Dell POWEREDGE R710 - Manual (Page 126)

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Installing System Components
1 Turn off the system, including any attached peripherals, and disconnect
the system from the electrical outlet.
2 Open the system. See Opening the System.
3 Disconnect all cables connected to the expansion card.
4 Remove any expansion cards from the expansion-card riser. See "Removing
an Expansion Card."
5 Press the blue release latch on expansion-card riser 2 and lift the riser
straight up to clear the chassis. See Figure 3-28.
Replacing Expansion-Card Riser 2
1 Align the guides on each end of expansion-card riser 2 with the mounting
pins on the system board, and lower the riser into the system until the
latches on the riser the engage. See Figure 3-28.
2 Reinstall any expansion cards. See "Installing an Expansion Card."
3 Reconnect all expansion-card cables.
4 Close the system. See "Closing the System."
5 Reconnect your system and peripherals to their electrical outlets, and turn
on the system.