MET8665XS00 will not turn on

limited info generic answer will need a multi meter to test circuits -[dont look broken ] is not a solution to your problem

If it's a year old and under a 5 year warranty then it will be covered under the warranty and shouldn't cost you a dime. If it happens again then speak to someone about getting a different range since you may have received a lemon.

The broiler is a different element. Sounds like your main (bottom) element is out. Turn off breaker and remove. To test, use an ohm meter and ohm out the element. If yuor meter reads 0 or OL (open load) your element needs to be replaced.

Electric water heater can be repaired by homeowner.

Four things can cause NO hot water:
1) ECO red reset button tripped. Remove top cover on water heater, push red reset button on thermostat. Put insulation and cover back over thermostat.
2) Circuit breaker is tripped, circuit breaker bad, or wire loose in breaker box. Turn breaker on-off and listen for crackling or fizzing sound, and burned smell. Test breaker for 220Volts. Test top two screws on upper thermostat to see if water heater has electricity.
3) Bad upper thermostat. Replace upper thermostat.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html
4) Bad upper element. Test upper element.
http://waterheatertimer.org/How-to-test-water-heater-element.html

Check the thermostat if it shorted to the wall somehow or if the element cracked which can cause that too

check the continuity on both your elements as well as the wiring to the unit itself.
if both the elements are good and the wiring is fine then you need to replace the electronic control board

Check to see if the duel circuit breaker is tripped on one side.

Sounds like a shorted wire or something grounding.
Slide out range and unplug and take off bake and look around for a short either at the bake or broil element ot at the terminal where the cord connects.

It could be one of the elements is shorting out causing the breaker to trip. Try using one burner at a time to see which one causes the short.

It is most likely the pop came from a relay on the control board if the elements checked ok but not getting power to them. This is fairly common on fridgidaire ranges. Replace the oven control. Usually the control overlay is sold as a separate piece.