I soft-bricked (the device would still power on and flash the Samsung screen before going dark) my Samsung Note 8.0 a few months ago after attempting to root it. After many hours of attempting to fix it, I decided to sell it on Craigslist. When people tried to lower my price to ridiculous levels, I ended up trying to fix it again. This is what I did to recover stock settings (note that the binary was still being recognized as official). And when you're ready to try rooting your device again, head over to Unlockr for a super-easy method that worked for me.