I once called Sonic on a weekend because my modem kept rebooting. They answered immediately, and the debugging felt like magic.

"My modem keeps rebooting."

"Put the modem to your ear. Is it hissing?"

"Um...? Yes. Yes, it's hissing."

"Bad capacitors. We'll send you a new one."

This was during the Capacitor Plague https://en.wikipedia.org/wiki/Capacitor_plague , so clearly he'd seen this before. Still, fastest support resolution I've ever experienced.