Parts list
Use the parts list to identify each of the components that are available for your server.
Note: Depending on the model, your server might look slightly different from the illustration.
For more information about ordering parts: 
1.  Go to 
http://datacentersupport.lenovo.com and navigate to the support page for your server.
2.  Click Parts.
3.  Enter the serial number to view a listing of parts for your server.
Figure 28. Server components
The parts listed in the following table are identified as one of the following: 
•  Tier 1 customer replaceable unit (CRU): Replacement of Tier 1 CRUs is your responsibility. If Lenovo 
installs a Tier 1 CRU at your request with no service agreement, you will be charged for the installation. 
•  Tier 2 customer replaceable unit (CRU): You may install a Tier 2 CRU yourself or request Lenovo to 
install it, at no additional charge, under the type of warranty service that is designated for your server.
36 ThinkSystem ST50 V2 Maintenance Manual