Microwave oven just died

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.

Once you've looked over the safety warnings, here are some useful links:

http://www.gallawa.com/microtech/cap_test.html
http://www.gallawa.com/microtech/diode.html
http://www.gallawa.com/microtech/mag_test.html
http://www.gallawa.com/microtech/xformer.html

You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

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