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Remove the system I/O board or processor board

Follow instructions in this section to remove the system I/O board or processor board.

About this task

  • This task must be operated by trained technicians that are certified by Lenovo Service. Do no attempt to remove or install it without proper training and qualification.

  • When replacing the system board assembly, always update the server with the latest firmware or restore the pre-existing firmware. Make sure that you have the latest firmware or a copy of the pre-existing firmware before you proceed.

  • When removing the memory modules, label the slot number on each memory module, remove all the memory modules from the system board assembly, and set them aside on a static-protective surface for reinstallation.

  • When disconnecting cables, make a list of each cable and record the connectors the cable is connected to, and use the record as a cabling checklist after installing the new system board assembly.

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

  • Power off the server and peripheral devices and disconnect the power cords and all external cables. See Power off the server.

  • 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.

Hazardous moving parts. Keep fingers and other body parts away.
This label indicates hazardous moving parts nearby and warns users and servicers to keep fingers and other body parts away.

Attention/Caution/Danger icon, warning users and servicers of a hot surface nearby
The heat sinks and processors might be very hot. Turn off the server and wait several minutes to let the server cool before removing the server cover.
disconnect all power
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.


  1. Make preparation 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 server and peripheral devices and disconnect the power cords and all external cables. See Power off the server.
    5. If the server is installed in a rack, slide the server out on its rack slide rails to gain access to the top cover, or remove the server from the rack. See Remove the server from rack.
    6. Remove the top cover. See Remove the top cover.
    7. If your server comes with an air baffle, a middle cage, or a rear cage, remove it first.
    8. If your server has a CFF adapter or a RAID flash power module installed on the front of the chassis, remove it first.
    9. Record where the cables are connected to the system board assembly; then, disconnect all the cables.
    10. Remove any of the following components that are installed on the system board assembly and put them in a safe, static-protective place.
    11. Pull out the power supplies slightly. Ensure that they are disconnected from the system board assembly.
  2. Remove the system board assembly.
    Figure 1. System board assembly removal
    System board assembly removal

    1. Lift the two lifting handles at the same time.
    2. Slide the system board assembly towards the front of the chassis until it stops.
    3. Tilt and lift the system board assembly out of the chassis.
  3. Separate the system I/O board from the processor board.
    To prevent the contact of the system I/O board from damage, pinch and lift the plunger on the system I/O board upward a little and pull out the system I/O board outward. During the entire pulling action, ensure that the system I/O board remains as horizontal as possible.
    Figure 2. Separating the system I/O board from the processor board
    Separating the system I/O board from the processor board

    1. Remove the screws that secure the system I/O board.
    2. Lift and hold the rear lifting handle and slide the system I/O board towards the rear to disengage it from the processor board.
  4. (Optional) If you are going to replace the system I/O board, do the following:
    1. Remove the firmware and RoT security module from the system I/O board. See Remove the firmware and RoT security module.

    2. Remove the MicroSD card. See Remove the MicroSD card.

After you finish

  • If you are instructed to return the component or optional device, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you.

    Before you return the processor board, make sure that you install the processor socket covers from the new processor board. To replace a processor socket cover:
    1. Take a socket cover from the processor socket assembly on the new processor board and orient it correctly above the processor socket assembly on the removed processor board.

    2. Gently press down the socket cover legs to the processor socket assembly, pressing on the edges to avoid damage to the socket pins. You might hear a click on the socket cover is securely attached.

    3. Make sure that the socket cover is securely attached to the processor socket assembly.

  • If you plan to recycle the component, see Disassemble the system board assembly for recycle.

Demo video

Watch the procedure on YouTube