December 5th, 2010, 01:47 PM
Display Dead, No Power After Start
My microwave died mid-cycle (after about 30 seconds of heating a drink). No strange noises, just cut out and the display panel was blank and non-responsive.
I took off the panel to see if something was fried back there. I saw a ceramic fuse so I thought I'd give that a shot. Replaced it with another 250V 20A fuse and the display came right back on good as new after plugging it back in. Reset the time, went through most of the non-cooking functions (set the clock, turned on the surface light, timer, etc.) and they all seemed to work fine. Thought the problem was fixed.
However, when I attempted to use it to heat something this morning, it allowed me to enter the time without a problem but died about one to two seconds after hitting the "Start" button. Display panel dead again.
So I'm assuming the blown fuse was not the problem but the machine's resolution (or at least safety) for the problem. Anyone know what the actual problem causing these fuses to blow might be?
December 5th, 2010, 06:13 PM
you have a short most likely in the high voltage sector (transformer. Capacitor, Magnatron or diode). Most common are shorted capacitors and diodes. Search past posts , this problem has been addressed many times in here
December 5th, 2010, 08:32 PM
Shorted capacitor is more likely since that will blow the fuse, a shorted diode normally will not.
Microwave parts how to test capacitors, switches, magnetrons high voltage diodes
Testing a capacitor
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