Troubleshooting Without Diagnostics
Solving Power Supply Problems (Continued)
Problem | Cause | Solution | |
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Power LED flashes Red four | Power failure (power | 1. | Check that the voltage selector, |
times, once every second, | supply is overloaded). |
| located on the rear of the power |
followed by a |
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| supply (some models), is set to |
pause. The Power LED will |
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| the appropriate voltage. Proper |
continue flashing until the |
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| voltage setting depends on your |
problem is resolved. |
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| region. |
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| 2. | Open the hood and ensure the |
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| seated into the connector on the |
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| system board. |
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| 3. Check if a device is causing the | |
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| problem by removing ALL |
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| attached devices (such as hard, |
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| diskette, or optical drives, and |
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| expansion cards). Power on the |
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| system. If the system enters the |
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| POST, then power off and |
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| replace one device at a time |
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| and repeat this procedure until |
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| failure occurs. Replace the |
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| device that is causing the |
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| failure. Continue adding devices |
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| one at a time to ensure all |
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| devices are functioning |
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| properly. |
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| 4. | Contact an authorized service |
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| provider to replace the power |
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| supply. |
5. Replace the system board.
Troubleshooting Guide |