How do I open it up to look for a blown fuse to circuit breaker?

Unplug,then plug back in,wait 10 minutes,or try another outlet,circuit breaker could of turned off at control panel in house,reset it.

the panel display is fried. you'll need to remove and replace it...this the sort of thing you enjoy doing?

Unless you are good at this troubleshooting, with a multimeter, circuit diagram, and so forth, I'd take it to a service tech. You may find that a quote will approach the cost of a new one, or that parts are not so easily obtained now.

I'd say a fuse has blown or thermal cutout failed, if everything is dead.

You should be aware that the magnetron circuit in these things generates a lethally high voltage which can be present even when unplugged from the wall.

Yau say a few conflicting things. First you wonder if it blew a breaker, and then say you have power to the receptacle. If you have poer to your receptacle your breaker if not tripped. There are NO breakers Inside of the Microwave. Only 1 time fuses. So, if your init is dead it has probably blown a fuse inside of the unit. If that is the case. Probably shorted HIgh volt capacitor would be my first guess. If it is jsut dead. it can be other things than just a blown fuse. bad thermal protectors, bad low voltage transformer on main circuit board. Burnt wires. Anything that will cause it to lose power inside the unit. From bad parts to bad connections.

The main fuse is blown, "ceramic type" usually caused by a defective door switch.

from online Microwave Repair Manual: Totally dead oven (no lights, no clock, no display, no fan, no heat...)First, check power to the outlet using a lamp or radio you know works. The fuse or circuit breaker at your service panel may have blown/tripped due to an overload or fault in the microwave oven or some other appliance. You may just have too many appliances plugged into this circuit - microwave ovens are high current appliances and should be on a dedicated circuit if possible. If you attempt to run a heating appliance like a toaster or fryer at the same time, you *will* blow the fuse or trip the circuit breaker. A refrigerator should never be plugged into the same circuit for this reason as well - you really don't want it to be without power because of your popcorn!

If you find the fuse blown or circuit breaker tripped, unplug everything from the circuit to which the microwave is connected (keep in mind that other outlets may be fed from the same circuit). Replace the fuse or reset the circuit breaker. If the same thing happens again, you have a problem with the outlet or other wiring on the same branch circuit. If plugging in the microwave causes the fuse to blow or circuit breaker to trip immediately, there is a short circuit in the power cord or elsewhere.

The microwave oven may be powered from a GFCI outlet or downstream of one and the GFCI may have tripped. (Removing a broken oven lamp has been known to happen.) The GFCI outlet may not be in an obvious location but first check the countertop outlets. The tripped GFCI could be in the garage or almost anywhere else! Pushing the RESET button may be all that's needed.

Next, try to set the clock. With some ovens the screen will be totally blank following a power outage - there may be nothing wrong with it. Furthermore, some ovens will not allow you perform any cooking related actions until the clock is set to a valid time.

Assuming these are not your problems, a fuse has probably blown although a dead controller is a possibility.

While you can do some repairs on your microwave, what you don't know can kill you... even on an unplugged microwave, so make sure you understand the dangers and how to reduce them before you try anything inside a microwave. If you want to do more yourself, go to the link at the top of this post.

It sounds like an internal fuse has blown. Unplug unit and carefully open the top cover to provide access to the A.C. power cord entry point. Hopefully the fuse is located in that area and is the older style 1/2" long glass or ceramic body with metal endcap on each end. ONLY REPLACE WITH A FUSE THAT HAS IDENTICAL ELECTRICAL RATINGS! After replacing the fuse and top cover reconnect the unit to the A.C. outlet and check to see if it is still dead. Still dead = repair shop time.

NOTE: Use a "fused" A.C. outlet strip (usually 6 outlets with circuit breaker) for your "after fuse replaced" testing. This gives you additional protection against accidentally tripping a breaker in your homes electrical panel.

• 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.

Is it on a gfci plug? If it is reset that. If not I would recheck the circuit breaker again

It could be a bad in-line circit breaker fuse. Unplug the microwave and take the outside cover off. Look for the in-line circuit breaker fuse. Use a plastic fuse puller (not your hands or a metal tool as there is still voltage stored in the microwave even when it is unplugged). Look at the fuse and see if it is blown. (The metal wire running length of tube will be broken. If you have one, test with an Ohmmeter.