Apple Hardware Test

[MaybeMaybeNot 1,759]

Apple Hardware Test Can Help Us With Your Issue 

 

Using Apple Hardware Test

1. Shut down your computer. Then, press the power button to turn it back on.
2. Press and hold the D key before the gray startup screen appears.
3. It takes a minute or so for AHT to start up and inspect your hardware configuration. While this is taking place, an icon appears on the screen:
   
4. When the process is complete, select your language and click the right arrow. If you aren't using a mouse, you can use the up and down arrows to select a language and then press the Return key.
5. The AHT console appears. You can choose which sort of test or tests to perform:

   Note: Your test results will appear in the window in the bottom-right of the console.

   • To perform all of the basic tests, click the Test button or press the "T" key or the Return key.
   • To perform a more thorough diagnostic test, select the "Perform extended testing" checkbox under the Test button before you click the Test button.

 

 

To exit AHT, click Restart or Shut Down at the bottom of the window.

 

 

Some Macintosh computers that shipped with OS X Lion and later support the use of Apple Hardware Test over the Internet. These computers will start up to an Internet-based version of AHT if the hard drive does not contain AHT.  An Internet-enabled connection via Ethernet or Wi-Fi is required to use this feature. Internet-based AHT functions the same as AHT on the hard drive or flash storage outlined above.

 

Using Apple Hardware Test on computers with OS X v10.7 and earlier

AHT is located on the Applications Install Disc 2 and should be included with your computer or the MacBook Air Software Reinstall Drive on a MacBook Air (Late 2010). To start AHT on these computers make sure the Applications Install Disc 2 is inserted into the built-in optical drive, external Apple Superdrive, or for the MacBook Air (Late 2010) be sure the MacBook Air Software Reinstall Drive is inserted into a USB port. Then, follow steps 1-6 outlined in the previous section of this article.

 

 

What to do if you get an error in AHT

 

1. Confirm that the power adapter is connected if you're using a Mac notebook.
2. Confirm that all external devices are disconnected from your computer.
3. Record any error code given so that you can give the information to us via the forum upload