Fujitsu PRIMERGY RX4770 M5 Upgrade And Maintenance Manual page 83

Figure 36: Securing the top system board (B)
▶ Push the locking lever to the left (1).
▶ Pull up the lever (2).
▶ Press the thumb on the green knob and pull up the handle (2), see
Figure 37.
Control with a mirror that the top system board is completely engaged.
The holes on the top system board connectors should not be visible
(see Figure
RX4770 M5
38).
Upgrade and Maintenance Manual
Basic hardware procedures
83