IBM Power System 8247-42L Manual page 95

Figure 76. Installing the backplane
d. Using a Phillips screwdriver, install and tighten 10 black screws (A) that mount the backplane to
the base of the chassis. See Figure 77 on page 78.
e. Using a Phillips screwdriver, install and tighten two silver screws (B) as is shown in Figure 76
and Figure 77 on page 78.
77
System backplane