Why is my screen blank?
My MacBook boots to a blank screen—I'm reasonably sure it is not a blank white screen, but actually the color of the apple boot screen prior to the grey logo appearing. However it doesn't stop booting, the screen just remains blank. While the MacBook gives no response to what its doing, it appears on the network (and I am able to log in and transfer files through the network), and I can even plug it into an external monitor and see the desktop. I've managed to set the external as the primary display and am able to fully use the computer, so I am pretty sure it is not a logic board failure (everything else is functioning properly). However, I just replaced the display data cable and the problem persists... what else could the problem be?
I have reset the PRAM and SMC, neither helped. I've also removed the battery and cord and held the power button for a while, which also didn't work.