Sun Microsystems Fire V890 Service Manual page 187

4. Loosen the two captive Phillips screws securing the power supply to the system
rear panel.
5. Pull the power supply out from its bay.
Use one hand to pull the power supply out while using the other hand to support
the power supply as it is removed from the system.
Note – When hot-swapping a power supply, do not disengage and reengage the
supply in rapid succession. Rapid seating and unseating of a power supply will
result in false error conditions. After removing a supply, wait for an
acknowledgement message on the system console before installing a new supply;
otherwise, the environmental monitoring software will not recognize the new device
and false error conditions will result.
Chapter 5 Removing and Installing Miscellaneous Assemblies 159