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| Troubleshooting |
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| Symptom Charts/ Startup - 42 |
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System shuts down | 1 | Make sure the power cord is plugged in firmly. | |||
intermittently | 2 | Check that the power source is turned on and the correct | |||
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| voltage is present. | |
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| 3 | Replace the power cord. | |
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| 4 | Make sure the air vents are clear. | |
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| 5 | Check that the fan cable is connected and the fan is | |
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| operational. | |
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| 6 | Check that the heatsink is properly attached to the processor. | |
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| 7 | Power Macintosh G4 (PCI Graphics): Reset the Cuda chip. See | |
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| “Resetting the Cuda Chip” in this chapter. | |
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| 8 | Reset the logic board: | |
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| • | Power Mac G4 (AGP Graphics): Refer to “Resetting the |
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| PMU on the Logic Board” in this chapter. |
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| • | Power Macintosh G4 (PCI Graphics): Refer to “Resetting |
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| the PCI Logic Board” in this chapter. |
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| 9 | Replace the power supply. | |
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| 10 | Replace the logic board. | |