Has this issue of yours been resolved? I bought a MacBook Pro 14" 4 months ago and this black screen issue began. Have given it to Apple, they reinstalled the latest OS and it worked for 2 weeks, but the problem is back. When connected to an external monitor, I can use the Mac (that is how I'm typing this reply), but on its own it's useless. Have tried everything for the last 2 weeks. Does this seem like a hardware issue? Because when Apple kept the system and ran a check for 24 hours, it showed no hardware issue. I'm lost.