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Most Mac users will experience years of using a Mac without any problems. But every so often, a hardware issue could surface that could significantly impact how your Mac performs.
My question is very simple. I have some trouble on my MBP13 mid-2010 (MC375LL/A) and I want to diagnose it using the Apple Hardware Test. I try to hold the D key down during restart of the MBP but nothing happens. I think it is due to the fact that I need to use the DVD 2 coming with the MBP. Unfortunately I don't have the DVD currently. Not all Mac models can run the Internet-based Apple hardware test. Some MacBook models need to use a local version of the hardware test, which has to be installed on the hard drive or saved on OS X DVD. Other Macs manufactured after 2013 can use the latest version of the Apple hardware test, which is called the Apple Diagnostics test.
KeyboardTest has been used to test and check for faulty keyboards by PC enthusiasts and production line environments (in batch mode testing) since 2003. Although desktop keyboards can be quickly and cheaply replaced, this is not the case for laptop computers where the.
Identifying the cause of problems — hardware or software — is the first step to fixing them. It could make a trip to an Apple Store or certified reseller easier knowing you've done all you can to identify and, whenever possible, fix the problem yourself — saving you downtime and a potentially costly repair.
Built into every Mac is a way to run an Apple Hardware Test, also known as an Apple Diagnostics.
Hardware Tests are an effective way to identify the cause of a Mac performance problem, which could be a CPU or GPU issue, a failing disk drive, an overloaded memory, a fan overheating, or any number of other potential faults. If you suspect it’s a hardware problem, Hardware Tests are the way to troubleshoot on Macs built before 2013. In newer models, those built after 2013, those same tests are labeled Apple Diagnostics.
How to run Apple Diagnostics on any Mac
In some cases, a hardware problem is so severe that you won’t be able to switch your Mac back on. Thankfully, if you can run an Apple Diagnostics or Hardware Test, Apple Support suggests this is a way to restart your Mac, even if it refuses to switch back on through other means.
Whether you are running an Apple diagnostics or a Mac hardware test (on older devices), Apple recommends printing their support instructions on how to run these tests. Once you’ve got the instructions in front of you, Apple recommends shutting down your Mac and disconnecting all the peripherals. Now, your Mac is ready to start Apple Diagnostics:
Apple silicon
- Start up your Mac.
- Continue to press and hold the power button as your Mac turns on.
- Release the power button when the startup options window appears.
- Press Command-D to run the Diagnostics.
- Apple Diagnostics will run automatically. When it is complete, it will present a list of the problems encountered.
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- Start up your Mac and press and hold the D key while it turns on.
- Release the key when the progress bar appears or when you're asked to select a language.
Common Mac hardware issues
At this point, you can either follow on-screen instructions or contact Apple Support — arranging a Genius Bar appointment — or go to an Apple Authorized Service Provider to make repairs to fix the problems. Make a note of any reference codes. If you see the ADP000 code, congrats, no issues are found on your Mac!
Some of the most common hardware error codes indicate problems with:
- Wi-Fi (CNW001, CNW003, CNW004, CNW005, CNW006, CNW007, CNW008);
- Keyboard (NDK001, NDK003, NDK004)
- Memory (PPM001, PPM002-PPM015)
- Battery (PPT001-PPT007)
- Processor (PPR001)
- Graphics processor (VFD006)
Most Mac error codes suggest a failure of the component they reference or a related component that is causing a problem with the hardware. In most cases, an Apple specialist or technician may be needed to resolve this issue.
However, before you send your poor, unhealthy Mac off to the shop, there are several fixes you could try at home, such as resetting the PRAM or SMC. This can fix some of the most common errors, including problems with the logic board and fan.
Disk Utility (built into every Mac) is useful for fixing memory (RAM), hard disk, and external drive problems, as are several third-party apps.
For those with older Macs, when running an OS X Hardware Test, an alert message will appear once complete with a list of the problems encountered. Again, you have the option of following on-screen instructions to restore the Mac, or re-booting the device using a startup disk, or taking the Mac to a store or Authorized Service Provider.
Run Mac Hardware Test
In any scenario involving hardware, you need to be aware that you are at risk of losing any items on your Mac that haven't been backed up to the cloud. We recommend storing as much as possible with a cloud provider, such as Dropbox or Apple iCloud.
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Another way to improve Mac performance
What happens if you run a Mac diagnostics and it comes back with nothing? Does this mean you need to buy a new Mac? Or give up using Mac altogether, switching to another device and operating system?
An Apple Diagnostics or Hardware Test that reports a lack of problems indicates it could be a software issue. Another alternative worth exploring, especially if your Mac is overheating or slowing down, is that your storage is too full of junk, clutter, applications, and duplicate files and photos.
On average, Mac users have 62GB of data, files, apps, and images they do not need. Too many files slow down and overheat computers, making them difficult to use and causing them to crash more often.
CleanMyMac X is designed to clear up junk, clutter, and get your Mac back to peak performance. With over 4 million downloads and hundreds of positive reviews, we know that CleanMyMac X has carefully removed over 11 million unnecessary apps and over 2.5 billion gigabytes of data clogging up Macs all over the world.
