Lenovo 3057 Maintenance Manual page 172

Note: To clearly show the backplane, the system fans are omitted from the illustrations in this topic.
To replace the backplane for server models with eight 3.5-inch hard disk drive bays, do the following:
1. Remove all media from the drives and turn off all attached devices and the server. Then, disconnect all
power cords from electrical outlets and disconnect all cables that are connected to the server.
2. If the server is installed in a rack cabinet, remove the server from the rack cabinet and place it on a flat,
clean, and static-protective surface. See the Rack Installation Instructions that comes with the server.
3. Remove the server cover. See "Removing the server cover" on page 85.
4. Locate the backplane. See "Components of server models with eight 3.5-inch hard disk drive bays"
on page 32.
5. Remove all the installed 3.5-inch hot-swap hard disk drives and dummy trays (if any) from the hard disk
drive bays. See "Installing or replacing a hot-swap hard disk drive" on page 150.
6. Record the cable connections on the backplane and then disconnect all cables from the backplane.
7. Press each of the two latches on the chassis in the direction as shown until the latch snaps into the
open position and will not interfere with lifting up the backplane.
Figure 116. Releasing the backplane for server models with eight 3.5-inch hard disk drive bays
8. Carefully lift the backplane straight up a little bit so that the small hooks
with the corresponding holes in the backplane. Then, slowly and carefully move the backplane to the
rear of the chassis until the hooks
remove the backplane out of the chassis.
Figure 117. Removing the backplane for server models with eight 3.5-inch hard disk drive bays
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ThinkServer RD430 Hardware Maintenance Manual
1 pass through the holes in the backplane and then completely
1 on the chassis are aligned