However it struck me that if this is truly a heat issue than I needed to try a simple experiment…Įxperiment – 1 – Run the machine in an air conditioned room constantly. While trying all these reset sequences I had a charger plugged in which would keep temperature constant at certain level, hence I would have to wait for a few hours before I could restart the machine and try my luck. Even if the screen does come on miraculously after 100’s of SMC resets PRam resets, I realised that machine would usually come on only after it has cooled down to a certain temperature. This is a common problem if you’re using an old MBPRO in 2020 where even google chrome is a heavy program for the hardware. My MacBook Pro 2011 17” has been giving me the same trouble – machine boots however the screen remains blank.Īfter much R&D, trial and error, here’s a logical Fix I have discovered for myself with my laptopġ- One of the main reasons the screen may not be coming on is because the machine may be over heating. Resetting PowerBook and iBook Power Management Unit (PMU) ![]() Holding down Command, Option, P, and R to reset your PRAM and NVRAM If that doesn’t work for you, you could try these steps, documented at : This restarted the computer in Safe Mode, with the screen visible again.Īfter 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. I restarted the laptop while holding down the Shift key. I held down the power button for several seconds to turn off the computer. I disconnected the computer from the power cord, and from all other cables. I fixed this the following way (this is basically resetting the Power Management Unit - PMU): ![]() 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. The Apple Macbook Pro would turn on, but the screen would not.
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