Back in the last millennia, I worked for a company who had a server at a customer's site in a London train depot, I was based in Derby
It "stopped working", no power to it at all. Being the lowly trainee at the time I wasn't important to speak to the client myself, but was dispatched on a train to the bright lights to try to resolve the issue, armed with spare PSU and cables.
Arrived on site, lifted the floorbox, and turned the plug back on
Case closed, long lunch on expenses, beers on the train home