Mac diagnostics, or how to independently detect hardware problems on Apple computers. How to Use the Apple Hardware Test to Diagnose Mac Problems How to Diagnose Mac Hardware

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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 with suppliers directly, 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

A good service values ​​your time, so it offers free delivery. And for the same reason, repairs are carried out only in the workshop of a service center: correctly and according to technology can only be done 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.

Before going to a service center with their Mac, any user can independently check their computer for problems. Perhaps, knowing what the problem is, the user will be able to carry out simple repairs on his own.

Since Apple’s instructions are of little use in this case—they only direct you to a service center—I’ve compiled my own guide to solving problems with a Mac.

  • If the computer was released after June 2013, then the check program is called “Apple Diagnostics”
  • If the computer was manufactured before June 2013, then the test program is called “Apple Hardware Functional Test”

Regardless of the name, the utilities work almost identically.

How to run Apple Diagnostics?

Step 1: Disconnect all devices except the mouse, keyboard, network cable and monitor.

Step 2: Turn off your computer.

Step 3. Turn on the computer and press the D button. Hold it until a special screen appears with a choice of language.

Step 4. Select Russian language and the verification will begin automatically. It does not last very long - 2-3 minutes.

If regular diagnostics do not start for you, then press Option+D when loading and diagnostics will start using the Internet. For example, I had to do just that, because I changed the hard drives in my MacBook a long time ago and, naturally, I no longer have a recovery partition. This picture can hang for 5 minutes. If it freezes, restart your computer.

This is what the diagnostics look like on a MacBook Pro 2011. First, find and select the line “Select Russian as the main language”:

After that, click “Test”:

Apple Error Codes on MacBook

Error codeProblemWhat to do?
ADP000No problems foundIf there is still a problem, then look for a solution on the Internet.
CNW001
CNW003
CNW004
CNW005
CNW006
There may be a problem with the Wi-Fi module.
CNW007
CNW008
No Wi-Fi networks detected. There are no Wi-Fi networks available, or the Wi-Fi module is faulty.Try the Wi-Fi network in this location on another device. If it works, then you have a problem with the Wi-Fi module.
NDC001
NDC003
NDC004
NDC005
NDC006
There may be a problem with the camera.
NDD001There may be a problem with the USB module.Disconnect all USB devices and run the scan again. Then connect the working device one by one to the Wi-Fi modules and start the test.
NDK001
NDK003
NDK004
There may be a problem with the keyboard.
NDL001There may be a problem with the Bluetooth module.Try connecting several different devices in the system and find out if there really are any problems with Bluetooth.
NDR001
NDR003
NDR004
There may be a problem with the trackpad.
NDT001
NDT002
NDT003
NDT004
NDT005
NDT006
There may be a problem with the Thunderbolt module.Disable Thunderbolt devices. Run the scan again.
NNN001Serial number not found.
PFM001
PFM002
PFM003
PFM004
PFM005
PFM006
PFM007
There may be a problem with the System Management Controller (SMC).
PFR001There may be a problem with the computer's firmware.
PPF001
PPF003
PPF004
There may be a problem with the fan.You can theoretically disassemble the laptop, remove the fan and clean it. I do this once every six months.
PPM001There may be a problem with the memory module.You can disassemble the laptop. Remove the memory modules, if possible, swap the sticks.
PPM002
PPM003
PPM004
PPM005
PPM006
PPM007
PPM008
PPM009
PPM010
PPM011
PPM012
PPM013
PPM014
PPM015
There may be a problem with the built-in memory.
PPP001
PPP002
PPP003
There may be a problem with the power adapter.Disconnect the power adapter from the network and from the computer. Connect again and test.
PPP007The power adapter has not been tested.Reconnect the power adapter to a guaranteed working outlet. Run the scan again.
PPR001There may be a problem with the processor.It’s sad if the error repeats... Here it’s definitely better to take it to service.
PPT001Battery not detected.
PPT002
PPT003
The battery will need to be replaced soon. It is operational, but its capacity has decreased.On some Mac models, you can completely replace the battery yourself.
PPT004You need to re-do the diagnostics via the Internet (described at the beginning of the article). Via the Internet, Apple uses the most advanced battery diagnostic tools. If the problem is confirmed and the performance of the battery does not suit you, then think about replacing it.
PPT005The battery is not installed correctly. Shut down and turn off your computer. Your computer needs service.Disconnect and reconnect the battery.
PPT006The battery requires maintenance. The battery is faulty, although this may not affect its performance or capacity. Until the test is completed, you can continue to use the battery without harming your computer.I would still replace the battery if the capacity drops to zero, because without it, Mac OS automatically reduces the computer's performance. It even goes as far as noticeable brakes.
PPT007The battery needs to be replaced. The battery is in good condition, but its capacity has decreased significantly. Until you replace the battery, you can continue to use it without harming your computer.The above advice is given!
VDC001
VDC003
VDC004
VDC005
VDC006
VDC007
There may be a problem with the SD card reader.
VDH002
VDH004
There may be a problem with your storage device.Check hard drives for errors using special utilities.
VDH005OS X recovery cannot be started.OS X can even be installed from a flash drive. Look for instructions - it's not difficult.
VFD001
VFD002
VFD003
VFD004
VFD005
VFD007
There may be a problem with the display.
VFD006There may be a problem with the GPU.
VFF001There may be a problem with the audio hardware component.

