Table 10. Lower processor board (MB) connectors (continued)
13 M.2 signal connector 27 UPI1_L connector
14 M.2 power connector
Lower processor board (MB) switches
The following illustrations show the location of the switches on the lower processor board (MB).
Important:
1. Before you change any switch settings or move any jumpers, turn off the server; then, disconnect all
power cords and external cables. Review the following information:
•
https://pubs.lenovo.com/safety_documentation/
• “Installation Guidelines”, “Handling static sensitive devices”, and “Power off the server” in User Guide
or Hardware Maintenance Guide.
2. Any lower processor board (MB) switch or jumper block that is not shown in the illustrations in this
document are reserved.
Note: If there is a clear protective sticker on the top of the switch blocks, you must remove and discard it to
access the switches.
Chapter 2. Server components 25
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