From WarmNuts, Reply #11:
I could imagine the engineers on the radio "is it plugged in??" "have u tried turning it off and on again??"
Modern aircraft use lots of networked computers. Sometimes, if one computer hangs itself up, it is sufficient to cycle this computer's CB to let it reboot. Sometimes though the data bus system goes out of sync. In these cases it helps to power down the complete aircraft, wait for a few minutes and then switch on power again to let all computers reboot at the same time. I had this happen from time to time with B757, B767, B737NG, A300-600, A320 and MD-11 aircraft.
In this regard the whole thing is a complete non-event.