Dell OptiPlex 755 - Manual (Page 221)

Side View
Back View
Back Panel Connectors
8
hard drive
access light 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.
9 vents The vents help prevent your computer from overheating. To ensure proper ventilation, do not block these cooling vents.
1 vents
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.
2
mounting
holes
For mounting optional stand.
1 diagnostic lights See Diagnostic Lights for a description of light codes that can help you troubleshoot problems with your computer.
2 computer cover release knob Rotate this knob in a clockwise direction to remove the cover.
3 security cable slot See Padlock Ring and Security Cable Slot for information about using the security cable slot.
4 back panel connectors See Back Panel Connectors for a description of the connectors for your computer.
5 power connector Insert the AC power adapter plug.
6 vents The vents help prevent your computer from overheating. To ensure proper ventilation, do not block these cooling vents.
1
parallel
connector
Connect a parallel device, such as a printer, to the parallel connector. If you have a USB printer, plug it into a USB connector.
2
link integrity
light
l Green — A good connection exists between a 10-Mbps network and the computer.
l Orange — A good connection exists between a 100-Mbps network and the computer.
l Yellow — A good connection exists between a 1000-Mbps (1-Gbps) network and the computer.
l Off — The computer is not detecting a physical connection to the network or the network controller is turned off in system setup.
To attach your computer to a network or broadband device, connect one end of a network cable to either a network jack or your
network or broadband device. Connect the other end of the network cable to the network adapter connector on the back panel of your
computer. A click indicates that the network cable has been securely attached.