MacBook Power Circuit Malfunction This is perhaps the main reason for the "dead" MacBook! If the laptop does not show signs of life, then the system simply does not receive power. A number of factors can serve this: a faulty charger, a problem battery, a burnt power circuit, or a damaged motherboard. You just simply react out the iQuickFixRepair site to resolve your issues within second.
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Press the Shift+Control+Option keys at the left side of the keyboard and the Power button, and hold them all down. Release all four buttons at the same time, and then press the Power button to turn the Mac on.
Mac desktops don’t have batteries, so unplug the Mac’s power cord and leave it unplugged for fifteen seconds. Plug it back in, wait five more seconds, and then press the Power button to turn the Mac back on.
If your Mac is stuck in a frozen state and not responding to power button presses, you can fix it by cutting the power to it and forcing it to restart.
On a modern MacBook without a removable battery, press the Power button and hold it down for ten seconds. If your Mac is running, this will forcibly cut the power to it and force it to restart.