Mac Air won't turn on. MacBook won't turn on: possible causes and solutions to the problem. Malfunctions caused by the battery, charging or peripheral device

Apple computers are highly reliable, but their owners sometimes run into trouble. Let's figure out what needs to be done when the MacBook does not turn on. If you didn’t manage to flood your laptop and didn’t drop it on the floor, the problem can most likely be solved without going to a service center.

First, you should perform an external test to ensure that the monitor and power adapter are working properly. The first applies more to owners of Mac Mini and iMac all-in-one PCs. Laptops manufactured before 2016 use a MagSafe magnetic port for charging. Its power cord is equipped with an indicator light.

When connected correctly, it should glow orange or green. The L-shaped magnetic latch can operate even if the contacts have not yet connected. In this case, the power cord is externally connected, but due to slight misalignment, power is not supplied. The latest generation of T-latches do not have this drawback. Make sure MagSafe is connected correctly.

All 12-inch models, and after 2016 – the MacBook Pro, use a power supply with a USB-C connector, which does not have a light indication. MagSafe remains only in Air. The cord of the new adapters has two identical connectors at the ends and connects to the laptop and power supply through a port.

Unplug it on both sides and plug it back in. The adapter can automatically interrupt the power supply if there is a disturbance in the electrical network. To reset the triggered protection, unplug it from the socket for one minute. Once turned back on, the computer should begin charging normally.

Reset NVRAM/PRAM

When the adapter is working properly, power is supplied and the apple on the lid lights up, but the screen is still black, you will need to reset the NVRAM/PRAM.

1. Completely turn off the computer using the power button. Turn it on and immediately press the combination shown in the screenshot.

1. We hold down all the keys until the laptop starts up, making sound signal download again. After the startup went smoothly and we are logged in, we need to check for updates. Click on the apple logo in the menu bar located in the left corner. Select the marked item.

1. On home page Click the indicated button to open the App Store.

The system will automatically check for updates. We install all available ones and, if necessary, update the OS to latest version High Sierra.

Resetting the SMC

The SMC controller is responsible for the power supply functions. These include battery management, response to closing and opening the lid, the operation of some system sensors and interaction with peripheral devices. In any case, if you feel like your Mac isn't working properly, forcefully restarting the controller may resolve the issues.

For Aimak monoblocks and all Mini versions, it is enough to disconnect the power cord for 15 seconds. You must wait at least five more seconds before turning it back on. For laptop computers, which include all versions of Air, Pro and 12-inch Retina, we perform the following steps.

1. Turn off the device completely using the menu item shown.

1. Disconnect the power cord. Press the three keys shown in the screenshot in the left corner simultaneously with the power button and hold for ten seconds. Reconnect the power adapter and turn on the laptop.

As in the previous case, we check and install available OS updates.

Consequences of the upgrade

Apple has made it almost impossible to upgrade in recent years. In previously released MacBooks, the user could independently replace the memory sticks. The operation is, in principle, simple, but requires the correct selection of modules. If, after an upgrade, the laptop starts beeping while turning it on, this indicates problems with the new memory.

In this case, signals are given with a pause of five seconds. Depending on the model, this may be one repeating beep or a series of three consecutive beeps. The only way out of this situation is to reinstall old modules or purchase suitable ones.

Finally

If resetting the NVRAM and SMC didn't help you, then your Mac has serious problems. The best solution You will need to contact a certified service for professional diagnostics. Don't forget that your MacBook is covered by Apple's limited warranty for one year from activation and some repairs are free.

Video instruction

In the video below you can see firsthand how the described operations are performed by a professional.

Many of you have probably heard that operating system from Apple is famous for its reliability and low number of errors and failures that occur during operation. However, Mac OS, unfortunately, is not perfect and one day it may simply not boot for no reason at all.

Without a doubt, this behavior of your Mac can be caused by a number of different errors, which need to be eliminated in different ways, but the author of this article has recently increasingly encountered a situation where MacBook won't boot after operating system update(Mac OS Sierra in this particular case) and makes three loud squeaks, repeated with a certain frequency.

