HP d640 Installation And User Manual page 16

Step 4 Remove the right screw in the upper cover. See Figure 12.
Right
screw
Figure 12 Removing right screw in upper cover
Step 5 Insert spacer bolt (A) into the hole where the screw was. See
Spacer bolts are labeled A, B, and C. Make sure you use the correct
bolt (A).
Spacer
bolt (A)
Figure 13 Inserting spacer bolt (A)
12 Chapter 1: Introduction
Figure 13.