Lenovo ThinkCentre M73, User Manual

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12. Install the screw that secures the optical drive box on the VESA mount bracket.
Figure 34. Installing the screw that secures the optical drive box
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 9.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 80.
Installing or removing the I/O box
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 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. Turn off the computer and disconnect all power cords from electrical outlets.
2. Disconnect the I/O box cable from the USB connector on the computer.
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ThinkCentre M73 User Guide