Equipment failure - call the expert!
My friend is in charge of keeping all the machinery running at his manufacturing site. The 'expert' arrived, hooked up the malfunctioning machine to his computer to run diagnostics. The conclusion - it was either the motor or the hydraulic pump. The motor checked out okay which left only the hydraulic pump. Despite ribbing from his coworkers, my friend sat silently next to the machine, head bowed, praying.