Hi, I have a last gen Macbook Pro, and when I *sometimes* unplug the power adapter, it can cause my screen to go dark. In comparison, it's similar to when the brightness level is ALL the way down, i.e. you can still make out the screen, but you have to look very, very hard. Of course turning up the brightness does nothing. The fastest way I have found to fix this is to close the lid so that it goes to sleep and then wake it up again and the brightness will be back to normal. Anyone know what causes this and how to fix it? Thanks.