Everything appeared to be functional. Put cup of water in microwave started it, there was a loud hum similar to the sound the microwave makes when the magnetron activates, the interior light got very dim and then went dead, 20 amp interior fuse blew again.
SOURCE: Microwave keeps blowing fuse
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.
Here are some links with info on part testing:
http://www.microtechfactoryservice.com/cap_test.html
http://www.microtechfactoryservice.com/diode.html
http://www.microtechfactoryservice.com/mag_test.html
http://www.microtechfactoryservice.com/xformer.html
You can usually find helpful exploded view diagrams and order parts by
entering your full model number here: http://tinyurl.com/gv383
Please write back with your brand and model number if you need further help.
We\'re happy to help and we appreciate your thoughtful rating of our answer.
SOURCE: Makes a loud humming sound and blows fuse behind controll panel
Most likely a shorted capacitor is causing the fuse to blow. Easy and cheap to fix.
Check with www.martinmicrowave.com or call toll free 1-877-894-0035 for parts info
SOURCE: Microwave not heating food and is making loud noise.
You have burned out the magnatron (heating element) which is common on GE microwaves. most service companies will charge about 200-250 to replace it
SOURCE: Microwave interior light
Very easy to replace...at least on my JVM1790. Remove the top vent....the long plastic thing that runs along the top of the MW. Two screws on top of the micro. Behind the charcola filter (if you installed one) is an access area to the bulb. remove one screw and the entire assy comes out. Simply R & R the bulb.
SOURCE: Dead Microwave
Check your plug and change the fuse there also.
You might need to rechange the 20 amp 250v fuse behind the control panel again due to the recent spark.
If none of this works then i'm afraid a certified technician needs to check the power packs and boards
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