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IBM PC Server/Enterprise rack enclosures 3
• Yes: Power-off the server rack and replace the server rack components in the
following order until the problem goes away. See “Powering off the rack” on
page 3.
a. Power distribution unit fuse.
b. Power distribution unit.
Powering off the rack
Before performing service on the rack, follow this procedure to prevent personal
injury and to avoid damaging the rack and the installed servers.
To power-off the IBM PC Server Rack:
1. Shut down and power-off all installed servers.
2. Power-off the server selector unit.
3. If a UPS system is installed in the rack, power-off the UPS system.
4. Disconnect power from the IBM PC Server Rack.
• If the rack is plugged into a wall-mounted power supply, disconnect the
power cord plug from the wall socket.
• If the power cord is wired directly into the installed location's power supply,
open the rear door of the rack cabinet and disconnect the power plug from the
base of the power distribution unit.