Does the Timer Motor run?
Try a Dryer Cycle with the "Guard Switch" in both positions.
If it still doesn't work, then:
While set for a Drying Cycle,
while pushing the Start Switch, measure the voltages at its (3) Terminals.
(2) of the (3) should have 120v AC to chassis (a good ground)
If OK, then, while someone pushes the Start Switch,
measure for 120v AC from each side of the white Thermal Fuse to chassis.