Dryer won't turn on after

Im going out on a limb here and say ... the breaker popped - your light exploded ... it will not start. You took a big surge hit and probably smoked the timer.

Unplug the machine - remove the back or the top to gain access to the wiring. With your volt/ohm meter start checking contunity particularly with the timer. The timer is only a switch, you know this right? When you are satisfied with your contunity checks, plug it in and scheck for voltages.

Good luck