On Tuesday, 8 January 2019 15:30:58 UTC, Harry Bloomfield wrote:
tabbypurr formulated on Tuesday :

Nearly all microwaves use the exact same HV circuit.
The diode is the most failure prone part of it, cheap & easy to replace. But
the OP doesn't really want assistance as they've not provided the symptoms.

Actually, he has. He said something like 'no response from display, no
timer running'.

you're right. Then the most likely culprit is the power fuse. Which if blown requires a check on the shorting resistor & interlock system. For an electronic controller there may also be a fuse or fusible resistor on the PCB, or a blown dropper cap.


NT