With PowerBook G4 (17-inch) computers, Apple Hardware Test (AHT) is included on the same DVD disc you use to install or restore software. This DVD is named "PowerBook G4 17 inch Software Install and Restore".
Running Apple Hardware Test
To use AHT on your PowerBook G4 (17-inch) computer, follow these steps:
1. Insert the disc named "PowerBook G4 17 inch Software Install and Restore" into the computer.
2. Choose Apple menu > Restart, and hold the Option key while the computer starts up. The startup manager appears (Figure 1).
3. Click the Apple Hardware Test volume in the startup manager.
Figure 1 Startup manager
4. Click the arrow that points to the right.
5. Follow the onscreen instructions.