First thing my tablet sony xperia z4 just doing update software then it just shut down because my battery is low and I didnt even know a software update was coming while I'm watching videos. Then whenever I charge it would go to the update thingy and shut down again. and until theres an error below a dead android robot. And I cant't access to the recovery mode and when I press the power button and the volume up button it will just vibrate and there's a blue light at the upper right corner. And when I connect it to the laptop. There is a driver that says S1 fastboot. whenever there's a blue light at the upper right corner. I DONT KNOW HOW TO FIX THIS PLS HELLPP!! plss i really need a very big help. And I thank already to the person who can solve my problem!
