10 start normally. My problem is that I cannot enter into the BIOS. I’ll tried ~200 times. Also once I enter to OS menu (white screen – system selector). Please help me enter to the BIOS.