There is a fuse inside that is probably blown. If you replace it and it keeps blowing the fuse when you open and close the door, that means a problem with the door switches sequence. I could run you through that step by step.......
1) see the diagram attached for to see the fuse, you must unplugged the power from the wall, and turn OFF the c.breaker from your house.2) if the problem is the door latch see the video use the common sense.God bless you
buy one of the wind up ones that last time I looked were still available on places like EBAY.It might considering the cost of a new unit be cheaper and better to measure it and replace it?
The fuse can be located on the power supply board. To locate the power
supply board, trace the microwave wire back into the microwave. The area
where the microwave wire is soldered inside the TV is the power supply
board. There is fuse on the board. So this means you have to disassemble
the microwave....
Note that microwave store a lot of current, so unplug it and wait for about 30mins before your attempt disassembling it.
It is time to replace the microwave oven, the problem you are describing is one or more issues, the high voltage transformer, high voltage capacitor, the magnetron, and the high voltage diode all play a key roll in generating the high voltage which translates into heating the food. The cost in my view will run high and would be put to better use buying a new microwave oven.
It sounds like the magnetron may have
either failed or is not being supplied with the extremely high
voltage required to run it.
YOUR
SAFETY IS PARAMOUNT
This is a job for a professional but if
you are safety clued up, here's instruction. Make sure the
!!!!capacitor is discharged!!!!! before attempting any
sort of repair. Check the door interlock switches first then the
high voltage diode with either an AVO model 8 or moving coil meter on
high resistance range for short circuit, (DVM's won't show the
fault!), the capacitor can fail and go short circuit, the feed fuse
on the primary of the high voltage transformer and then finally, the
magnetron is best checked by substitution. Hope that helps.
