MacBook won't turn on, black screen. Why and what to do? Press release. How to fix black screen when Mac wakes from sleep Macbook black screen and cursor

In some cases, Mac users may experience a system crash where a black screen appears when the computer tries to wake up from sleep, or the user opens the lid of the MacBook while the devices are active, as indicated by key illumination or audible warnings. If you have a similar problem, don't panic. Most likely, you can cope with it on your own using the instructions published below.

1. Check your screen brightness and power settings

Before taking any action, make sure the screen brightness is at its maximum level (you can increase the brightness by pressing F2), the Mac is running and connected to a power source (even a laptop, as the battery may have run out). If your Mac uses an external display, make sure it's turned on as well.

2. Turn off and turn on your Mac

Often, shutting down and then restarting your computer will be enough to fix the black screen issue when you wake up from sleep. You can do as follows:

• Press and hold the power button on your Mac until the computer turns off.
• Wait a few seconds and then press and hold the power button until the Mac starts to boot.

3. Reset SMC, NVRAM

If your Mac repeatedly displays a black screen when it wakes up from sleep mode, reset the System Management Controller (SMC) and NVRAM.

Modern MacBook owners can do the following:

• Shut down your Mac;
• Disconnect the power cable;
• Simultaneously press and hold the combination for 12 seconds ⇧Shift + Control + ⌥Option (Alt) + Power Button;
• Release the keys at the same time, plug in the power cord, and turn on your Mac;
• Restart your Mac and after the beep when you turn on the computer for 20 seconds, hold down four keys ⌘Cmd + ⌥Option (Alt) + P + R to reset NVRAM.

In most cases, resetting the SMC and NVRAM will help resolve display and power issues.

4. If the problem still persists, reinstall macOS

If you've reset SMC and NVRAM, increased screen brightness, made sure the computer is turned on and connected to a power source, but your Mac continues to display a black screen when it resumes from sleep, you'll need to reinstall the operating system. can be carried out without formatting hard drives, but it is better to play it safe and make backups.

5. Contact Apple Technical Support

If the above methods do not resolve the black screen issue, please contact Apple. In rare cases, the cause of this situation may lie in the hardware or be related to other unnoticed problems.

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 or drop it on the floor, the problem can most likely be solved without going to a service center.

The first step is to perform an external check to ensure that your monitor and power adapter are working properly. The first applies more to the owners of Mac Mini and all-in-one iMacs. Laptop computers manufactured prior to 2016 use the MagSafe magnetic port for charging. The power cord is equipped with a light indicator.

It should be orange or green when properly connected. The L-shaped magnetic latch can work even if the contacts did not have time to connect. In this case, the power cord is externally connected, but power is not supplied due to a slight tilt. T-shaped latches of the latest generation do not have this disadvantage. Make sure MagSafe is connected correctly.

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

Unplug it on both sides and plug it back in. The adapter can automatically cut off the power supply if there is a power disturbance. To reset a triggered protection, unplug it for one minute. When turned on again, the computer should start charging normally.

Reset NVRAM / PRAM

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

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

1. We hold all the keys until the laptop starts to start, emitting the boot sound again. After the power on has gone well and we are logged in, we need to check for updates. Click on the apple logo located in the left corner in the menu bar. We select the marked item.

1. On the main page, press 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 the latest version of High Sierra.

Resetting the SMC

The SMC is responsible for the power supply functions. These include battery management, response to opening and closing the lid, the operation of some system sensors, and interaction with peripheral devices. In any case, if your Mac doesn't seem to be working properly, force restarting the controller may fix the problem.

For Aimak monoblocks and all Mini versions, it is enough to disconnect the power cord for 15 seconds. Wait at least another five seconds before switching on again. For laptops, which include all versions of Air, Pro and 12-inch Retina, do the following.

