Aporte original por: Albert ,
Charge your device for at least 30 minutes and try to '''restart your device''' again: * Press and hold the Power button for 40 seconds. * If the '''device restarts before 40 seconds''' has passed, release the Power button. * If the '''device doesn’t restart''', release the Power button, and then press the Power button again to turn on the device. If the issue persists, attempt to '''Factory Reset''' using the built in device recovery mode: * Power device down completely via the Power Button. If the device is unresponsive to the 2-second Power Button press, attempt the 40-second Power Button press, which should cause full shutdown. * Make sure your '''device screen is completely off with no activity'''. * Enter Recovery Mode by pressing and holding '''Power+Volume''' Down for 5 seconds. * Once in recovery mode, use the '''volume keys''' to navigate to "'''wipe data/factory reset,'''" and the '''power''' button to select it. Please note that a factory reset will remove any content you have downloaded to your tablet.