Remove the system I/O board and interposer board

Follow instructions in this section to remove the system I/O board and interposer 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.

Important

• This task must be operated by trained technicians that are certified by Lenovo Service. Do not attempt to remove or install the part without proper training and qualification.

• 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 I/O board and interposer board.

Attention

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

• Power off the server and peripheral devices, disconnect the power cords from the primary chassis, then disconnect the power cords from the secondary chassis. 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.

• If the server is installed in a rack, remove the server from the rack. See Remove the server from rails.

Important

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 I/O board and interposer board.

Procedure

1. Make preparation for the 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. Remove the front top cover. See Remove the front top cover.
   5. Remove the upper processor board (CPU BD) air baffle. See Remove the upper processor board (CPU BD) air baffle.
   6. Remove the upper processor board (CPU BD). See Remove the upper processor board (CPU BD).
   7. For primary chassis only, remove the support bracket. See Remove the support bracket.
2. Disconnect the SCM cable.
   Figure 1. Disconnecting SCM cable
   

   

   
   
   1. Remove the two screws that secure the SCM cable.
   2. Disconnect the SCM cable from the interposer board.
3. If necessary, make a list of each remaining cable and record the connectors the cable is connected to; then, disconnect and remove all the remaining cables on the interposer board and system I/O board.
4. Remove the two screws on the front of the chassis.
   Figure 2. Loosening system I/O board and interposer assembly

   
   
   
5. Slide the system I/O board and interposer assembly towards the rear of the chassis to remove it.
   Figure 3. Removing system I/O board and interposer assembly

   
   
   
6. (Optional) If you are going to replace the system I/O board, remove the Firmware and RoT Security Module from the system I/O board. See Remove the Firmware and RoT Security Module. If you are going to replace the lower processor board (MB), go to next step directly.
7. Remove the interposer board.
   Figure 4. Removing interposer board
   

   

   
   
   1. Remove the screw that secure the interposer board.
   2. Hold the interposer board by its edges and slide it away from the system I/O board to remove it.
8. Remove the system I/O board from the bracket.
   Note

   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 5. Removing system I/O board from bracket
   

   

   
   
   1. Remove the four screws that secure the system I/O board.
   2. Lift and hold the plunger; then, slide the system I/O board away from the bracket to remove t.