> Untick everything under the 'Power Adapter tab' When i kept doing this (back and forth on the brightness) it eventually stayed bright in short time periods so i eventually could navigate my way to the system preferences and this is what I changed: I also found that when i pushed f1 (lower brightness) all the way down and then back up again with f2 my screen would come up as normal for a split second. But after looking a bit closer i realised that the stuff on the screen WAS there but so so so faint. I heard the same start up sound however i saw nothing on the screen. I thought i just needed to reboot it so i held down the power button to shut it down and then restarted it. This has just happened to my computer, one minute i was using it, one minute the screen went black.