#THREE BEEPS MACBOOK PRO FIX SERIES#

If you can see a green or orange light on the MagSafe connector,В it means both your charger and the SMC in your MacBook are working now. Let your charger top up the battery above the minimum level. However, there are some models of MacBooks that require a minimum battery power before the Mac can turn on. If the flat battery causes your MacBook Air or MacBook Pro not turning on, most Macs will power on automatically if you connect a working charger to it.

If possible, try to use the original power adapter that came with your Mac. Use the correct power adapter for your MacBook model to charge the MacBook for about 5 minutes.

If youвЂ™re not sure about the outlet, test it with a lamp or a mobile phone charger. Check if the power cable is undamaged and securely plugged into your Mac and a working electrical outlet. You need to make sure your MacBook is receiving power from either the MagSafe or USB-C charger. If the SMC has not received power, or failed to function, or failed to create the required вЂњmini power suppliesвЂќ, your MacBook wonвЂ™t turn on.ДЇor deeper technical details of the MacBook power-on process, see our article How does my MacBook power on? These вЂњmini power suppliesвЂќ will power your MacвЂ™s memory, hard drive, CPU, Wifi, keyboard, trackpad and screen. 5V, 3.3V, 1.2V, 1.8V, etc.) in a precisely defined sequence.

#THREE BEEPS MACBOOK PRO FIX SERIES#

Once the SMC detects that you have pressed the power button, the SMC will co-operate with the Intel chipset to create a series of вЂњmini power suppliesвЂќ of different voltages (e.g. The System Management Controller (SMC)В governs the entire MacBook power-on process. Any of these components gone wrong could cause your MacBook wonвЂ™t turn on.ДЇrom the moment you press the power button or Touch ID button, to the MacBook displaying the image on the screen, your MacBook has gone through a series of complicated power-on events. A MacBook consists of the following components: a screen, keyboard, touchpad, battery, SSD drive and a logic board.

Three beeps macbook pro fix