Hi,
Before replacing an LPU, you need to note the following points:
Before replacing an LPU, prepare a same LPU. The interfaces on the prepared LPU should have the same numbers as the LPU to be replaced.
When replacing boards in the rear board insertion area of the NE40E-X16 device, note that the installation direction of boards in the rear board insertion area is opposite to the installation direction of boards in the frontal board cage.
For detailed procedure, pleaser refer to: https://support.huawei.com/hedex/hdx.do?docid=EDOC1100168821&id=EN-US_TASK_0172339738&lang=en