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.
Connect a USB physical keyboard to the tablet using the OTG cable. You need a physical USB keyboard and mouse to do things like entering BIOS or update firmware.
vcespon – thank U very much! 🙂 I connect USB keyboard using the OTG cable. Next i press Vol – and Vol + simultaneously, and press F7 in my keyboard. I get into the BIOS, and load default settings. Now everything is OK! Thanks again!