Not unlike other computers, Mac can experience a wide range of both software and hardware issues that substantially compromise their usability. Given the susceptibility to certain errors, for the most part reliable and well-built Mac machines, sometimes, won’t turn on. The article details possible approaches to resolving the problem of a Mac that doesn’t turn on.
The most probable causes of the problem fall into two general categories: display issues and power issues.
To rule out a faulty display as a possible cause of the problem, it is necessary to turn on the computer by pressing its power button. To check whether a Mac is turned on if the display is not working, look for the following signs:
- A startup tone on MacBook Air and Mac models released prior to 2016;
- The audible fan noise;
- The Sleep LED is lit during the startup and shutdown, which functions as a visual diagnostic indicator;
- The Caps Lock light comes on after pressing the key;
If a user has an external display that functions properly, the problem lies with the faulty main display. However, if only one display is used and the visual and auditory signs outlined above are absent, it is necessary to check whether the Mac experiences power issues.
If the Mac doesn’t show signs of life, it is recommended to run through these troubleshooting steps:
- Make sure that the power cable is plugged into the wall outlet. To this end, follow it from the Mac to the outlet or surge protector and verify a secure connection. If the Mac doesn’t turn on, plug the cable into another wall outlet.
- In case there is an extra power cord, it is necessary to connect its one end to the computer and plug another one into the wall outlet. Those who use a MacBook, should plug the MagSafe connector and wait several minutes to charge the notebook.
- Disconnect all peripheral devices from the Mac. The examples of such devices are media card readers, USB hubs, smartphones, webcams, and printers among others.
- Check the display’s brightness by using the function keys.
- Press and hold the power button for at least ten seconds. Release the button and press it again to check whether the Mac turns on.
- Reset the System Management Controller (SMC) by pressing the Shift – Control – Option key combination on the keyboard while simultaneously pressing the power button. Hold the keys and the button for at least ten seconds, then release them. Press the power button to see if the computer turns on. MacBook owners can reset SMC by removing the battery and holding the power button for five seconds.
If after following these steps, a user is sure that electricity is delivered to the Mac without interruption, but it still doesn’t work, it is needed to visit the closest Apple Store or Apple Authorized Service Provider for a detailed diagnosis. The majority of hardware and software issues are covered under AppleCare Protection Plan; therefore, the user won’t be charged with any fees.