Lenovo IdeaCentre B750 All-in-One - Manual (Page 39)

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User Guide
Removing the stand base
Attention: Turn off the computer and wait 3 to 5 minutes to let it cool
down before removing the cover.
Note: It may be helpful to place the computer face-down on a soft flat
surface for this procedure. Lenovo recommends that you use a blanket,
towel, or other soft cloth to protect the screen from scratches or other
damage.
1. Remove any media (disks, CDs, or memory cards) from the drives, shut down
the operating system, and turn off the computer and all attached devices.
2. Unplug all power cords from electrical outlets.
3. Disconnect all cables attached to the computer. This includes power cords,
input/output (I/O) cables, and any other cables that are connected to the
computer. Refer to “Left and right views” and “Rear view” for help with locating
the various connectors.
4. To release the stand base from the stand holder, twist the hand screw rings
counter-clockwise until the base comes loose.
5. Slide the stand base out from the holder then put it aside.
6. Refer to “Installing the computer stand” to reinstall the stand base.