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

1. Unplug the power cord. Press the three keys indicated in the screenshot in the left corner simultaneously with the power button and hold for ten seconds. We plug back 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 nearly impossible to upgrade in recent years. In previously released MacBooks, the user could independently replace the memory sticks. The operation is simple in principle, but requires the correct selection of modules. If the laptop starts beeping after the upgrade during the startup process, this indicates a problem with the new memory.

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

Finally

If resetting NVRAM and SMC didn't work for you, then your Mac is in serious trouble. The best solution would be to contact a certified service for professional diagnostics. Keep in mind that your MacBook is backed 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.

Fair, not overpriced or understated. There should be prices on the Service website. Necessarily! without "asterisks", it is clear and detailed, where it is technically possible - the most accurate, final.

If spare parts are available, up to 85% of complex repairs can be completed in 1-2 days. Modular repairs take much less time. The website lists the approximate duration of any repair.

Warranty and liability

Any repairs must be guaranteed. Everything is described on the website and in the documents. The guarantee is self-confidence and respect for you. A 3-6 month warranty is good and sufficient. It is needed to check quality and hidden defects that cannot be detected immediately. You see honest and realistic terms (not 3 years), you can be sure that they will help you.

Half of the success in Apple repair is the quality and reliability of spare parts, so a good service works with suppliers directly, there are always several reliable channels and your own warehouse with proven spare parts of current models so that you do not have to waste extra time.

Free diagnostics

This is very important and has already become a good form for the service center. Diagnostics is the most difficult and important part of the repair, but you shouldn't pay a dime for it, even if you don't repair the device as a result.

Service repair and delivery

A good service values \u200b\u200byour time and therefore offers free shipping. And for the same reason, repairs are carried out only in the workshop of the service center: correctly and according to technology, it can only be done at a prepared place.

Convenient schedule

If the Service works for you, and not for itself, then it is always open! absolutely. The schedule should be convenient so that you can be in time before and after work. Good service works both on weekends and on holidays. We are waiting for you and working on your devices every day: 9:00 - 21:00

The reputation of professionals consists of several points

Age and experience of the company

Reliable and experienced service has been known for a long time.
If a company has been on the market for many years and it has managed to establish itself as an expert, people turn to it, write about it, and recommend it. We know what we are talking about, since 98% of incoming devices in the SC are being restored.
Other service centers trust us and transfer complex cases.

How many masters in directions

If you are always waiting for several engineers for each type of equipment, you can be sure:
1. there will be no queue (or it will be minimal) - your device will be taken over immediately.
2. You are giving Macbook repairs to an expert in the field of Mac repairs. He knows all the secrets of these devices

Technical literacy

If you ask a question, a specialist must answer it as accurately as possible.
So that you have an idea of \u200b\u200bwhat exactly you need.
They will try to solve the problem. In most cases, the description tells you what happened and how to fix the problem.

With the release of OS X Mavericks, we began to frequently encounter system freezes, which we had not previously encountered. Once you turn on your Mac, it boots correctly (first demonstrates , then the wheel is spinning under the apple) and freezes at the stage when the user must be logged in. The screen turns black and it seems to you that the computer simply freezes, or its video card or display does not work. But ... if you move the mouse or touch the touchpad of your Mac, you see a completely normal cursor, which at the same time moves correctly and does not give the impression of a fatal error. Usually, our customers experience these symptoms after trying to install any system updates.

A biased study of the error led to the conclusion that neither a PRAM / NVRAM reset, nor a SMC reset, nor reinstalling the operating system (including deleting the System folder from the root of the disk) does not lead to the desired result. Everything is quite logical: freezing occurs not when accessing the system, and at the stage of accessing the user and, therefore, look for the source of the error outside of OS X. Apple's advice to combat this ailment in most cases boils down to formatting the system disk, installing a clean copy of the operating system and restoring from a Time Machine backup ... But there is a more effective way, similar in effect to magic.

