Burning smell when using convection oven mode

Microwave Repair
1

Started noticing a burning smell about 30 days ago thought it was food stuck in unit. Just blew a fuse and now doesn’t work.

We also noticed biscuits that normally took 14 minutes, were browning in only 8. We had to flip them now to prevent burning and still cooking in middle all the way.

We also noticed kitchen lights would dim as microwave was running.

I looked for burnt wiring but only saw a brown spot on cover above fuse.

Please ask any questions that might help.

2

The burning smell has been linked to the fuse. I removed it and could smell the burnt smell. I went to another room and could still smell the burnt smell holding the fuse. I replaced the fuse about 2 months ago with no smell, it just went out.