It’s every MacBook owner’s nightmare: you press the power button only to find your MacBook won’t boot up. While the stuff of nightmares, It’s important to know what to do if your MacBook won’t boot up. We look at some basic troubleshooting that can help restore your MacBook when it won’t boot up.
What to Do if Your MacBook Won’t Boot Up
Whether it’s an older MacBook or a cutting edge Unibody MacBook Pro, Apple recommends the same troubleshooting steps for all Mac owners. For this article we are intentions to troubleshoot an Apple laptop, the meaning completely dead, it seems that there is no video output on the screen and the power button seems to have no effect.
1. If the battery is connected and the MagSafe adapter on? This question may become superfluous, but double-checking that everything is connected properly and in order (including the socket you plugged in) is the first step in this process. You can confirm that the MagSafe power supply adapter to your MacBook or MacBook Pro by a green or red light. If the LED does not light, try a different outlet or unplug the MagSafe adapter for a minute and plug it again should turn on the light.
2. When you restart your MacBook or MacBook Pro or not, you should be sure all USB devices and other peripherals. If you have recently all user-replaceable parts such as RAM or hard disk, you should check that the newer components are installed and fully functioning. You can do this quickly, they swap out the old parts. If the MacBook or MacBook Pro boot with the old parts, but not the new, then the new parts may not be defective or incompatible.
3. The third option is the PRAM (Parameter Random Access Memory) and NVRAM (Non Volatile Random Access Memory) is reset. These two types of RAM are comparable to a PC-CMOS, which means that you lose some very basic system settings – do not worry, your files will be safe. Replace the PRAM and NVRAM by pressing the power button and immediately hold down Command-Option-PR. You hear the startup chime a second identical Gong persecuted. More detailed instructions on how to reset the PRAM and NVRAM are available on the Apple Web site.
4. If resetting the PRAM and NVRAM did not bring your MacBook or MacBook Pro back to life, there is still one last thing before starting to try out Apple: resetting the SMC (System Management Controller). To do this, remove the battery from your Mac (if removable) and unplug the MagSafe adapter. Finally, press and hold the power button for five seconds or the power button and left shift key for 5 seconds on the MacBook Air Connect the MagSafe adapter and insert the battery and press the power button. You should be greeted by the familiar Apple chime. A more detailed manual is also available on the Apple site.
Contacting Apple Care
If none of these four troubleshooting attempts have succeeded then it’s time to hand off the Mac to Apple. If you’re covered by Apple Care simply contact the Apple Care and explain that your MacBook or MacBook Pro won’t boot up and what you’ve done to troubleshoot the problem.
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