Tablet dead after unlocking BL
I tried to unlock the bootloader of my tablet (SGP 311) with the help of that guide: theunlockr.co(m)/2013/07/22/how-to-root-the-sony-xperia-z-video
The rooting procces was fine. And also the unlock worked. But after the flashing of the boot-twrp-v2.img file the tablet shut down and now doesn't react on any key. I cannot reach fastboot or flashmode. When inserting the usb cable while holding any key, nothing happens. I have to say that I couldn't even enter fastboot mode before (to unlock the bootloader). At this time also nothing happens, I could get to fastboot with a special app ( reboot I thing it is named).
What can I do now to get the device working again? Is the manufacturer warrenty void now?
Excuse my bad english,
best regards and thanks for every help