System-Board Switches, Jumpers, And Buttons - Lenovo System x3550 M4 Installation And Service Manual

Figure 16. System-board external connectors

System-board switches, jumpers, and buttons

The following illustration shows the location of the switches, jumpers, and buttons on the server.
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 information in "Safety" on page v, "Installation guidelines"
on page 31, "Handling static-sensitive devices" on page 33, and "Turning off the server" on page 21.
2. Any system-board switch or jumper block that is not shown in the illustrations in this document are
reserved.
3. If there is a clear protective sticker on the top of the switch blocks, you must remove and discard it to
access the switches.
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Chapter 2 Installing optional devices
27