I cannot find a wiring diagram for your unit.
With luck the below manual for a MED9700 will be close or at least give you and idea how to proceed.https://drive.google.com/file/d/0BzIiBNwRIV4NN0N3dG84WnhfNG8/view
I am not sure I understand part of your post.
Did you replace the motor as well as the board?
Unplug the unit and attach one meter lead Neutral at the power cord.
Now measure to the white on the door switch, should be 0 ohms.
Measure to the blue on the door switch, should be 0 ohms with the door closed.
keep the door closed (switch activated).
Measure to P1-3 and P1-2, both should be 0 ohms.
Measure to 5M at the motor, should be 0 ohms
Measure to one side of the belt switch. should be in the 1 to 2 ohm range.
This can vary depending on the motor winding resistances.If each winding is 3 ohms then when measured in parallel it should give 1.5 ohms.
Measure to the light blue on the belt switch, should get the same motor winding resistance.
Measure to both sides of the thermal fuse, should see the motor resistance.
Measure to P1-4 should also be the motor resistance.
OK that is the motor wiring.
You may also want to check the individual main and start windings in the motor to be sure they are OK.
If all the above are OK.
Plug the unit in and measure from P1-3 to P1-4
You should see 120 volts.
It should drop to 0 volts when you start the unit.
Note use the lowest resistance scale/mode when doing the above.
Not that stupid continuity check mode on the meter as you do not know what the meter company thinks constitutes continuity.