Attaching the Cables: Dell™ 1504FP Flat Panel Color Monitor User's Guide
Cable Connections On Back of Monitor and Computer
Turn off your computer and unplug its power cable.
Connect either the white (digital DVI-D) or the blue
(analog D-sub) display connector cable to the corresponding video port on the
back of your computer. Do not use both cables on the same PC.
The only case in which both cables can be used is if they are
connected to two different PCs with appropriate video systems. (The
graphics are for illustration only. System appearance may vary).
Connect the power cable for your display to the power
port on the back of the display.
Plug the power cables of your computer and your
display into a nearby outlet.
Turn on your display and computer.
If your monitor displays an image, installation is complete. If it does not display an image, see Troubleshooting.
Note: If your PC does not support the connection for the "digital" video cable then it can remain unconnected
or it can be removed from the back of the monitor. This will not affect the performance of the monitor.