Answer to "My kindle won't turn on. Is it the battery?"To unlock the Kindle device, the easiest and fast solutions is reset your Kindle device. Press and holding down the power button for 20 seconds or more. Then turn the device back on by hitting the power button again. If this doesn’t work the first time, you can try holding the button down for 30 seconds or more. Most of the time, this will be all you have to do to make the Kindle Fire work again.