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Remove the failed power supply and replace it with a new power supply v Verify that the replacement power supply is working correctly Important: Before you proceed with these instructions, review the IBM Systems Safety Notices provided in the IBM Media Terms and Conditions CD that is included with your appliance model.
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CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all current from the device, ensure that all power cords are disconnected from the power source.
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Identifying a failed power supply Each power supply unit uses an LED that indicates whether the unit is working as expected. Figure 1 describes the LEDs that are displayed by the power supply units for the appliance: Figure 1. Power supply LEDs The following table indicates the potential problems that can occur with the power supply and suggests actions for you to use to correct the detected problems: Table 1.
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Table 1. Power supply LED combinations for detecting potential problems (continued) Error Description Action Notes No AC power is going to This condition occurs when 1. Replace the power the appliance, or there is a a second power supply is supply.
Replacing a failed power supply Before you begin When you replace a failed power supply, make sure that you do not unplug the power supply unit that is working because this action disrupts service to the appliance. Procedure Complete the following steps to replace a failed power supply: 1.
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