But first, let's make sure you know your username and password. With the second, there should be no questions, but we usually do not enter the login by a hundred times a day and we can be mistaken in it.

• Do you know? Great, skip this part and go straight to the algorithm of actions.
• No? Forgot? The easiest way, without having another Mac, to recognize your "username" is to start the computer in Single user mode:

Perfectly! We have the username, remember the password (if the password is forgotten, we have a publication on how to do it, the second method, enabling the super-user). Let's start restoring the computer's performance:

1. Turn on (or restart) the computer in Safe mode. To do this, when switching on, press and hold the ⇧Shift key.
2. When the "thermometer" of the system load reaches the end and the system boots up, we wait for the appearance of that very ill-fated "cursor on a black background".
3. Enter the first character of your username and press the Enter / ⏎Enter key on your keyboard.
4. Enter your user's password and press Enter / ⏎Enter again.
5. We are waiting for the end of the system configuration and restart the computer in any way you know.

Hooray! Your system is now operational! With great time saving ... We do not quite understand as it works, but it really works. This is evidenced by numerous positive reviews on the Apple Discussion Forum and our own experience confirms this fact. Remains to thank

Many of you have probably heard that Apple's operating system 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 fine day it may just take it out of the blue and not boot.

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 been increasingly faced with a situation where MacBook won't boot after next operating system update (Mac OS Sierra in this particular case) while making three loud squeaksrepeating at regular intervals.

Unfortunately, this can happen to each of us, and there is often no time to contact the service center and, of course, not cheap. Fortunately, there is an easy way to try before taking your Mac somewhere. Judging by the reviews on foreign forums, he helped many to save money on contacting the service, more than once he helped such a "hint" and the author of this article. We will talk about him. So what if your MacBook won't turn on?

Mac boot error manifest

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 symptoms of the patient looks like this:

1. you installed an update for the Mac OS operating system (or the computer installed it itself, if you have auto-update enabled);
2. when you turn on (reboot) your MacBook, instead of the expected operating system boot bar, you saw only a black (well, slightly gray, the side illumination of the monitor still turns on) screen;
3. looking at this "light black" screen, you hear three long beep-beep-beep sounds repeated every 5 seconds.

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

"Three consecutive beeps, repeated with a five-second pause: the main memory has not passed the data integrity check."

Okay, okay, this is a RAM error on our MacBook. But the officials somehow forgot to offer a solution. But we found it, and it turned out to be easy. Of course, it's not a fact that this method will help you 100%, but it's worth a try, because many have it working.

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

Solving the problem - resetting the SMC parameters

So if your MacBook Air, MacBook Pro, iMac, Mac mini, or Mac Pro won't turn on and beeps - this signals an error related to random access memory (RAM), which can most often be resolved by resetting the system management controller (SMC) parameters.

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

If you have a MacBook with a non-removable battery

And these are the majority of modern models, the algorithm of actions for you is as follows:

If you have a MacBook with a removable battery

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

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

That is, one of the stationary computers from Apple, then resetting the system management controller (SMC) parameters is even easier:

Using the method suitable for your Mac, you will most likely see the familiar Mac OS boot window - this means that the problem is solved.

What does a SMC reset affect

If you are not very well versed in computers or are simply faced with such a procedure for the first time, then before doing the steps described above, a completely reasonable question may arise: "Will I lose important data or settings on my MacBook as a result of a reset, 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:

• reaction to pressing the power button;
• reaction to opening and closing the display lid on Mac notebooks;
• battery resource management;
• temperature control;
• sudden movement sensor;
• ambient light sensor;
• keyboard backlight;
• status indicator control;
• battery status indicators;
• select an external (instead of internal) video source for individual iMac displays.

Alternative option - swap RAM

If the above option didn't help and your MacBook still won't start, then you should try an alternative method. However, it is not suitable for any Mac computer, but only for those whose RAM can be replaced, and not soldered to the 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 RAM slot. The algorithm of actions is very simple:

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