2.  Turn off the server and peripheral devices and disconnect the power cords and all external cables (see 
“Power off the server” on page 132).
3.  If the server is installed in a rack, remove the server from the rack.
4.  Remove the top cover (see 
“Remove the top cover” on page 89).
To remove a 4U PCIe riser assembly, complete the following steps:
Watch the procedure 
A video of this procedure is available at YouTube: 
https://www.youtube.com/watch?v=pIb0bIyfkDY&= 
PLYV5R7hVcs-Ak9fT8QAx8fLbEivizjRtp
.
Figure 54. 4U PCIe riser assembly removal
Table 75.  4U PCIe riser assembly filler
1  4U PCIe riser assembly filler
Step 1.  Open the release latch.
Step 2.  Rotate the lever to disengage the 4U PCIe riser assembly from the slot.
Step 3.  Lift the 4U PCIe riser assembly out of the PCIe expansion tray. 
Chapter 3. Server hardware setup 91