Installing Or Removing The I/O Box - Lenovo 10A4 Hardware Maintenance Manual

13. Connect the secondary hard disk drive cable to a USB connector on the computer. See "Locating
connectors on the rear of your computer" on page 86.

Installing or removing the I/O box

Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Safety information" on page 1.
This section provides instructions on how to install or remove the I/O box.
Note: The I/O box is only available on some models.
The I/O box provides the following connectors for connecting to external devices:
• Four USB 2.0 connectors (two on the front and two on the rear)
• One serial port
• Two PS/2 connectors (one for keyboard and one for mouse)
To remove the I/O box, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Disconnect the I/O box cable from the USB connector on the computer.
3. Remove the screw that secures the I/O box on the VESA mount bracket and then slide the I/O box as
shown to remove it from the VESA mount bracket.
Figure 252. Removing the I/O box
To install the I/O box, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Align the two holes in the I/O box with the two screws on the VESA mount bracket and then slide the I/O
box as shown to install it on the VESA mount bracket.
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ThinkCentre M83 and M93/p Hardware Maintenance Manual