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Re: Sharp R1420B Totally dead. Power to unit is ok.
Most of these have internal line fuses inside of the casing. Once you remove the housing that covers the top and sides, follow the wires from the cord and they should lead you to the fuse. They are usually on the front rh side looking at it from the front. Be careful, even though unplugged, this unit still stores alot of electriacal energy in the capacitor.
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Could be a shorted inverter blew fuse and unit dead. Or bad fuse holder got fuse hot and melted fuse so now unit dead. Must check fuse first and if bad replace and try, if it blows as soon as it tries to heat probably bad inverter. If it works for a long while then quits maybe bad fuse holder not grabbing fuse tightly making it over heat. So then bad by temperature not amperage.
someone needs to follow the voltage into the unit--- The voltage goes to fuse and then to inverter that drives the unit---fyi if unit is not real expensive a repair may not be practical----use some precautions if not familiar with this kind of appliance.
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.
it maybe the internal fuse tht has blown all microwaves have a monitor fuse inside some where the mains power comes in and some on the control pcb it does mean that a short circuit has accured but it can happen if the door is slammed you will need to remove the top cover of the unit to find the fuse and be very careful inside everything is very sharp and door make sure it is unpluged also inside a microwave i a large capacitor this can store power even with the unit off it should be grounded b4 working on the unit but a long as you are just changing the fuse you should ok do if you can use insulated pliers for your own safety,if u fit a new fuse and it blows again thn my advise would be to take it to a a repair shop as the high voltage side of your microwave is up to 4000-5000 volts
Usually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven. When it blows, you need to have a qualified appliance repair technician replace it.
The reason for this is that if you do not have any experience and training with microwaves, you can get a SEVERE shock, even if the oven is unplugged. THAT being said, if you still want to know where the fuse is get back to me. good luck.
ALSO, as you may know, a small microwave these days is under fifty bucks at walmart.
Does the digital display light up at all? Is it completely dead? Are you sure it has power? Have you tried another outlet? If the outlet is good and the unit is completely dead, the internal fuse may have blown. You can try to take the cover off (with the unit unplugged) and look for a blown fuse. Try replacing the fuse with an EXACT fuse of the same rating. Try plugging the unit back in again and see if the unit comes back on. If not, you may have a power supply issue or defective Magnetron.
Please let me know what you find and we'll go from there.