Hi,
I am pretty sure this is not a new problem. I hope that somebody has seen it before and hopefully they have some recommendations. What can I try next?
The problem:
In order to start my MacBookPro Retina( 11,3 - Late 2013 ) I need to keep the power button until the chime sound is...
When working on my MacBook Air 11 early 2015 it sometimes goes into sleeping mode. But, black screen, no reaction when tapping keys. Only lifting and lowering the display (often several times in a row) can wake it up again.
What to do ? When in the shop the problem did not reproduce of course ...