Dell Inspiron 7500 System Reference Manual page 58

Pin Signal
1 EXK_MSDATA
2 NC
3 GND
4 EXK_MSPWR
5 EXK_MSCLK
6 NC
Shell N/A
TV-Out S-Video Connector
If the television has an S-video cable, plug it directly into the system at the S-video TV-out connector. If the television has a composite cable,
complete the following steps:
1. Connect the cable that came with your system to the S-video TV-out connector.
2. Connect the other end of the cable to the television's composite cable.
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I/O Definition
I/O External keyboard/keypad/mouse data
N/A No connection
N/A Signal ground
N/A External keyboard/keypad/mouse supply voltage
I/O External keyboard/keypad/mouse clock
N/A No connection
N/A Chassis ground