Lenovo ThinkSystem SD550 V3 User Manual page 78

• Read "Installation Guidelines" on page 43
you work safely.
Procedure
Step 1. Make preparations for this task.
a. Power off all the nodes (see
cables from the nodes.
Note: If necessary, press the release clip with a flat-head screwdriver to remove an external
network cable from the rear of a 2U node.
b. Remove all the nodes from the chassis (see
c. Remove all power supply units and PSU fillers from the PSU cage (see
power supply" on page 61
d. Remove the chassis from the rack (see
lay the chassis on a flat, static-protective surface.
Step 2. Remove the PSU cage from the chassis.
a. Loosen the thumbscrew located on the top of the chassis.
b. Hold the vertical partitions between the PSU slots; then, pull the PSU cage out of the chassis.
ThinkSystem SD550 V3 User Guide
68
and "Safety inspection checklist" on page 44
"Power off the node" on page
"Remove a node from the chassis" on page
and Removal of a PSU filler).
"Remove the chassis from the rack" on page
to make sure that
53); then, disconnect all external
"Remove a hot-swap
75).
54); then,