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Basic connections
The system unit, PS/2 keyboard, PS/2 mouse, and monitor constitute the basic system. Before connecting any other peripherals, connect these peripherals first to test if the system is running properly.
Connecting the PS/2 keyboard
Plug the PS/2 keyboard cable into the PS/2 keyboard port 
(purple port) located on the rear panel of your system.
Note: If you are using a USB keyboard, plug the keyboard cable into either of the USB ports located on the front panel of your system.