Unfortunately, this can happen to any of us, and contacting a service center is often not timely and, of course, not cheap. Luckily, there's an easy method worth trying before you take your Mac anywhere. Judging by the reviews on foreign forums, it helped many people save money on using the service, and such a “hint” has helped the author of this article more than once. About him and we'll talk. So, what to do if your MacBook won't turn on?

Error appearing when booting Mac

As mentioned above, a computer can behave in a similar way due to a number of different errors (at least 4, judging by the help on the Apple website).

However, in our case, the sequence of actions and the patient’s symptoms look like this:

1. you installed the operating system update Mac systems OS (or the computer installed it itself if you have auto-update enabled);
2. when you turned on (rebooted) your MacBook, instead of the expected operating system loading bar, you saw only a black (well, slightly gray, the side backlight of the monitor still turns on) screen;
3. Looking at this “light black” screen, you heard three long sounds like “beep-beep-beep”, repeated at intervals of 5 seconds.

Having carefully studied the official Apple website, we find the symptoms and description of our error:

"Three consecutive beeps, repeated with a five-second pause: RAM has failed the data integrity check."

Okay, I see, it's a RAM error on our MacBook. But the officials somehow forgot to offer any solution. But we found it, and it turned out to be as simple as shelling pears. Of course, it’s not a fact that this method will help you 100%, but it’s worth a try, because... for many it is works.

By the way, judging by discussions on foreign forums, the following MacBook models most often produce this error and do not turn on: MacBook Air a1466, MacBook Pro a1278 and a1260. It is from the first that we are writing this article.

Solving the problem - resetting SMC parameters

So if your MacBook Air, MacBook Pro, iMac, Mac mini or Mac Pro won't turn on and beeps- This indicates a random access memory (RAM) error, which can most often be resolved by resetting the System Management Controller (SMC).

Depending on what device you have, follow one of the algorithms below.

If you have a MacBook with a non-removable battery

And most modern models are like this, then the algorithm of actions for you is as follows:

If you have a MacBook with a removable battery

Although, in my opinion, these have not been produced for a long time, but just in case, we proceed as follows:

If you have an iMac, Mac mini, or Mac Pro

That is, one of desktop computers from Apple, then resetting the System Management Controller (SMC) settings is even easier:

Using the method appropriate for your Mac, you will most likely see the usual Mac OS loading window - this means that the problem is solved.

What does resetting SMC affect?

If you are not very knowledgeable about computers or are simply encountering such a procedure for the first time, then before performing the steps described above, a completely reasonable question may arise: “Will I lose important data or settings on my MacBook as a result of resetting, because this procedure is somewhat similar to "hard reset" on some gadgets?"

We hasten to reassure you - no, you will not lose anything important. If you are really interested, then take a look at the list of functions for which the system management controller (SMC) is responsible, the parameters of which we reset:

• response to pressing the power button;
• response to opening and closing the display lid on Mac laptops;
• battery resource management;
• temperature control;
• sudden motion sensor;
• ambient light sensor;
• keyboard backlight;
• status indicator control;
• battery status indicators;
• Select an external (rather than internal) video source for select iMac displays.

Alternative option - rearrange the RAM

If the above option didn’t help and your MacBook still won’t start, then it’s worth a try alternative way. However, it is not suitable for everyone Mac computer, but only for those whose RAM can be replaced, and not soldered to motherboard(as is done in most modern Mac models).

If you have one of these computers, then this option may well help you, you just need to know how to get to the slot random access memory. The algorithm of actions is very simple:

That's all. Now you know what you can try first if your Mac won’t start and beeps with a nasty signal. We hope that one of the options suggested above will help you solve this problem and save a significant amount of money on contacting a service center.

What to do if your MacBook refuses to turn on?

Each manufacturer tries to make their device as modern, convenient and compact as possible. But unfortunately, it is very difficult to avoid breakdowns and defects. Apple technology was no exception. The Apple company from Cupertino has created an ultra-thin and powerful laptop. And according to tradition, Apple decided to call its new product an original name. The MacBook is a reliable computer, but unfortunately it can break down. A laptop can break down, both technically and software-wise. We will look at various options for breakdowns and consider various ways way out of a difficult situation.

