HP Vectra VLi8 Supplementary Manual page 31

5 First ensure the lever is open, then carefully slide in the new system
board, aligning the rails and the rear connector bracket correctly.
6 Pushing on the lever and on the system board edge, slide the system
board firmly into place. Ensure the connectors are well aligned and
fully engaged.
7 Replace the main memory and processor in the new system board
(described in this chapter).
8 Replace the lower bracket.
9 Replace the cover (described in this chapter).
2 How to Install and Replace Components In Your Desktop PC
Replacing the System Board
73