Dell Inspiron 1720 (Mid 2007) - Manual (Page 31)

About Your Computer
31
Back View
S - VIDEO T V- OUT CONNECTOR
U S B CONNECTORS
1 S-video TV-out connector 2 USB connectors (2)
3 AC adapter connector 4 modem connector (RJ-11)
5 USB connector
Connects your computer to a TV. Also connects digital
audio-capable devices using the TV/digital audio
adapter cable.
Connect USB devices, such as a mouse, keyboard, or
printer.
1 2 3 4 5