Last night (Thursday January 10th) our Victoria - Sutton 10-car 377 got to West Croydon Platform 4 and the doors would not open. After a 20-25 minute delay and various mutterings over the PA, the whole train was powered down. Everything off except the emergency lighting. Then the various electrical systems were brought back on one at a time. With everything back on, the doors worked again and the train was sent fast to Sutton (leaving out Waddon, Wallington and Carshalton Beeches). I can only imagine the chaos that was occurring behind us, since all the slows out of Victoria would have been stacking, together with anything south of New Cross Gate on the London Bridge slows. Is this 'Microsoft Windows' solution (turn it off and turn it back on again), the standard procedure? Are all the 377 systems so interconnected that it needs a 'reboot' to get the doors open? Or was this just "let's give it a try, we've got nothing to lose" ?