What else do you need to know?

The test does not always produce errors. I have some problems with the SD slot, but the test did not reveal any errors. Extensive testing may be required.

The easiest way to avoid the help of service centers when searching for hardware problems (not all of them can boast of a good reputation) is to use the built-in Mac diagnostic methods. In this material we will tell you how to launch and use " " And " Apple Diagnostics».

In contact with

Using standard diagnostic tools, you can effectively detect hardware faults (problems with the hard drive, solid-state drive, RAM, graphics processor, motherboard and other nooks and crannies of the hardware). How to do this?

On which Macs which utility?

Regardless of (MacBook, iMac, Mac mini or Mac Pro) and the year of its release, the operating system includes a utility for self-diagnosis of the hardware. On computers manufactured before June 2013, it is called “ Functional test of Apple hardware"(Apple Hardware Test - AHT), and after - " Apple Diagnostics».

Before starting any of the utilities, be sure to disconnect all peripheral devices (including optical drives, if you still have such an antiquity) except the keyboard, mouse, display and Ethernet adapter. Some versions of OS X Lion and later may require Ethernet or Wi-Fi to run the Internet version of AHT. It is no different from its offline counterpart.

To use AHT, be sure to connect your MacBook to a power source.

List of keyboard shortcuts

If you don’t have a mouse, the following shortcuts will come in handy:

  • Option (⌥) + D: run diagnostics via the Internet;
  • Command (⌘) + G: start operation;
  • Command (⌘) + L: display a list of languages;
  • Command (⌘) + R: run the test again;
  • S: shutdown;

How to Run Diagnostics on Mac (Apple Hardware Functional Test or Apple Diagnostics)

Note: " Functional test of Apple hardware" And " Apple Diagnostics" work in the same way. The only caveat is to launch " Apple Diagnostics“An active Internet connection is required, and the interface will be much nicer.

1 . Turn on or restart your Mac if it's turned on.

2 . While turning on, press and hold the " D» until the language selection screen appears.

3 . Select a language (if a mouse is not connected to the computer, then select a language using the arrows and enter with the “Enter” key).

4 . Mac diagnostics will begin.

After the test is completed, the results will be displayed.

To exit the ANT utility, click the " Reboot" or " Switch off"at the bottom of the window.

What do the results say?

If problems with the hardware are detected during the test, then get ready to see an error and some explanatory details.

You can decipher AHT errors on the Apple technical forum, and in general I recommend that you go there first when looking for solutions to problems with Apple gadgets. True, you will need knowledge of English, at least with a dictionary.

Apple Diagnostics error codes and their interpretation can be found below:

ADP000- No problems were found on the computer;

CNW001, CNW003, CNW004, CNW005, CNW006- There are problems with the Wi-Fi module on the computer;

CNW007, CNW008- No Wi-Fi networks detected. There are no available Wi-Fi networks or the Wi-Fi module is faulty;

NDC001, NDC003, NDC004, NDC005, NDC006- The camera is faulty;

NDD001- There is a problem with the USB module. Disconnect all external devices except the keyboard, mouse, and Ethernet adapter. Run the scan again. If this code appears again, contact your service center;

NDK001, NDK003, NDK004- There is a problem with the keyboard;

NDL001- There is a problem with the Bluetooth module;

NDR001, NDR003, NDR004- There is a problem with the trackpad;

