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Apple Mac Pro User Manual: Using Apple Hardware Test

Apple computer user's guide mac pro computer.
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Using Apple Hardware Test

You can use Apple Hardware Test to help determine if there is a problem with your
computer's hardware.
To use Apple Hardware Test:
1
Disconnect all external devices from your computer except the keyboard and mouse.
If you have an Ethernet cable connected, disconnect it.
2
Insert the Mac OS X Install Disc 1 that came with your computer.
3
Restart your computer and hold down the D key as it starts up.
A list of available startup volumes appears.
4
Click Apple Hardware Test and click the right arrow.
5
Follow the onscreen instructions when the Apple Hardware Test main screen appears
(after about 45 seconds).
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 does not 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.
Chapter 4
Troubleshooting
63

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