Power control board might be the problem
SOURCE: Microwave dead after power surge.
A) The fuse you change was the one on top just behind the control board? correct? Not the one on the door hinge side of the microwave. (as is is the Thermal cutout ) Then most likely took out the control board... i would also check the Capacitor and recifier let me know it this helped?
SOURCE: Sharp Microwave Model R-1830: No power
A microwave can be dead for many reasons.
It
may be the fuse, which is usually located behind the grille or 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 oven thermal cutout (TCO) on the top of the oven cavity / body or an open thermal fuse on or above the magnetron.
These should read closed (virtually zero) on a continuity check.
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 went dead or when you plugged it in or opened or closed
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.
You can usually find exploded views and order parts by entering your model number here at the Sears parts site but the best place to order Sharp parts is Tritronics.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
SOURCE: There is no power to the unit at all circuit breaker not tripped
blown fuse-easy fix -find book-it is shown behind service panel
SOURCE: No Power, No LED's. Circuit breaker OK
There is an internal fuse, however to access it the unit must come out. The outer case will need to be removed. The following link will take you to GE's website where you can get installation instructions. The fuse is available at ther parts site, but you can get a new on for less than a dollar at radio Shack. Take the fuse with you.
http://products.geappliances.com/ApplProducts/Dispatcher?REQUEST=SpecPage&Sku=JVM1665DNWW
Testimonial: "Thank you for your quick response the information was very helpful. Installation instructions were not available. How do I remove the appliance?"
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