Caveat... I am NOT an expert on CNC (Yet, LOL) however I do know a few things about electricity in general.
I would reccommend letting everything dry out and try to get as much out as you can. Then, check the Ohm readings on all your steppers and make sure they still read what they should. If your Ohms are OK, and nothing reads low you at least shouldn't blow anything in trying it with a new board. (At least a quick test.)
Hopefully someone with more experience can chime in.