I would suspect two different things, Either defective circuit board, or defective motor.
Leads on motor that attach to circuit board from Motor colors White and Black should =120V with fan switch in on position and door switch to furnace closed. If you do not have 120v to those two leads, your board is defective.
Leads on motor that attach to circuit board from motor one color is white, the other wire connects to circuit board, left top labeled HEAT-H on a call for heat, after 30-90 seconds into the cycle should have 120V. No voltage= defective board.
If you do have voltage to the motor, (120v), then I would try to replace the capacitor first. You can test that, but be careful, capacitors hold voltage, remove the wires from the capacitor with insulated pliers, short the two terminals using a screwdriver or pliers, then with your volt meter set for ohms you should go from 1000 ohms to 0 rather quickly...... if you see that, capacitor is ok, if it does not move at all on the meter, try replacing the capacitor. (usually though, a motor will be hot from trying to start)
Then lastly, the motor itself can be "ohmed" out. power off to the furnace remove the white and black leads from board, meter set for ohms, is there any continuity or resistance? If none, your motor is defective and has burnt out a winding.