“Did the usual stuff we all know, unplug for so many seconds and and plug back in, to save time you tell them this, but because they are reading from a screen, they insist you do it again.”
In fairness to brave techiebods of any nationality - my partner and I get phoned up with all tech queries for our respective families, and if we had a fiver for every time we've had to trick someone who is insisting "of course it's properly plugged in!" to remove all the cables, put them all back, oh look it works again... we would be able to pay for our wedding already.