Just BOOT it up
Back in the late 1970s I serviced an aging mainframe system at a large metro newspaper. The combination device for reading and punching cards as well as printing was an even older device. The technology of the "printer" was based on numerous relays. The printer was having startup problems. I pulled out the box that controlled power, it was completely filled with relays. After cleaning the relay contacts it came back to life. I noticed the box had a large black mark on the outside. While I was attempting to clean the black mark the computer operator remarked to not bother, that was where they would give it a swift kick when it got cranky.
Biting the hand that feeds IT
