This will dump and reset settings for anything power management related, and is long known to resolve problems with things like fans, heat, sleeping problems, and of course, display issues.
The first thing you’ll want to do resolve nearly every power related issue on a Mac is to reset the SMC, or System Management Controller. First, Reset the System Management Controller to Fix the Black Display on Boot Though it’s rare, we figured this would be a good opportunity to share three potential solutions to this problem, and similar issues, should you encounter a dark screen on system start. Case in point one of our readers experience with his MacBook Pro, which out of the blue rebooted to a completely dark screen.
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