[zxexz]

Sounds like he’s in need of a new microwave. Not tongue-in-cheek; sounds like there’s something up with the shielding, and if it’s not visible, how will you know if it gets worse?

Edit: I see no reason this wouldn’t work, however?

[jeffbee]

There is not substantial variance from one microwave to the next. They are all made by one outfit, then dressed up in different superficial brands and priced randomly. The emissions of a microwave oven are regulated by the FDA, not the FCC.

[macintux]

That doesn't mean, however, that an aging appliance can't misbehave.