Remove the power distribution board

Follow the instructions in this section to remove a power distribution board.

About this task

S002

CAUTION

The power-control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

Attention

• Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.

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. Power off the server and disconnect all power cords for this task. See Power off the server.
   4. Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static-sensitive components in their static-protective packages until installation, and handling these devices with an electrostatic-discharge wrist strap or other grounding system.
   5. Remove the redundant power supply unit. See Remove a power supply unit.
   6. If the server is in a rack, remove it from the rack.
   7. If foot stands are installed on the server, pivot them inwards and lay the server on its side for easier operation.
   8. Remove the server cover. See Remove the server cover.
   9. If necessary, remove all flash power modules. See Remove a flash power module.
   10. Remove the air baffle. See Remove the air baffle.
   11. Disconnect cables for PCIe adapter or full-length GPU adapter.
   12. Remove all the full-length GPU adapters, if any. See Remove a FL GPU adapter.
   13. If necessary, remove the A2/L4 GPU air duct(s) or FL PCIe adapter holder(s) installed on the fan cage. See Remove an A2/L4 GPU air duct or Remove a FL PCIe adapter holder.
   14. Remove all the fan modules and fan filler. See Remove a fan module.
       Attention

       All fan modules must be removed from the fan cage when handling the fan cage assembly.
   15. Remove the fan cage assembly. See Remove the fan cage assembly.
   16. Remove the internal CFF HBA/RAID adapter. See Remove an internal CFF adapter.
   17. Remove the RoT module. See Remove the Firmware and RoT Security Module.
   18. Remove all the PCIe adapters, if any. See Remove a HL PCIe adapter.
   19. Disconnect the intrusion switch cable from the system board, or remove the intrusion switch, if necessary. See Remove the intrusion switch.
   20. If necessary, remove the CMOS battery. See Remove the CMOS battery (CR2032).
   21. If necessary, remove the MicroSD card. See Remove the MicroSD card.
   22. 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.. See Remove a memory module.
   23. Remove the processor and the heat sink. See Remove a processor and heat sink (trained technician only).
   24. Make note of where the cables are connected to the system board; then, disconnect all the cables.
       Note

       Disengage all latches, cable clips, release tabs, or locks on cable connectors beforehand. Failing to release them before removing the cables will damage the cable connectors on the system board. Any damage to the cable connectors may require replacing the system board.
   25. Remove the system board. See Remove the system board (trained technician only).
   26. Remove the power distribution board cover. See Remove the power distribution board cover.
2. Disconnect all the cables from the power distribution board.
3. Remove the power distribution board.
   1. Remove the three screws that secure the power distribution board to the chassis.
   2. Slide the power distribution board towards the rear of the server to release it from the chassis; then, carefully hold edges of the power distribution board and lift it out of the chassis.
      Figure 1. Removal of the power distribution board