Dell OptiPlex 320 - Manual (Page 9)

Quick Reference Guide
9
3 Connect the monitor using either the white DVI cable or the blue VGA cable (do not connect both
cables).
Align and gently insert the monitor cable to avoid bending connector pins. Tighten the thumbscrews
on the cable connectors.
NOTE:
Some monitors have the video connector underneath the back of the screen. See the documentation
that came with your monitor for its connector locations.
Set Up Your Monitor
4 Connect the speakers.
5 Connect power cables to the computer, monitor, and devices and connect the other ends of the power
cables to electrical outlets.