Instructions for restoring the operation of a MacBook

So let's look at the following diagram:

1. Let's say your laptop won't turn on. First of all, turn off everything additional devices connected to MacBook.
2. Of course, the MacBook must be turned off. First, unplug the compact power cord from the computer and from the network. You need to wait about a minute. Now we connect an ordinary device first to the network, and then to the MacBook itself. The indicator should light green or yellow after connection.
3. If everything is in order with the network adapter and the cable itself, the indicator will light up. If there are any problems with the power supply, the adapter will not light up. In this case, the laptop does not turn on due to faulty parts. You need to contact an Apple service center.
4. So, if there are no problems with the network, and the equipment has started, but the main boot stage does not complete, then reset P RAM. This is done by simultaneously pressing the “Option”, “Command”, “R”, “P” keys and hold them until you hear the desired signal.
5. Now you need to reset the power management settings. This is done as follows: first we connect the power adapter to a working power source. Now press the key combination “Option + Control + Shift” and at the same time press the MacBook’s power button. Count down 5 seconds, and then press the power key again. After this, the MacBook should turn on while the boot process is in progress, check the sleep mode indicator - if it is blinking, then the boot cycle is complete.

These steps should help you get the settings started to enable. If these operations do not help turn on the MacBook, then only the service center remains. If you managed to turn on your MacBook, then your computer has crashed. Perhaps this happened due to a sudden voltage drop, a sudden shutdown of the laptop in a hurry, or some kind of software glitch, etc. We also have an article describing what to do if you can't turn off your MacBook.

Apple equipment is famous not only for its trendy design, but also for its build quality. But like any electronics, it can fail. And if fixing some breakdowns is the work of a specialist, then minor problems can be solved on your own. So, what to do if your Macbook won’t turn on?

Determining the cause of the malfunction

First of all, you need to inspect the laptop for visible damage. Special attention is needed pay attention to the power connector and charger— the green indicator on it should be lit when connected to the network. The connector itself, especially when using a “non-native” charger, may become deformed or become loose. If you have an alternative charger, try turning on your Macbook using it.

The main reasons why a Macbook may not turn on is physical damage or a short circuit after liquid contact. Even if your equipment did not fall or fall under water, ask your family or colleagues. Perhaps they thought it would be okay and didn't tell you. In this case, it is better not to try to turn on the Mac again (if possible, remove the battery), but immediately go to a service center.

If there are no visible defects and the Macbook does not turn on after charging, the reason may lie in the controller.

What “symptoms” require you to immediately contact a service center?

• 1. If the Macbook stops turning on after a fall, impact, or sudden closing. In this case, a contact could come loose or a crack could develop along one of the boards. To determine the cause, you will need to conduct a diagnosis.
• 2. If the laptop has been flooded with liquid. Under no circumstances should you turn on the equipment if water, tea, juice or any other liquid has gotten into it - a short circuit may occur. The service center specialists will disassemble the Macbook, dry it, clean it and diagnose it. There may be no need for repairs.
• 3. If the last time you turned it on, you heard a pop or smelled a specific smell. In this case it could happen short circuit on board. The exact cause can only be determined through diagnostics.

What you can try to do yourself

If you are sure that the Macbook did not fall or flood, then you can still try to turn it on.

• 1. Check that the charger is working properly. The indicator (green light) should light up when connected to the network and go out when disconnected.
• 2. Pull out battery(having previously disconnected from the charger) and hold down the Power button for a couple of seconds. Replace the battery, connect the charger, and try turning on your Macbook again.
• 3. If the laptop is hot, wait for it to cool (this may take from half an hour to a couple of hours). After that, try turning on your Macbook again. If the equipment is working, you will need to clean it, for which you should contact the service center.

If none of the tips helped, it is better not to hesitate and turn to specialists. Remember that timely diagnosis and troubleshooting will help avoid more serious breakdowns, data loss and costly repairs. All of the above steps apply to both macbook air, so macbook pro.

Possible malfunctions and cost of solution:

Macsave - professional macbook repair in Moscow.

Topic of the question*~ Daria ~ 01/14/2018

I opened the laptop, the keyboard lit up, and the screen turned on for a split second and is now black, when the charger is connected, there is a taste signal

Macsave Center Answer: Daria, good afternoon!
It's difficult to tell exactly what the problem is remotely. The device needs to be diagnosed. Bring it, we'll see. Diagnostics are free.

