Dell Precision T7400 (Late 2007) - Manual (Page 147)

Adding and Replacing Parts 147
I/O-Panel Components
1 IEEE 1394 connector 2 USB ports (2)
3 diagnostic, hard-drive access, and
network integrity lights
4 microphone connector
5 headphone connector 6 front-panel air temperature sensor
NOTICE: The front-panel
temperature sensor cable
must be installed in this
connector at all times while
your computer is running or
thermal problems may result.
3
4
5
2
1
6