Macbook pro 15 screen does not turn on. MacBook won't turn on: possible causes and solutions to the problem. Other ways to turn on Macbook

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

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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, when similar problems 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 problem.

    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.

Fair, not overpriced and not underestimated. There should be prices on the Service website. Necessarily! without asterisks, clear and detailed, where technically possible - as accurate and concise as possible.

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

Warranty and responsibility

A guarantee must be given for any repairs. 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 the success in Apple repair is the quality and reliability of spare parts, so a good service works directly with suppliers, there are always several reliable channels and your own warehouse with proven spare parts for current models, so you don’t have to waste extra time.

Free diagnostics

This is very important and has already become a rule of good manners for the service center. Diagnostics is the most difficult and important part of the repair, but you don't have to pay a penny for it, even if you don't repair the device based on its results.

Service repairs and delivery

Good service values ​​your time, so he offers free shipping. And for the same reason, repairs are carried out only in the workshop of a service center: they can be done correctly and according to technology only in 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 to fit in before and after work. Good service works on weekends and 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

Company age and experience

Reliable and experienced service has been known for a long time.
If a company has been on the market for many years and 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 service center are restored.
Other service centers trust us and refer complex cases to us.

How many masters in areas

If there are always several engineers waiting for you 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 care of right away.
2. you give your Macbook for repair 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 should answer it as accurately as possible.
So that you can imagine what exactly you need.
They will try to solve the problem. In most cases, from the description you can understand what happened and how to fix the problem.


In this article we will look at the 6 main reasons why a MacBook may not turn on. We will tell you about possible ways diagnostics at home, and we will also try to help you troubleshoot the problem.

Let's immediately define that by “does not turn on” in this article we mean the state of the computer in which it does not respond in any way to pressing the power button, whether with the charger connected or not.

This article will most likely be useless if your MacBook, after pressing the power button:

  • makes a power-on sound
  • fan noise can be heard
  • The sleep indicator lights up (if equipped)
  • when pressing a key Caps Lock it lights up

The main reasons why a MacBook won't turn on

  1. One of the most common reasons for “non-starting” is a breakdown of the power supply. The most common component that fails is the MagSafe magnetic tip. The main reason for failure is the twisting of the wire and, as a result, damage to the internal contacts of the tip. In this case, you need to either replace the charging cable with a MagSafe tip or buy an original charger. To test this hypothesis, connect a known working power supply to the computer. If you don't have one, take your computer to work with you, and on the way, stop by any store that sells original Apple chargers. Ask to connect Charger to your computer and if everything works, you can immediately purchase it.

    2. By the way, have you tried inserting the power supply into a different outlet? ;-)
  2. Malfunction peripheral devices can also cause this failure. Disconnect devices one at a time and after disconnecting each device, try turning on the Mac. If at some point it turns on, then the problem was in the last device that was turned off.
  3. SMC System Management Controller Failure The main symptoms of SMC failure include the following:
    • no response when pressing the power button
    • The indicator light on the power supply is not working properly. For example, it does not light up when connected to a computer.
    In this case, you should try resetting the SMC parameters. This is done in two ways:
    • connect the charger to the MacBook then press and release at the same time the following buttons are Shift+Ctrl+Alt+power button (on MacBook computers starting in 2016, the Touch ID button is the power button). Pay attention to the indicator light on the power supply; if the reset is successful, it should go out and light up again first in green and then in orange. More details about SMC reset You can read it on the Apple website here
    • If resetting the SMC does not help, you can try disconnecting the battery for 5-10 seconds.
  4. Deep or complete discharge of the battery. In terms of its symptoms, deep discharge is very similar to point 3 of this article. This problem can be solved by resetting the SMC controller, or you can also try disconnecting the battery from the motherboard.
  5. Failure of the ON button. Perhaps the main and only reason why the power button may break is the external factor of liquid getting on the keyboard. The fact is that since 2008, the power button has been built into the keyboard and its contacts go through it directly into the motherboard. Therefore, liquid that gets on the keyboard can “touch” the conductive paths of the power button and damage them. In order to eliminate this outcome, you need to disconnect the keyboard from the motherboard and connect the power supply. If the MacBook turns on, then the problem is definitely with the keyboard. However, the diagnostic method described above is only suitable for models released from 2011 inclusive.
  6. If you tried everything that was written in this article and nothing helped you, then most likely it’s rubbish - the motherboard has failed. Unfortunately, you won’t be able to do anything at home without skills and special equipment. In any case, you will have to contact service center.

    7. It is worth understanding that if your MacBook does not turn on due to physical impact, for example, a strong blow or liquid ingress (popularly called a flood), then you cannot do without contacting a service center.

Many of you have probably heard that Apple's operating system is famous for its reliability and the 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 latest update operating system (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. This is what we will talk about. 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 give 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 the majority are like that modern models, 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 suitable for your Mac, you will most likely see the familiar window Mac downloads OS - this means 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.