Firmware flash bricked my Mini?

Sounds right to me, but a little digging found this forum post on the Mini Y axis: mini - y axis endstop and thwap thwap thwap

If the repositioning doesn’t get you sorted, you may want to reach out to support to see if it might be the same thing.

Not a problem, we are happy to lend a hand! These machines are a lot of fun, and once you get familiar of how they are supposed to operate it makes it much easier to track down what is wrong.