Dell OptiPlex FN389 Quick Reference Manual page 50

8 hard drive access
light
9 vents
Side View
1 vents
2 mounting
holes
50
Quick Reference Guide
The hard drive access light is on when the computer reads
data from or writes data to the hard drive. The light might
also be on when devices such as your CD player are
operating.
The vents help prevent your computer from overheating. To
ensure proper ventilation, do not block these cooling vents.
1
The vents located on each side of the computer help prevent your
computer from overheating. To ensure proper ventilation, do not
block these cooling vents.
For mounting optional stand.
2