Ne9970, clockworks, set timer for micro hit start and the fuse blows, already changed megatron

SOURCE: microwave blowing fuses when setting programme

suspect high tension diode or bleed diode faulty. easy to replace but!!!!!!!!!!!!!!!!!!

BE CAREFUL. THERE ARE VERY HIGH VOLTAGES PRESENT IN A MICROWAVE. YOU MUST SHORT CIRCUIT THE CAPACITOR WITH A GOOD QUALITY SCREWDRIVER IE GOOD INSULATION. VOLTAGE CAN BE UP TO 1500 VOLTS AND IT CAN KILL.

IF YOU ARE NOT SURE WHAT TO DO, GET SOMEBODY IN

SOURCE: fuse

The Interlock Monitor Switch is an added
safety check on the Primary and
Secondary Interlock Switches. If the
Primary and Secondary Interlock Switches
allow the oven to operate with the door
open, the Monitor Switch will blow the
fuse.

You can get more information about adjuting the interlock switch from this link

http://136.166.4.200/contents/Microwave/LMVM1935xx/LMVM1935xx_Service_Manual.pdf

sections 7-11 thru 7-12 discuss the door interlock adjustment that will cause the 20A fuse to blow if it isn't set up right. I hope this helps you...

SOURCE: help used micro as timer but pushed start instead now wont work

Unplug it and try it again, may just need power on off reset

SOURCE: the knob on my profile

Yes that is the smart card that has failed inside the unit... it sounds like you are very handy for sure... hopefully you purchased the megatron from someone that will let you return it (assuming you have the original one still) and can purchase the smart card...

Thanks
Tim