Ahh, computers, switch em off and switch em on again. That's what worries me when I go in one of these new fly by wire planes - "Tower, we are at 30,000 feet and all the computers are playing up, what do we do?" "No problem flight 101 , just close down the whole plane and switch it on again" Click Click "Hallo flight 101 are you there .....Hallo..."
That's what I did last night btw. It came back but some of the readouts had zeroed themselves eg mpg, ave speed.