Lenovo ThinkStation 4215, Hardware Maintenance Manual, Page: 94 / 180

CAUTION:
Turn off the computer and wait three to five minutes to let the computer cool
before removing the computer cover.
To remove the computer cover, do the following:
1. Remove any media from the drives and turn off all attached devices and the
computer.
2. Disconnect all power cords from electrical outlets.
3. Disconnect the power cords, Input/Output (I/O) cables, and any other cables
that are connected to the computer. See “Locating connectors on the front of
your computer” on page 83 and “Locating connectors on the rear of your
computer” on page 84.
4.
Remove any locking device that secures the computer cover, such as a padlock
or an integrated cable lock.
5. Remove any thumbscrews that secure the computer cover.
6. Press the cover-release button on the side of the computer and slide the cover
to the rear of the computer to remove the cover.
Figure 6. Removing the computer cover
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Hardware Maintenance Manual