Dell XPS M1530 (M1530, Late 2007) - Manual (Page 117)

Pin Assignments for I/O Connectors 117
HDMI Connector
S-Video
Pin
Signal
1 GND
2 GND
3 DLUMA-L
4 DCRMA-L
Composite Video
Pin
Signal
5 GND
6 DCMPS-L
7 NC
19 17 15 13 11 9 7 5 3 1
20 18 16 14 12 10 8 6 4