hi well I saw a few of you had hibernate on your power off menu so I looked up on google how to do it and used the group user window to add out to my menu. All good so far. Hibernate appears and I try it out. The screen goes black and now I can no longer get my surface to turn on. I've pressed the power button, held it in for ages, tried it plugged into power, nothing just a dead, black tablet any ideas guys on how to save it?