HP AB464-9003F Service Manual page 250

Figure 86 Midplane Board Screw Location (Rear of Chassis)
22. Use a Torx 10 screwdriver to remove the four Torx screws attaching the midplane board to
the sheet metal bracket through the rear of the chassis
Figure 87 Midplane Board Screw Location (Front of Chassis)
23. Grasp the top edge of the midplane board and lift straight up to release it from the guide
pins on the chassis; and pull straight out and up to remove the midplane board from the
chassis.
250 Removing and Replacing Server Components
(Figure 87).