Remove the system board (Trained technician only)

Procedure

1. Make preparations for this task.
   1. Record all system configuration information, such as Lenovo XClarity Controller IP addresses, vital product data, and the machine type, model number, serial number, Universally Unique Identifier, and asset tag of the server.
   2. Save the system configuration to an external device with Lenovo XClarity Essentials.
   3. Save the system event log to external media.
   4. Power off the node (see Power off the node); then, disconnect all external cables from the node.
   5. Remove the node from the chassis (see Remove a node from the chassis); then, carefully lay the node on a flat, static-protective surface, orienting the node with the front toward you.
      Note

      • When removing the node, note the node tray number and make sure to install the node in the same tray from which it was removed. Reinstalling the node into a different tray requires the node to be reconfigured.
      • For safety, make sure to hold the node with both hands when lifting the node.
   6. Remove the top cover (see Remove the top cover).
   7. Disconnect all the cables from the drive backplane; then, remove the drive cage assembly from the node and place it on a flat, static-protective surface (see Remove the drive cage assembly).
   8. Remove the firmware and RoT security module (see Remove the firmware and RoT security module).
   9. Remove all the installed processor and heat sink modules (see Remove the processor and heat sink).
   10. Make sure to label the slot number on each memory module; then, remove all the memory modules from the system board and set them aside on a static-protective surface for reinstallation (see Remove a memory module).
       Important

       It is advised to print out the layout of memory module slots for reference.
   11. If necessary, remove the M.2 drives (see Remove an M.2 drive).
   12. Remove the microSD card (see Remove the MicroSD card).
   13. If the GPU air duct is installed in the node, remove it (see Remove the GPU air duct).
   14. If the PCIe riser assembly is installed, remove it from the node and disconnect the PCIe cables from the system board (see Remove the PCIe riser assembly and Internal cable routing).
   15. Remove the power bus bar (see Remove the power bus bar).
   16. Disconnect the power distribution board cables from the system board; then, remove the power distribution board (see Remove the power distribution board).
   17. If the rear OCP and rear I/O module cables are connected to the system board, remove them (see Rear I/O and OCP module cable routing).
2. Remove the heat sink support bracket.
   1. Loosen the two screws that secure the support bracket.
   2. Hold the support bracket and remove it from the system board.
   Figure 1. Heat sink support bracket replacement
   
   
3. 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.
4. Remove all the installed cable ducts.
   1. Disengage the clips of the cable ducts from the node.
   2. Lift the cable ducts out of the node.
   Figure 2. Cable duct replacement (one processor configuration)
   
   

   Figure 3. Cable duct replacement (two processor configuration)
   
   
5. Remove the system-board screws from the front of the node.
   Figure 4. Removal of the screws
   
   
6. Remove all the screws from the system board.
   Important

   When removing the system board from the node, avoid touching the connectors on the system board. Do not damage any surrounding components inside the node.
   Figure 5. Removal of the screws
   
   
7. Remove the system board from the node.
   1. Carefully tilt and hold the rear edge of the system board; then, pivot the system board at an angle to disengage it.
   2. Gently slide the system board toward the rear of the node; then, carefully lift the system board out of the node.
   Figure 6. Removal of the system board