Ivan say for sure without knowing your model number but it most likely does not have a reset button. Most have a thermal reset belt into he motor because it's cheaper than putting on a reset button.
Inspect the handle release pedal and pivot and where it latches on the vacuum body to see if something is broken, loose or missing. Inspect the on off switch pedal assembly, the switch and spring to see if something is malfunctioning, broken or missing. Contact me at [email protected] if you find you need any parts.
There is not a fuse as far as we know, and the pop was a short either at the switch or motor. With the circuit open, you will not get energy to the unit, thus the only way to fix the problem, is to get it to a technical station so a repairman can trace tract down the source of the problem.
a vacuum works by sucking in air and passing the filtered air through the motor to keep it cool
if the motor is overheating and there is no suction , then you have a blockage
If you cannot see it take it to a service center to have it cleaned out
If you can hear the motor but the beater bar doesn't turn, it's the belt that needs replacing. If you don't hear a thing when it's plugged in and turned on, then you need a new vacuum. Besides, the part, if you could buy one, may cost half of what a new unit will cost. Treat yourself!
Cheers,
Chance
San Diego, CA