Power cycling—turning a device off and on—is a fundamental troubleshooting step used to reset configuration parameters or recover from crashes, and it can be performed manually or remotely through devices like network-connected power distribution units (PDUs). Although it's the first line of defense for frozen computers, frequent power cycling can cause thermal stress, so a simple software reset is often gentler on the hardware. This basic technique has proven critical in space history, famously rescuing the Apollo 14 landing radar just in time to safely touch down on the Moon, and later fixing a glitch that prevented the Rosetta mission's Philae lander from awakening. More recently, it saved a billion-dollar launch when engineers cycled the hydraulic system of the AEHF-6 satellite on 26 March 2020, and NASA used it again in 2023 to remotely reboot the unresponsive Interstellar Boundary Explorer spacecraft. The action is so iconic that it is humorously parodied in the TV show The IT Crowd, where the main technical support character Roy repeatedly recommends turning computers off and on as the solution to every employee issue.