LR-16 Stuck saying “Firmware Upgrade Do Not Switch Off”

How about if your device had a damaged internal component (like a flash memory with bad sector) which broke during the update? Do you know old is your device?
To be honest this is a very rare issue I don’t know any other user who experienced any similar issue with the device.
The only thing what I can suggest you to try update again to update. Download the firmware updater again from our website, try with another USB cable and connect to different USB port on your computer.
Sorry for the inconveniences.