The microwave is making a funny sound when turned on and it is popping the circuit breaker

It will pop the breaker if the breaker is overwhelmed.

Hi TIM BARR,
according to the user manual you should reset the circuit breaker.

See page 17 on manual:
http://www.jensenheavyduty.com/downloads/dl/file/id/186/mw900bk_owners_manual.pdf

Magnetron may be faulty. Have it checked by a qualified microwave engineer.

Something is shorted out. Leave the breaker off until you find it. You need an ohmmeter to find it, but look for the black marks for a hint.

That sound like arcing inside the food cavity. Maybe it needs cleaning? or some contamination is flashing over making the popping noises.

id say there is a bad connection somewhere and is arcing due to that which is causing it to trip breakers. so when you banged it and it started it made a connection and then stopped when you turned it on. open up the back abd just pull the wires anywhere connections are made and see if any are lose.

I would guess that the boiling water may not have been the cause ...
If you are lucky ... try this first:
Unplug or turn the circuit breaker off (if it is a built in unit). Wait an hour and then repower.
Odds are that will not clear things up ... but it is easy to try. Probably one of the electronic internals broke.
A number of different internal component problems could cause this heating failure in the microwave. It could be the magnetron, the high voltage transformer, the PC board, the diode, and the capacitor. This type of problem will need to be diagnosed and repaired by a service technician. Microwaves are inherently dangerous to service. This type of repair is not something that you want to try to do yourself. Internal capacitors in the microwave can retain a lethal electrical charge even when the microwave is completely unplugged. A microwave radiation leakage test should be performed on the unit using proper testing equipment following any internal component repair.

sounds like the mag fan went out and blew the internal fuse they are ceramic fuses 15 or 20 amp available at hardware stores ,if this blows again it could be the mag overheated,but the thermal breaker should have shut it off before this,thenit can also be your h.v. diode or capacitor shorted

• Make sure that the microwave is plugged into a grounded outlet. It must be a 3-prong outlet.
  
• Make sure the clock is set.
• Check to see if a programming sequence was entered. Sometimes improper programming or a program sequence such as delay start can cause the touch panel to be non-responsive. Unplug microwave or turn off house circuit breaker for 30 seconds. Plug back in, or reset circuit breaker, and try reprogramming unit.
  
• Check the house circuit breaker or fuse box. If the microwave is DEAD and there is no display and nothing works- the problem could be a blown fuse or tripped breaker.

It does sound odd for it to blow the breaker. It should blow the fuse, not the breaker. But looking at the exploded view diagram, I don't even see a fuse! Makes me wonder if this is some foreign model. *grin* In any event, you will need to replace all the door switches since they all have been stressed by the same overcurrent. Also be sure that all the switch mount and door latch parts are activating properly when you open and close the door. The switches (generic replacements) are widely available from local appliance parts stores. If you need any other parts, you can see an exploded view and parts list here: http://www.geappliances.com/shop/prts/