I shorted P2_6; how do I identify replacement components?

While fully powered to 24V, the VBB/GND pins on P2_6 were shorted. There was a spark, then it stopped.

The board seems to function fine - except for this port, which no longer generates a voltage when I monitor it on a multimeter. I’m assuming that some component needs to be replaced, but how do I know which one?

TIA -e

Imported from wikidot

If your smoothieboard is a 5 driver, for the mosfet P2.6 Q9 is good luck for your troubleshooting ZXMN4A06