Hopefully I'm not hijacking this thread since my query is similar. The screen on my MBP appears to have gone out. Apple store told me to back it up then bring it in to be shipped off for either LCD replacement or graphic card replacement. When I came home to back it up via firewire to friend's mac, the screen came on. Hoping it would work, I came home to do a time machine backup, and no more screen. I have an external monitor to connect to it and have done so, but the laptop keeps booting and the connected monitor remains black. Can I force it entirely onto the other screen somehow? I'm desperate for a way to backup before handing over my computer at the risk they'll wipe it.