User's Guide
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:
1 Disconnect all external devices from your computer except the power adapter.
2 Restart your MacBook Air while holding down the D key.
3 When the Apple Hardware Test chooser screen appears, select the language you want
to use.
4 Press the Return key or click the right arrow button.
5 WhentheAppleHardwareTestmainscreenappears(afterabout45seconds),follow
the onscreen instructions.
6 If 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.
If this procedure doesn’t work, contact AppleCare or your local Apple Retail Store.