NDT001, NDT002, NDT003, NDT004, NDT005, NDT006- There may be a problem with the Thunderbolt module. Disconnect external Thunderbolt devices and run the scan again. If this code appears a second time, contact your service center;

NNN001- The serial number could not be found. The computer requires service, contact service;

PFM001, PFM002, PFM003, PFM004, PFM005, PFM006, PFM007- There is a problem with the system management controller (SMC);

PFR001- There may be a problem with the computer firmware;

PPF001, PPF003, PPF004- There may be a problem with the fan;

PPM001- There is probably a problem with the memory module;

PPM002, PPM003, PPM004, PPM005, PPM006, PPM007, PPM008, PPM009, PPM010, PPM011, PPM012, PPM013, PPM014, PPM015- There may be a problem with the built-in memory;

PPP001, PPP002, PPP003- There is probably a problem with the MagSafe power adapter. Try unplugging the power adapter from your Mac and the outlet, then plugging it in again. Run the scan again. If this code appears a second time, contact your service center;

PPP007- There may be a problem with the power adapter or it is not connected. To test the power adapter, reconnect it to your computer and wall outlet. Run the scan again. If this code appears a second time, contact your service center;

PPR001- There is probably a problem with the processor;

PPT001- The battery could not be detected;

PPT002, PPT003- The battery will need to be replaced soon. It is operational, but its capacity has decreased.

PPT004, PPT006- The battery requires maintenance. The battery is faulty, although this may not affect its performance or capacity;

PPT005- The battery is not installed correctly. Shut down and turn off your computer;

PPT007- The battery on your Mac needs to be replaced. The battery is in good condition, but its capacity has decreased significantly. Until you replace the battery, you can continue to use it without harming your computer.

VDC001, VDC003, VDC004, VDC005, VDC006, VDC007- A problem has probably been detected with the SD card reader;

VDH002, VDH004- There is probably a problem with the storage device;

VDH005- Cannot start macOS recovery;

VFD001, VFD002, VFD003, VFD004, VFD005, VFD007- There is probably a problem with the display;

VFD006- There is probably a problem with the GPU;

VFF001- There is probably a problem with the audio hardware component.

In any case, if it was not possible to avoid repairs at the service center, we strongly recommend that you contact only certified specialists who specialize exclusively in Apple equipment. It won’t be cheap, but purchasing a new gadget is much more expensive. It’s better to completely forget about the basement workshops “at Uncle Vasya’s”. Repairing Apple devices requires a very meticulous approach and advanced skills.

If your Mac is experiencing any unusual technical issues, you can use Apple Diagnostics to find out what's causing it and even fix it.

Diagnostics Apple will run several tests to identify problems related not to the system, but to the device itself. It could be a broken port, a bad battery, problems with the display, or anything like that.

This program is essentially a reincarnation of the Apple Hardware Test program. Apple Diagnostics is designed for new Macs, and 2013 and older models use Apple Hardware Test. The old program displays more information, and Diagnostics is more concise. However, both programs work the same and are great for identifying and solving problems with Mac parts.

Opening Apple Diagnostics on a Mac is as simple as pressing a keyboard shortcut at startup. More about this later.

How to open DiagnosticsApple onMac

  1. Disconnect all devices and cords from your Mac (keyboard, mouse, external display, charger, etc.).
  2. Shut down your Mac using the  Apple menu.
  3. Turn on your Mac by pressing the power button and immediately hold down the “D” key on your keyboard.
  4. Continue holding the “D” key until the language selection screen appears. After that, you can select yours and continue.
  5. Apple Diagnostics will run several tests. On the tap you will see a progress indicator with the remaining time. The process usually takes a few minutes.
  6. After the process is completed, you will be notified of any problems found. If desired, the tests can be run again. If this is not necessary, click Proceed, Restart, or Shut Down.

Many different messages about different problems may appear. If you don't know what to do, you can contact Apple support or contact a specialist.

Please note that Apple Diagnostics may not detect all problems, and in this case, the only thing you can do is immediately seek help from a specialist. Such problems include cases when the computer periodically does not start or, on the contrary, turns off by itself. Also, the program will not detect physical damage to the device, including damage from contact with liquids.

Apple Diagnostics isn't perfect, but it's a good place to start when solving any technical problems with your Mac, iMac, MacBook, MacBook Pro, and other models.