I'm having the same problem with my 883. The only thing I can think of that may have affected it is moving the z axis by hand once and it stuck then moved quickly. I wonder if I may have burnt something out on the board from the current created?
-Power on the computer and 883 - tried powering them on in different order - same result
-The 883 control board light and fan come on
-Carbide Motion appears to connect to the 883
-I click on "Jog" and it just sits there with the message "homing the machine"
-The steppers are not locked so they aren't get any power sent to them
The link didn't help because there's not enough information to complete all of the steps unless you have enough prior knowledge.
Any other suggestions?