I turned on my macbook the other day and I got the usual white/grey screen but then before the apple logo appeared the screen turned off. I managed to get it working several times since by hooking it up to my external monitor and messing around with detect displays and removing the mini-DVI cable. So I could use my laptop as a laptop. But now the Macbook's monitor won't turn on, it's as if the computer is in clamshell mode. Upon boot the screen may or may not light and if it does it's on for just a second. Then darkness. It's not the brightness, the screen isn't on. I can plug in my external monitor and coax that into working and sometimes when I disconnect it and open and close the macbook the screen'll come on for a second! but then it's off again. It'll come back on, again briefly, if I have my external monitor on mirror mode and adjust the brightness there, but otherwise it's a no-go. I'm thinking something's dead or close to it. I hope you helpful lot here can tell me otherwise. Don't have applecare or anything either so, whoop-di-doo if it is broken! EDIT: I'm using the computer right now to type this with my external monitor, so it is functioning other than the screen.