Step – 2 – Ensure your machine has cooled down without the charger plugged in However each machine has its own quirks, but this startup process works the same way on all of them. Note that in my case, once my machine starts, it doesn’t shut down, even if it heats up, so I am able to finish my tasks.
Step 1- always shutdown your machine after you’re done using it and unplug it from the charger to allow it cool down completely before your next restart. I tested this for a week and have got consistent results (100%). I did this for a week and the machine rebooted with much more consistency than the first experiment which lead me to the next stage.Įxperiment- 3 – Having ruled a few issues through simple observation in the first 2 experiments, I added one more step in the mix and created a sequence. I wanted a 100% solution, which lead me to the next experimentĮxperiment – 2 – I unplugged my laptop from the charger once I was done with my work and left it to cool over night. This had a good result in terms of performance, however the blank screen issue still persisted during the reboot sequence – (though a less than in a normal room with the machine always plugged into the charger). 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.
HOW TO TURN ON MACBOOK AIR WHEN SCREEN IS BLACK PRO
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.