Remove the model 55x or 720 power supply

Learn how to remove a power supply with the system power off to replace a failing unit or as a part of another service action. Use the procedure in this section to accomplish this task.

If your system is managed by the Hardware Management Console (HMC), use the HMC to complete the steps for removing a power supply. For instructions, see Remove a part using the Hardware Management Console.

Note: If you are removing a redundant power supply, and are not going to replace that power supply, you will need to place a power supply filler into the empty bay for proper airflow and electromagnetic compatibility (EMC) shielding.

To remove a power supply while the system power is off, complete the following steps:

Perform the prerequisite tasks described in Before you begin.
If you are removing the power supply as part of another procedure, continue to the next step. If you are removing the power supply because it is not operational, identify the power supply that needs to be replaced. For instructions, see Identify a failing part.
If the system is running, Stop the system or logical partition.
On a rack-mounted system unit, open the back rack door.
Disconnect the power cable from the back of the power supply that you want to remove.
Note: This system might be equipped with a second power supply. Before continuing with this procedure, ensure that all power sources to the system have been completely disconnected.
If you are servicing a rack-mounted system unit, place the rack-mounted system or expansion unit in the service position. For instructions, see Place the rack-mounted system or expansion unit in the service position.
Remove the service access cover, see Remove the service access cover from the model 285, 51x, 52x, 55x, 710, or OpenPower 720.
Wait at least 10 seconds before performing the next step.
As shown in Figure 1 or Figure 2, squeeze the tabs on the power supply handles A and then slowly rotate the handles to release the power supply or filler from the system B.
After the power supply is released, use the power supply handles to pull the power supply out of the system C.
Figure 1. Remove a power supply from rack-mounted system unit

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