To turn on your Macbook you just have to do the following things. The first thing is to plug in the charger and after that press the power button for at least 10 seconds. This will force your MacBook to turn on. If it doesn’t turn on, press the power button for at least 20 seconds. If still, you are seeing a black screen you need to seek Apple assistance. They will help you if something’s not working and needs to be changed. You can also visit this site for help ptcl speed test

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