My Hobby Pro Board quit while I was testing it with Mach3. With over a dozen succesful tests, this was the longest test todate, about 20 minutes into the program it quit with no warning. Now U7 gets hot and the 24v fan trys to start but then stops. When power is applied the X and Y motors jump but don't hold and their is no responce from Z.

Any help would be qreatly appreciated