I have a Lenovo ThinkPad L420. I accidentally pressed Fn and F12 together and apparently that's hibernation mode. When I turn my laptop back on, it gets to the Control Alt Delete Screen and immediately the screen goes black, and in a few seconds the laptop turns back off. It is charged.
Pressed Fn + F12 on ThinkPad, when I turn it on it turns off?
Guest
Fn + F12
Put the computer into hibernation mode. To return to normal operation, press the power button for less than four seconds.
http://support.lenovo.com/...D=HT002061
Timbuk4
It is not working… The computer shuts down automatically
Vamsiraj