@nightfox939 said in 5V regulator failure (U3):
At this point, I'd lean toward option 2, but that's without an idea of lead-time and cost of a refurb. I know Duet is based in the UK, and shipping time to the US is either cheap or fast; not usually both.
We sometimes have refurb boards in the US, so it might not take too long to get one to you.