Problem | Cause | Solution |
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Power LED flashes RED once | Power failure (power supply | 1. Check if a device is causing the problem by |
every two seconds. | is overloaded). | removing ALL attached devices. Power on the |
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| system. If the system enters the POST, |
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| then power off and replace one device at a time |
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| and repeat this procedure until failure occurs. |
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| Replace the device causing the failure. Continue |
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| adding devices one at a time to ensure all |
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| devices are functioning properly. |
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| 2. Check the power supply functionality. |
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| a. Disconnect the AC power. |
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| b. Remove all internal power supply cables |
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| from the system board. |
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| c. Plug in the AC power. |
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| • If the power supply fan spins and the |
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| BIST LED lights, the power supply is |
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| functional, so replace the system board. |
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| • If the power supply fan does not spin or |
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| the BIST LED does not light, replace the |
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| power supply. |
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System Diagnostics and Troubleshooting
Troubleshooting Scenarios and Solutions 145