Lenovo 4223 Personal Computer User Manual


 
Removing the computer cover
Attention: Do not open your computer or attempt any repair before reading and understanding the “Important
safety information” on page v.
This section provides instructions on how to remove the computer cover.
CAUTION:
Turn off the computer and wait three to ve 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 cables, and any other cables that are connected to the
computer. See “Locating connectors, controls, and indicators on the front of your computer” on page 6
and “Locating connectors on the rear of your computer” on page 8.
4. Remove any locking device that secures the computer cover, such as a padlock or an integrated cable
lock. See “Locking the computer cover” on page 23 and “Attaching an integrated cable lock” on page 26.
5. Disengage the cover latch 1 and remove the cover. Place the cover on a at surface.
Figure 10. Removing the computer cover
30 ThinkStation User Guide