Dell PowerEdge 1800 - Manual (Page 5)

Power Supply Upgrade Installation Guide
3
To upgrade your system from a single power supply, nonredundant configuration to a redundant
configuration with two power supplies, you must first remove the nonredundant power supply and
install a power distribution board (PDB) and two hot-plug power supplies.
Removing the Nonredundant Power Supply
CAUTION:
Only trained service technicians are authorized to remove the system cover and access any
of the components inside the system. Before performing any procedure, see your Product Information
Guide for complete information about safety precautions, working inside the computer and protecting
against electrostatic discharge.
1 Turn off the system, including any attached peripherals, and disconnect the system from the
electrical outlet.
2 Remove the bezel.
3 Open the system:
a Loosen the three captive screws at the front edge of the left-side cover.
b Grasp the cover at both ends and slide it toward the front of the system.
c Lift the cover away from the system.
4 If your system is configured as a tower system, lay it on its right side.
5 Remove the baffle/back fan assembly. See Figure 1-1.
a Press the release tab at the front of the assembly and the release tab at the back of the
assembly.
b Slightly lift up the baffle/back fan assembly and disconnect the back fan assembly cable
from the system board.
c Lift the baffle/back fan assembly out of the chassis.