That's why tech support has moved on to "unplug the thing, wait a minute, then plug it back in".

It gives the capacitors to discharge; but more importantly, it gives an excuse to actually force the person to plug the thing in.

I ask people to unplug their Ethernet cable and tell me the colors they see on the wires all the time.

I don't care, of course. But they'll happily do that, where if I ask them to verify if the cable is properly plugged in, 99% of them will just say yes without so much as glancing in the cables' direction.

Earlier in my career the clients system was not powered at all, I did:

"Is it plugged in and switched on?" A: Yes, to a powerboard.

"Is the powerboard plugged in and switched on?" A: Yes.

I did the onsite visit and found the powerboard plugged into itself.

Normally I would facepalm and curse the idiocy but... it was a care respite facility and they had more pressing issues to deal with that I wouldn't want to deal with - their role is heroic I feel.

And an easy win already makes my day so I sorted it, told them it was fixed with a smile, and continued on.