Originally Posted by hassanman1997
in my opinion, the drivers are not correctly installed
go to the website and download and load the drivers on your pc
its just weird that it says device connected with Usb debugging off when it is actually powered off
try charging your device, maybe the battery needs to be charged leave it there for atleast 30 mins then try the steps
let us know if you fixed it or not
I have a similar problem, I've flashed plenty of devices before, never briked a thing.
By unloking the bootloader the data partition of my brand new tablet Z went corrupted. I've tried to flash several firmware but none was succesfull (couldn't format data...), and finally it get totally bricked! no light, nothing... I was not even able to put it in flash mode (no light ever!).
I've tried after a while, I've read with some other Xperia devices, it would be possible to recover it after some time, by letting the battery die, then use some rubber trick to keep vol- pressed... you can find it in XDA forums what I'm talking about. However after a month my tablet was still dead. no light, no nothing!
I've sent it to warranty and the just said that "an alternative firmware was flashed" (voiding the warranty) "and has rendered the logic board unusable".... and they have to order a new unit!!
I feel so surprise that even the cheapest chinese tablet have an harware mode that allow to reflash and resuscitate it back to factory... even if the firmware is completely screwed, and a 600$ tablet for a simple bootloader unlock got totaly bricked.
I wonder if there is an "hardware" way to recover the tablet (I saw it's pretty easy to tear down the Xperia tablet Z), by directly accessing the NAND... or by accessing some PIN (well I know sony would have not leaked such information)