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| Troubleshooting |
| Symptom Charts/Power - 5 | |
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| is blank; | 1 | If sleep LED is continually on, backup battery power has been |
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Screen | |||||
backlight isn’t on; |
| interrupted. Restart computer by holding down | |||
computer doesn’t |
| Control and power on key. Wait 5 seconds and press power on | |||
respond | 2 | key. If computer doesn’t restart, repeat | |||
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| Restart computer. | ||
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| 3 | Disconnect power adapter, remove battery, and restart | |
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| 4 | computer in | |
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| Check power adapter cable. | ||
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| 5 | Try | |
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| 6 | Try | |
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| 7 | Disconnect backup battery for 2 minutes. | |
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| 8 | Check all I/O logic board cables and connections. | |
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| 9 | Replace sound card. | |
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| 10 | Replace microprocessor board. | |
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| 11 | Replace power supply card. | |
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| 12 | Replace PMU card. | |
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| 13 | Replace I/O logic board. | |
