macbook pro turns on but screen stays black — my solution
The Apple Macbook Pro would turn on, but the screen would not. The screen would stay black. I could tell the computer was on because when I hit the “caps lock” key, the green light on the key would turn on and off.
I fixed this the following way (this is basically resetting the Power Management Unit — PMU):
I disconnected the computer from the power cord, and from all other cables.
I held down the power button for several seconds to turn off the computer.
I let it sit 5 minutes.
I restarted the laptop while holding down the Shift key. This restarted the computer in Safe Mode, with the screen visible again.
After I logged in (in Safe Mode) to make sure everything was ok, I simply restarted the computer the normal way, and the screen behaved normally again.
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If that doesn’t work for you, you could try these steps, documented at apple.com:
Holding down Command, Option, P, and R to reset your PRAM and NVRAM
Resetting PowerBook and iBook Power Management Unit (PMU)
weird…i had this same problem, fixed exactly the same way today. I noticed that this is only a week after you…Perhaps an issue with a recent update?
I don’t know, Mark. But I’ve had to do this twice in the last 10 days. -Colin
oh my goodness, oh my goodness, oh my goodness, thank you so so much!
The shift-key starting up was scary, it took ten minutes to boot up, and when I restarted it, it didn’t work, so I re-did it and did a PARAM reset, and now it looks okay, it restarted on its own without black-screening me.
Thank you!!!!!
Colin, thank you… much appreciated.