Note: There no need to remove the PHMs or DIMMs installed in the processor and memory
expansion tray before removing the expansion tray.
Step 6. Disconnect all cables from the system board. Make a list of each cable as you disconnect it and
use it as a checklist after installing the new system board.
Step 7. Remove all the DIMMs from the system board, and set them aside on a static-protective surface for
reinstallation (see “Remove a memory module” on page 89).
Note: Make a note of the location of all the installed DIMMs for later reference. Refer to
ThinkSystem SR860 Memory Population Reference if you’re adding more DIMMs.
Step 8. Remove the PCIe riser card if it has been installed (see “Remove the PCIe riser card assembly” on
page 97).
Step 9. Remove the LOM adapter if it has been installed (see “Remove the LOM adapter” on page 80).
Step 10. Remove all the other adapters installed on the system board (see “Remove an adapter” on page
102).
Step 11. Disconnect the USB 3.0 cable of operator panel tray assembly and remove it vertically from the
system board.
Figure 129. Disconnecting USB 3.0 vertically
Step 12. Remove all the PHMs installed on the system board (see “Install a processor and heat sink” on
page 116).
Step 13. Remove the drive backplanes and cables connected to the system board (see “Remove a drive
backplane” on page 61).
Step 14. If there is an installed TCM module, remove it (see “Remove the TCM/TPM adapter (for China only)”
on page 143).
Step 15. Grasp the system board handle and thumbnail, and slide the system board toward the front of the
server.
Chapter 3. Hardware replacement procedures 133
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