Install or replace a model 55x or 720 power supply with power on

Learn how to install a second power supply, or replace one of two power supplies present in the system. Use the procedure in this section to accomplish this task.

1. Perform the prerequisite tasks described in Before you begin.
2. On a rack-mounted system unit, open the back rack door.
3. If a failing power supply is present, identify the power supply that needs to be replaced. For instructions, see Identify a failing part.
4. Disconnect the power cable from the failing power supply at the back of the system.
5. Place the rack-mounted system or expansion unit in the service position.
6. Remove the service access cover. For instructions, see Remove the service access cover from the model 285, 51x, 52x, 55x, 710, or OpenPower 720.
7. Ensure that the power supply bay is empty by doing one of the following methods:
   1. Remove the power supply filler A by grasping the handle and pulling the filler inward in the direction of the arrows and then out of the system.
      Figure 1. Remove a power supply filler from a rack-mounted system unit

      
      Figure 2. Remove a power supply filler from a stand-alone system unit

      
   2. Remove a failing power supply by doing the following steps:
      1. Squeeze the tabs on the power supply handles A as shown in Figure 3 or Figure 4 and then slowly rotate the handles B to the open position to release the power supply from the system.
      2. After the power supply is released, use the power supply handles to pull the power supply C out of the system.
         Figure 3. Remove a power supply from a rack-mounted system unit

         
         Figure 4. Remove a power supply from a stand-alone system unit

         
8. Open the power supply handles on top of the new power supply.
9. As shown in Figure 5 or Figure 6, grasp the power supply handles and carefully insert the new power supply A into the power supply bay.
10. Slowly press the power supply into the system. The power-supply-handle tabs will snap into place, which indicates that the power supply is seated correctly and locked into position B.
    Figure 5. Install a power supply in a rack-mounted system unit

    
    Figure 6. Install a power supply in a stand-alone system unit

    
    Tip: You might need to press down firmly on the power supply after the handles lock into place to assure it is completely seated.
11. If you are installing a second power supply feature, plug the second power cable into the back of the new power supply. If you have just replaced a power supply, reconnect the power cable to the new power supply by routing it through the ring, if provided, before you plug it into the back of the server. For an example, see Figure 2 in Replace the model 9116-561 or 570 power supply with power on.
12. Connect the power source to the system.
13. Note the state of the light-emitting diodes (LEDs) on the power supply. For more information, read Power supply LEDs. If the LEDs indicate that the power supply is operating normally, that is both of the green LEDs are on solid (not blinking), continue to the next step. If not, remove the power supply from the system and repeat the procedure starting with step 9. If, after repeating the procedure, the power supply is not operating normally, contact your service provider.
14. Replace the service access cover. For instructions, see Install the service access cover on the model 285, 51x, 52x, 55x, 710, or OpenPower 720.
15. If you are working on a rack-mounted system unit, ensure that the system cables are routed correctly through the cable-management arm.
    Figure 7. Cables routed through the cable-management arm

    
16. If you have a rack-mounted system unit, place the rack-mounted system or expansion unit in the operating position. Refer to Place the rack-mounted system or expansion unit in the operating position.
17. Reconnect the cables at the back of the system.
18. On a rack-mounted system unit, close the back rack door.