With two-click removals, you can quickly clean loads of data, making your Mac easier to use and freeing up space for new documents, downloads and images. Once you've run a Hardware Test or Apple Diagnostics, use CleanMyMac X (it's free to try) to identify and fix any other issues that are causing your Mac to run slowly or overheat.
We hope this article was helpful and you found the answers to all your questions here. Stay tuned!
Updated: June 13, 2021 Home » Freeware and Software Reviews
If your computer crashes after installing a new set of RAMs, there are few possibilities. The first possibility is likely faulty RAM, the second possibility is hardware compatibility. More often than not if it is compatible due to overspec or underspec, your system will not boot up and will make a beeping sound.
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Faulty RAMs are pretty rare, almost unlikely if you bought a branded RAM such as Kingston, Samsung, Corsair, Apache and etc, this is because they performed many tests before distributing them to dealers. Based on my experience, here are some possibilities:
- Defective RAM ( Use both Windows Memory Diagnostics and Memtest86 to perform a deep scan, run twice to confirm, if both tests show the RAM is in good condition, then it is most definitely another issue. )
- Outdated Motherboard BIOS ( Update your Motherboard BIOS if it is outdated )
- Outdated drivers and chip-sets ( Update your drivers and chipsets )
- Overheating of RAM ( Use a table fan to test this )
- Faulty RAM slot ( Swap RAM between slots to see if problem continues )
- Incompatibility with your other hardware such as Asus NVidia GTX 970 Graphic Card. ( I’ve upgraded my RAM to 32GB from 16GB for my Dell XPS 8700, unfortunately, the solution to limit the RAM in Windows as shown in Reddit doesn’t work for me. Read more – GTX 970 unstable on system with 32 GB RAM or 64 GB RAM )
After much trial and error, swapping graphic cards and RAMs. I’ve discovered that my Asus Strix GTX 970 is unstable when my Dell XPS 8700 has a 32GB Kingston HyperX Fury or 24GB Kingston + Samsung RAM. It runs without problem when my system has both my old (4x4GB Samsung) and new (2x8GB Kingston) 16GB RAM installed, and with no problem when it is 32GB with my older GTX 745 graphic card. This is a very old issue, Nvidia appears to be dragging their feet or this is exclusively an Asus GTX970 problem.
↓ 01 – Windows Memory Diagnostics Tool | 17 Tests | Windows
This Window memory Diagnostics Tool is the Pre-installed memory testing software available in Microsoft Windows Vista, Window 7, Windows 8 or 8.1 & Windows 10. The Memory Diagnostics Tool will run automatically when you restart Windows. It might take several minutes for the tool to finish checking your computer’s memory.
Once the test is completed, Windows will restart automatically. If the tool detects errors, you should contact your computer manufacturer for information about fixing them, since memory errors usually indicate a problem with the memory chips in your computer or other hardware problem. Type “Mdsched” and search for the tool.
↓ 02 – Passmark MemTest86 | 13 Tests | Windows | Mac | Linux
MemTest86 is the original, free, stand alone memory testing software for x86 computers. MemTest86 boots from a USB flash drive or CD and tests the RAM in your computer for faults using a series of comprehensive algorithms and test patterns. The latest version of MemTest86 supports all the current technologies, including:
- DDR4 RAM (and DDR2 & DDR3) support
- XMP – high performance memory profiles
- UEFI – The new graphical standard for BIOS
- 64bit – From version 5, MemTest86 is native 64bit code
- ECC RAM – support for error-correcting code RAM
- Secure boot – With MemTest86 being code signed by Microsoft
- Graphical interface, mouse support and logging of results to disk
- Self booting off USB or CD, without needing DOS, Linux nor Windows
- Dual booting – Will boot to V4 in BIOS and V6 in UEFI from a single flash drive
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↓ 03 – Rember | Unknown Tests | Mac
Rember is a front-end GUI to the ‘memtest’ command line memory testing program. This application will allow the user to select the number of test loops, as well as the amount of memory to test. There is a ‘Log’ tab that will allow the user to monitor memory testing. The user can toggle a ‘verbose’ switch to limit the amount of output, and can also choose to quit Finder and other applications.
Defective memory can cause computers to malfunction, crash, and behave in a variety of ways which can sometimes baffle end users and computer technicians alike. Apple provides hardware test CDs with most of their products, and there are some third-party utilities for macOS which perform memory testing.
In my experience, these tools have not always been able to quickly and efficiently diagnose memory problems. Rember has been designed to simplify the testing, and diagnosis of these problems.
↓ 04 – Apple Diagnostics (Apple Hardware Test) | Mac
Macbook Hardware Test
Apple Diagnostics is a great way to check your Mac computer’s hardware. Apple Diagnostics helps to identify the potential source of a hardware issue and provides first steps to try and resolve it. Apple Diagnostics will also help you get in touch with Apple Support for further assistance.