IBM System x3650 M4 BD Type 5466 Installation And Service Manual page 270

Figure 181. System board removal
16. Grasp the system board by the holders; then, carefully lift up the system
Figure 182. System board removal
17. Remove the socket dust covers from the microprocessor sockets on the new
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System x3650 M4 BD Type 5466: Installation and Service Guide
board and remove it from the chassis, being careful not to damage any
surrounding components.
system board and place them on the microprocessor sockets of the old system
board that you are removing.