Disclaimer: The author is not responsible for bricked drives. Always back up important data before flashing hardware firmware.
If the drive ejects at random or disappears from Device Manager, roll back the driver (not firmware) via Windows. samsung se-506 firmware update
You have an SE-506CB with TS00 (original factory firmware) and you are trying to burn Verbatim BD-R 50GB discs from a new batch. Disclaimer: The author is not responsible for bricked drives