macbook pro turns on but screen stays black — my solution

Saturday, June 5, 2010 - 1:26 pm
By Colin

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)

453 Responses to “macbook pro turns on but screen stays black — my solution”

  1. Colin

    Hi Alexander,

    If you have the time, would you be able to explain how you ‘cook the logic board’?

    Thanks!
    Colin

    #170585
  2. Alexander

    Hi Collin, this is the best video I found it to be instructive step by step through. If you follow the exact steps you’ll get it done with no problem.
    https://m.youtube.com/watch?v=RqjeKqWbTg4

    #170589
  3. Katherina

    THANKYOU SO MUCH!!!!!!!!!! Terima kasih banyak! mine worked with the first method! it worked miraculously. God bless you!!

    #170729

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