Cant figure out which file to replace and where it is. Can get my tab to recognize in adb devices mode but nothing is coming up when i type fastboot devices in adb. It is not recognized. I am stuck. Any help will be appreciated. I have got unlock code and the usb inf file but no light further.
You should ran unpack zip archive (from attachment), run Flashtool-drivers.exe and tick Flashmode & Fastboot drivers; Common drivers Lagan; Xperia Tablet Z drivers and reboot.
After that both flashmode and fastboot (VOL-Power, VOL+Power) will work.