FUSE AND WALL SOCKET OK BUT MICROWAVE WILL NOT SWITCH ON

not a DIY fix
try another wall socket
if you have no light or power to the microwave select menu
the power source or an internal fault present
buy a new microwave
lots of warnings not to DI Y
http://www.repairclinic.com/RepairHelp/How-To-Fix-A-Microwave/66---/Microwave-not-working

Inspect the door switches and the wiring in the light bulb circuit. If the problem is a door switch, it will probably be visibly broken, or there will be burn marks on it. It's also possible that the door switch bracket is bent or broken and allows the terminals to short to the oven frame. Check the lamp socket - if it is cracked or burned, it should be replaced.

Also look for signs of arcing or burn marks on the controller board, especially near the relays (usually black plastic boxes about 1" x 1' x 3/4' mounted near the wire terminals or wire harness connector).

As a general note, it is rare for a fuse to fail by itself. If you find a blown fuse, look for a cause before replacing it. This may prevent wasting another fuse.

check to see if the power from the wall socket is there. Plug in a lamp or somthing. If it works, then the microwave burned out an internal fuse, or curcuit board.

Now the clock is blinking not keeping time

The microwave oven internal fuse has blown, unplug unit, remove top case 2 to 6 screws, on right side look for a long rectangular silver capacitor, "carefull high voltage" the ceramic fuse should be next to it, "white body with silver ends" remove and replace with same rating. If the fuse blows again chances are the door switch is defective and must be replaced.

most likely the internal fuse
be soooooooooo carefull in replacing this , the capacitor inside the machine can store a huge charge

1. Turn off all electricity to the microwave and unplug from the wall socket. Move the unit to a well-lit location to better see the appliance.
   
2. Step 2 Usea schematic for the particular model of microwave being worked on tolocate the area containing the fuse to be replaced. Fuses can belocated behind the microwave door or behind a panel either on theinterior wall or an exterior panel. Often the fuse will be behind apanel located under the louver vents on top of the microwave.
   
3. Step 3 Removethe panel according to the manufacturer's instructions. Use a screwdriver to remove screws and set aside for replacement.
   
4. Step 4 Locatethe blown fuse and check with a voltmeter. This step ensures that theproblem with the microwave is indeed a blown fuse and not anotherissue. Check for current between fuse connectors.
   
5. Step 5 Take the blown fuse to a local hardware or store such as Lowe's or Home Depot. Staff can assist in finding the exact replacement fuse for the model being repaired.
   
6. Step 6 Placethe new fuse into the panel in exactly the same fashion as the blownfuse came out. Replace any panel using the removed screws and returnthe unit back to its proper location.
   
7. Step 7 Plugthe microwave into the wall socket and turn on all electricity. Testthe unit by ensuring the clock and all other features function.
   

Every m/wave has an internal fuse but you have to remove the cover to find it.it is larger than an ordinary fuse and is normally white in colour.

Yes there is a fuse in the microwave, please read here
http://www.repairclinic.com/0088_6_1.asp#Level1_1

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/

It would seem there is a bad connection in the fuse holder or in the wall socket or in the microwave itself. Maybe you can narrow it down to the microwave by trying other devices in the wall socket. If it's the microwave, it's time to call for serivce.