44 Chapter 3 Problem, Meet Solution
Using Apple Hardware Test
If you suspect a problem with the MacBook Air hardware, you can use the Apple
Hardware Test application to help determine if there’s a problem with one of the
computer’s components, such as the memory or processor.
To use Apple Hardware Test on your MacBook Air:
1Disconnect all external devices from your computer except the power adapter.
2Restart your MacBook Air while holding down the D key.
3When the Apple Hardware Test chooser screen appears, select the language for your
location.
4Press the Return key or click the right arrow button.
5When the Apple Hardware Test main screen appears (after about 45 seconds), follow
the onscreen instructions.
6If Apple Hardware Test detects a problem, it displays an error code. Make a note of the
error code before pursuing support options. If Apple Hardware Test doesn’t detect a
hardware failure, the problem may be software related.
For more information about Apple Hardware Test, see the Apple Hardware Test Read
Me file on the Mac OS X Install Disc 1.