Apple MD771LL/A manual Using Apple Hardware Test, To use Apple Hardware Test

Using Apple Hardware Test

You can use Apple Hardware Test to help determine if there is a problem with your computerÕs hardware.

To use Apple Hardware Test:

1Disconnect all external devices from your computer except the keyboard and mouse. If you have an Ethernet cable connected, disconnect it.

2Insert the Mac OS X Install Disc 1 that came with your computer.

3Restart your computer and hold down the D key as it starts up. A list of available startup volumes appears.

4Click Apple Hardware Test and click the right arrow.

5Follow the onscreen instructions when the Apple Hardware Test main screen appears (after about 45 seconds).

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 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

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