Dell Inspiron 7000 - Manual (Page 33)

Using an External Keyboard, Keypad, or Mouse: Dell™ Inspiron™ 7000
You can connect a keyboard with a standard connector to the PS/2 connector on the computer by using an adapter available from Dell. You can use the built-in
keyboard when an external keyboard is attached to the computer. Turn off the computer before connecting or disconnecting a keyboard.
You can attach an external numeric keypad to the PS/2 connector. Turn off the computer before connecting or disconnecting a keypad.
Attach a PS/2-compatible mouse to the PS/2 connector on the computer or a USB-compatible mouse to the USB connector. If you attach a USB mouse to the
computer, you do not need to reboot in order to use the mouse. If you attach a serial mouse to the serial connector, set the PS/2 Mouse option in the System
Devices menu to Disabled.
The touch pad device drivers that Dell installed on your hard-disk drive work with a PS/2 mouse, serial mouse, or USB mouse from Dell. If you did not receive your
mouse from Dell, you must install device drivers separately to use the mouse. This software is usually included with mouse installation kits.
NOTES: If you attach a serial mouse to the serial connector, set the PS/2 Mouse option in the System Devices menu to Disabled. The serial (external)
port permits use of a modem without touch pad conflict.
If you are using a PS/2 mouse that is not Microsoft-compatible and the mouse does not work properly, reboot the computer. If the mouse still does not
work, install the drivers from the diskette that came with the mouse, and reboot the computer.