Chapter 5 Troubleshooting 69
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:
1Disconnect all external devices from your computer except the power adapter.
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 Option key as it starts up.
A list of available startup volumes appears.
4Click Apple Hardware Test and click the right arrow.
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 does not detect a
hardware failure, the problem might 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.
Installing Xcode Tools
To install just the Xcode Tools, which are intended for software developers to use,
follow these steps:
1Insert the Mac OS X Install Disc 1 that came with your computer.
2Double-click Xcode Tools.
3Double-click XcodeTools.mpkg.
4Follow the onscreen instructions.
Locating Your Product Serial Number
You can see your computer’s serial number by choosing Apple () > About This Mac
and then clicking the More Info button, or by opening System Profiler (in Applications/
Utilities) and clicking Hardware. The serial number for your PowerBook is also located in
the battery bay. For more information about removing the battery, see “Removing and
Replacing the Battery” on page 52.