Lenovo ThinsStation P320 Hardware Maintenance Manual page 40

Note: Depending on the model, some of the following components might not be available.
Figure 4. Major FRUs and CRUs
The following table lists the major FRUs shown in Figure 4 "Major FRUs and CRUs" on page 32 and identifies
which FRUs are also self-service CRUs or optional-service CRUs.
Notes:
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P320 Hardware Maintenance Manual