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| Troubleshooting |
| Symptom Charts/ USB Devices - 60 |
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No response to any | 1 | Verify that keyboard and mouse connections are secure. | ||
key on keyboard | 2 | Remove all USB devices, except the keyboard and mouse. If | ||
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| the keyboard operates correctly, troubleshoot the other USB |
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| devices. |
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| 3 | Switch the keyboard to a different USB port. If the keyboard |
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| operates correctly, the first port was bad. Replace the logic |
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| board. Note: You can also use Apple System Profiler to verify |
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| USB ports. |
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| 4 | Mac OS 9: Start up with extensions off. If the problem is |
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| resolved, troubleshoot the extensions. |
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| 5 | Mac OS X: Relaunch Finder. |
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| 6 | Start up from the system installation CD or system restore |
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| CD that came with the computer. If the keyboard operates, |
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| reinstall system software. |
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| 7 | Replace the keyboard. |
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| 8 | Replace the logic board. |
