Ugh. I've been messing with this the better part of the morning. On boot, I get a black screen. Pressing the caps lock key, the light toggles on and off and I also hear the startup sound on boot...so think it's a display issue. This started yesterday when all the sudden the screen went black in the middle of using it. So far I've tried: - Resetting the SMC, multiple times - Resetting the NVRAM, multiple times - Booting into safe mode. I got this to work once, but it took a REALLY long time. They keyboard wasn't lit up, so I didn't think it was doing anything...then all the sudden the login screen popped up after maybe 10-15 minutes. Really hoping I can get this figured out. Losing it for several days to Apple Support would kill productivity. Any ideas? Edit> MB Pro Retina 15", i7, El Capitan. 2012ish I think.