Replacing an 8203-E4A, 8204-E8A, 9407-M15, 9408-M25, or 9409-M50 power supply with power on

Learn how to install a second power supply or replace a redundant power supply because of a failure with the system power on.

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

To replace a power supply in a system that is not managed by an HMC while the system power is on, complete the following steps.
Important: You must have a functioning power supply in the system to use the following steps.
  1. If you are replacing a redundant power supply because of a failure, remove the failing power supply. For instructions see Removing an 8203-E4A, 8204-E8A, 9407-M15, 9408-M25, or 9409-M50 power supply with power on.
  2. Complete the prerequisite tasks described in Before you begin.
  3. Attach the wrist strap.
    Attention:
    • Attach a wrist strap to an unpainted metal surface of your hardware to prevent electrostatic discharge (ESD) from damaging your hardware.
    • When using a wrist strap, follow all electrical safety procedures. A wrist strap is for static control. It does not increase or decrease your risk of receiving electric shock when using or working on electrical equipment.
    • If you do not have a wrist strap, just prior to removing the product from ESD packaging and installing or replacing hardware, touch an unpainted metal surface of the system for a minimum of 5 seconds.
  4. Push the power supply (A) into place until the locking latch snaps into place as shown in Figure 1.
    Figure 1. Replacing a power supply
    Graphic showing power-supply replacement
  5. Reconnect the power cable (B) to the front of the power supply.
  6. Replace the front cover, as described in Installing the front cover on a rack-mounted model or Installing the front cover on a stand-alone model.
  7. Close the front rack door.