Attach a PS/2 mouse to the PS/2-compatible connector on the computer or a USB-compatible mouse to the USB port connector. If you attach a USB mouse to thecomputer, you do not need to reboot the computer in order to use the mouse. The touch pad device drivers that Dell installed on your hard-disk drive work with a PS/2 mouseor 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.MonitorConnecting an External MonitorNOTICE: Do not place the monitor directly on top of your computer, even if it is closed. Doing so can crack the computer case, the display, or both.Turn off the external monitor and your computer. Set the monitor on a monitor stand, desk top, or other level surface near the computer.Connect the external monitor's video cable to the computer.Plug the monitor cable connector into the matching video connector at the back of the computer. If the cable is not permanently attached to the monitor, connect it to themonitor also.Tighten all the screws on the monitor cable connector(s) to eliminate RFI.Connect your external monitor to a grounded electrical outlet.Plug the 3-prong connector on one end of the monitor's power cable into a grounded power strip or some other grounded power source. If the cable is not permanentlyattached to the monitor, connect it to the monitor also.Using an External MonitorThe video image can be displayed on an external monitor, on the computer's display, or on both simultaneously. To toggle between the three display modes, press.Parallel DevicesTo connect parallel devices to your computer, perform the following steps:Turn off the computer.Plug the connector on the device's I/O cable into the parallel port connector on the back of the computer.Tighten all the screws on the cable connector to eliminate RFI.NOTE: When you use the external monitor and integrated display simultaneously, the refresh rate is always 60 Hz.