Completely dead; no problem at the house circuit-breaker box

Your oven has a plug or is wired to a 120volt line. Check this. You may need to Reset circuit breaker.

did you check the internal fuse?...You will have to take the back off to get at it.

It is fused through the house fuse/circuit breaker box.

is voltage select switch on back near power cord entry set for proper voltage ? 120 for usa and 240 for Europe and Canada also check light bulbs inside they could have gotten broken to cause a shortage

check control pannel

250v 20a fuse

http://cdn-d.appliancepartspros.com/0029704203_4.gif

Noise Filter Fuse

Check main fuse if completely dead. Replacements available below if blown:

http://www.electronix.com/microwave-repair-c-557.html

Thanks for responding. It is a EWave KOT-152UW. I think EWave is part of Magic Chef. I think it is the door switch. When I opened the microwave, the circuit breaker tripped. I reset the circuit breaker, and it worked for several days, but the last time, the microwave went dead. The reason I want to use the same bracket is it has through the wall (horizontal) venting to the outside, and I am not keen on trying to cut more holes.

A microwave can be dead for many reasons.

It may be the fuse, which is usually located on the floor of the oven behind the control panel or between the door switches.

If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

There may also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

We're happy to help you and we'd appreciate your thoughtful rating of our answer.

Fan turned on after cooking because a thermostat got to hot and tripped turning on the fan to try to cool the unit.  The unit went completely dead when thermal fuse tripped which is located above the cavity on the left side.