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.