Lenovo ThinkSystem SD550 V3 User Manual page 202

q. If the GPU air duct is installed in the node, remove it (see
119).
r. Disconnect all the fan cables from the system board; then, remove the fan cage from the node
(see "Remove the fan cage" on page
s. If the PCIe riser assembly is installed, remove it from the node and disconnect the PCIe cables
from the system board (see
cable routing" on page
t. Remove the power bus bar (see
u. Depending on the specific configuration, remove one or both side brackets from the node (see
"Remove a side bracket" on page
• If no cable duct is installed, remove the left (the side with the ruler label) side bracket.
• If cable ducts are installed, remove both side brackets from the node; then, remove both
cable ducts.
Step 2. Disconnect all the cables from the system board. When disconnecting the cables, make a list of
each cable and record the connectors the cables are connected to, and use the record as a cabling
checklist after installing the new system board.
Step 3. Remove all the installed cable ducts.
a. Disengage the clips of the cable ducts from the node.
b. Lift the cable ducts out of the node.
Figure 124. Cable duct replacement
Step 4. Remove the system-board screws from the front of the node.
ThinkSystem SD550 V3 User Guide
192
104).
"Remove the PCIe riser assembly" on page 146
223).
"Remove the power bus bar" on page
183).
"Remove the GPU air duct" on page
and "PCIe riser
156).