IBM Power System 8247-42L Manual page 118

Figure 101. Replacing the USB cable cover
28. Replace the memory modules. For instructions, see Replacing a memory module
(http://www.ibm.com/support/knowledgecenter/POWER8/p8han/p8han_82x_84x_memoryin.htm).
29. Replace the VPD card. For instructions, see Replacing the vital product data card
(http://www.ibm.com/support/knowledgecenter/POWER8/p8edf/p8edf_82x_84x_vpdin.htm).
30. Replace the time-of-day battery. For instructions, see Replacing the time-of-day battery
(http://www.ibm.com/support/knowledgecenter/POWER8/p8eg4/
p8eg4_82x_84x_replacetodbattery.htm).
31. Align the disk drive backplane with its corresponding connectors inside the system.
32. Using the ledge at the top of the disk drive backplane and facing towards the front of the system,
replace the backplane. Tilt it towards the rear and lower it down into the chassis. Align the
backplane cutouts with the tabs in the chassis to insert it into the system. Slide the backplane to the
side as is shown in Figure 102 on page 101.
33. Carefully tighten the captive thumbscrews (A) until each one is secured to the system's chassis.
100
System backplane