I have a Chinese Android unit without physical buttons, stuck in a bootloop (the home screen appears but the unit resets after a few seconds). When I connect a USB keyboard and press ALT GR and PRT SCR at the same time, the machine reboots into recovery mode but displays 'no command'. I'm stuck from there on since you are meant to press specific hardware keys to bring up the menu. I want to reset the system back to factory settings. How can I bring up that menu with a USB keyboard?