Apple iMac G5 - Manual (Page 58)

58 Chapter 5 Troubleshooting
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 Option key as it starts up.
4 Click Apple Hardware Test when the list of available startup volumes appears.
5 Click the right arrow.
6 When the Apple Hardware Test main screen appears (after about 45 seconds), follow
the onscreen instructions.
7 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.