Lenovo ThinkSystem SD550 V3 User Manual page 80

remove all electrical current from the device, ensure that all power cords are disconnected from the
power source.
Attention:
• Read "Installation Guidelines" on page 43
you work safely.
• Power off all the nodes in the chassis; then, disconnect all the power cords from the installed power
supply units.
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.
e. Remove the PSU cage from the chassis (see
carefully lay the PSU cage on a flat, static-protective surface, orienting the midplane upward.
Step 2. Loosen the six screws that secure the chassis midplane to the PSU cage.
Step 3. Lift the chassis midplane away from the PSU cage.
ThinkSystem SD550 V3 User Guide
70
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
"Remove the PSU cage" on page
to make sure that
53); then, disconnect all external
"Remove a hot-swap
66); then,
75).
54); then,