It would help if we knew what model BoB that is.
The Gecko doesn't sound right, but I've not tried that test, and can't get to mine to try it. Gecko is very good about making things right, and that 203V is guaranteed against almost anything except the Taliban. One thing which will kill it dead is if a piece of metal swarf gets inside the case and shorts out the circuitry. Anything else wrong just blows the fuse.
I would suggest that if you need to keep this machine working, you need to have a few spare parts on hand, including an extra Gecko.