Doesn't turn on~ Anna ~ 06-01-2018

Hello! The MacBook Pro does not turn on, the battery is charging (the green light is on), when turned on, only an apple appears on the screen on a gray background and nothing loads, while the laptop heats up.

Macsave Center Answer: Hello, most likely the problem is in the system, reinstallation costs 1500 rubles, come for a free diagnosis!

MacBook Pro won't turn on~ Tatyana ~ 04/16/2017

Hello, after the update the laptop turned off and will not turn on again, what could be the problem?

Macsave Center Answer: Tatyana, good afternoon!
There can be many problems, it’s difficult to say for sure remotely. The device needs to be diagnosed. Bring it, we'll see. Diagnostics are free.

macbook pro~ day ~ 11-03-2017

Good evening, I turn on the computer (the indicator lights up when you turn it on), it seems to work, but the screen is black and the keyboard does not work?

Macsave Center Answer: Dan, good afternoon!
It is difficult to say from a distance exactly what the reason is. The video card may be faulty. Bring it, we'll see. Diagnostics are free.

Macbook pro won't turn on~ Andrey ~ 11/14/2016

When exiting sleep mode, the laptop showed a black screen. I turned it off completely with the power button. And it won't turn on anymore. Charging lights up green. Long pressing the power button did nothing.

Macsave Center Answer: Andrey, good afternoon!
It is necessary to diagnose the device. There may be difficulties in the operation of the battery, power connector or charging.

MacBook hangs ~ Konstantin ~ 10/15/2016

Hello. There is a problem with the MacBook Pro 11 15 inches. After installing Parallel and Windows on the Mac, it rebooted, after which thin red horizontal lines appeared on the screen and the Mac hangs halfway through the load and throws it out onto a gray or white screen and hangs. At this moment the cooler starts to work very hard. Unfortunately, the recovery mode does not work (cmnd+r) and also does not download the version from the Internet to reinstall the system from the Internet. Before operations with Windows, everything worked like clockwork. What could be the problem???

Macsave Center Answer: Konstantin, good afternoon!
It is difficult to say from a distance exactly what the reason is. Bring it in for diagnostics and we'll take a look.

MacBook 12 won't turn on ~ Maxim ~ 09/19/2016

At the stage of entering the password, the Mac froze (possibly due to the fact that the buttons were being wiped at that time), they tried to turn it off by pressing the power button (most likely they simply put it into sleep mode). When trying to turn it on it does not respond. But the touchpad is active (it makes clicks). help me please

Macsave Center Answer: Maxim, good afternoon!
It is necessary to diagnose the device. The keyboard may be faulty, or perhaps the video chip. Bring it, let's see.

The screen does not turn on after hibernation. ~ Alexey ~ 06-08-2016

Good afternoon Since yesterday, the iMac 27 5k does not turn on the screen after entering sleep mode, i.e. remains black, although it makes sounds when pressing keys. After a forced switch off and on using the buttons, everything works fine until it goes into sleep mode again. The day before yesterday was another iOS update. What can be wrong? Thank you.

Macsave Center Answer: Good afternoon, the software is probably crooked

Charger ~ Vladislav ~ 07/24/2016

Good afternoon. The MacBook was on its original charger (but the wire was broken) and when the laptop started moving, a short circuit occurred and the laptop turned off. BUT it turned on and works. Why did this happen and is it worth getting it checked? Thank you.

Macsave Center Answer: Hello Vladislav, If this doesn’t happen again, then it’s not worth it.

Sincerely,

Manager Vasily

The Mac turned off and won't turn on. ~ Anton ~ 04/28/2016

Good afternoon. I'll describe the problem so the poppy just got knocked out. The charger indicator blinks faintly. the technician to whom I gave the laptop said that there was a possible problem in charger. I would like to get advice from you.

Macsave Center Answer: Good afternoon, I need to diagnose, I think the problem is in the power circuits

The MacBook boots every time~ Alex ~ 03/19/2016

Hello!
After the fall, the MacBook began to freeze, for example, when trying to download a streaming video (but this does not always happen, but only when the Mac is very hot). If you try to load it (it doesn’t matter whether it’s warmed up or cooled down), then it loads every fifth time: the apple lights up, it’s loading, and then at some point just a white screen appears, and after a few seconds the Mac turns off.

