: Power off the device. Simultaneously press and hold Volume Up + Volume Down + Power .
Unlike regular apps, firmware resides in the tablet’s internal flash memory and controls how the device boots, updates, and recovers from errors. Tb-x605m Firmware
Flashing firmware (also known as a Stock ROM) is essentially performing a "clean install" of the tablet's operating system. Common reasons include: If the tablet is stuck on the Lenovo logo. : Power off the device