Lenovo ThinkServer RD120, Hardware Maintenance Manual

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12. Reconnect the external cables; then, reconnect the power cords and turn on
the peripheral devices and the server.
Attention: In a dc power environment, only trained service personnel other
than Lenovo service technicians are authorized to connect or disconnect power
to the dc power supply. See the documentation that comes with each dc power
supply.
Important: Either update the server with the latest SAS firmware or restore the
pre-existing firmware from a diskette or CD image.
Removing the 3.5-inch center bracket
This procedure applies to 3.5-inch model servers only. If the center bracket between
the two columns of 3.5-inch hard disk drives becomes damaged, you can replace it.
To remove the center bracket, complete the following steps.
1
3.5-inch cage divider
1. Read the safety information that begins on page vii and “Installation guidelines”
on page 53.
2. Turn off the server and peripheral devices, and disconnect the power cord and
all external cables.
Attention: In a dc power environment, only trained service personnel other
than Lenovo service technicians are authorized to connect or disconnect power
to the dc power supply. See the documentation that comes with each dc power
supply.
3. Remove the server from the rack and place it on a flat, static-protective surface.
4. Remove the cover (see “Removing the cover” on page 56).
5. Remove the fan-bracket assembly (see “Removing the fan-bracket assembly”
on page 60).
6. Remove the hard disk drive backplane (see “Removing the 3.5-inch-drive hard
disk drive backplane” on page 108).
Chapter 4. Removing and replacing server components
123