Macsave Center Answer: Good afternoon, such malfunctions are associated with the video chip and it needs to be changed, but first we diagnose

Hello, please tell me: the Mac Book unexpectedly turned off when connecting an iPhone to it via a wire. After that it won't turn on. The charging indicators do not light up (no indicators light up at all). Magsafe flickers faintly orange when connected to the network and to a laptop. What could it be? Thank you in advance

Macsave Center Answer: Good afternoon, perhaps the problem is in the microcontroller, it could burn out due to jumps or static via USB, it could also be a problem in the power circuits. We need to do a diagnosis.

Macbook won't turn on ~ Tatyana ~ 06/23/2015

Good evening! Please tell me, the MacBook lay unused for 2 years, after which attempts to turn it on were unsuccessful. What could it be connected with? could the battery be completely covered? Thank you!!!

Macsave Center Answer: Good afternoon, often the battery is over-discharged and fails, but it can also be anything, you need to diagnose it, diagnosis is free.

MacBook screen has streaks when loading ~ Anastasia ~ 01/22/2015

Hello, after turning on, an apple and a strip appear on the display (as with updates), after 30 seconds the strip disappears before loading and the laptop turns off, help!

Macsave Center Answer: Good afternoon, your video card has failed, the cost of replacement is 9000 rubles

macbook.appel~ Marina ~ 02-11-2014

Including the screen lights up after a minute, a folder with a question mark appears in the middle, but the macbook itself does not turn on. Help me find out the reason

Macsave Center Answer: Good evening, there may be several problems with the lack of loading, it may be a loop hard drive out of order, alone HDD or perhaps the Mac OS X operating system has crashed. You need to do diagnostics, perhaps in front of you.

If your Macbook won't turn on, there's no reason to worry. According to Macrepublic service center specialists, every second Apple laptop, which suddenly turned off and does not want to turn on, can be easily reanimated at home.

Our advantages

Let's take a closer look at how this happens.

Check monitor

First of all, you need to rule out a display malfunction. Perhaps the Macbook Pro screen does not turn on, but the rest of the system devices are working properly. If during startup you hear the noise of the fan, the display works and the melody of loading the OS is heard, but the screen remains black, it means there is something wrong with it. The problem can only be fixed at a service center.

Check power

Most common cause The fact that Pro, Air, Retina, Macbook does not turn on is the lack of power. Therefore, if such problems arise, perform the following actions:

Check the connections between the power cord and the adapter and outlet.

Make sure the outlet is working.

Recheck the cord and adapter on other devices.

Check the integrity of the charging plug. Clean it from dust and debris.

Eliminate the possibility of battery failure

Other ways to turn on Macbook

A malfunctioning controller or memory modules can also cause your Macbook to not turn on. Rebooting and completely turning off the power for 10 seconds will help resolve the failure.

If Pro, Air, Retina, Macbook does not turn on, you can try resetting the system management controller parameters. The reset is performed by synchronously pressing the “Option”, “Control”, “Shift” and “Power” keys. In this case, the power cord must be connected to the laptop, and the buttons must be released simultaneously. After that, you can try to turn on the MacBook again.

Another way to proceed if the Macbook Pro screen does not turn on is to restart the PRAM/NVRAM. Restarting is done by pressing and holding the Power, Option, R and P buttons until the black screen turns gray and the reboot occurs.

A power surge or power failure can also cause your MacBook not to turn on. Power control is carried out by “Power Manager”, which blocks the laptop from turning on. The following actions will help you disable the manager's action: When the MacBook overheats, a shutdown is also observed. You can turn on the device only after it has completely cooled down.

• disconnect the gadget from the network;
• remove the battery;
• press the “Power” key and hold for 5-10 seconds;
• insert the battery back;
• try turning on the laptop again.

1. When the MacBook overheats, a shutdown is also observed. You can turn on the device only after it has completely cooled down.

   If Pro, Air, Retina, Macbook does not turn on after updating, download in safe mode, holding down the “Shift” button during startup.