Dell Latitude C840 - Manual (Page 26)

Docking Connector
S-Video
Pin Signal
1 GND
2 GND
3 DLUMA-L
4 DCRMA-L
Composite Video
Pin Signal
5 SPDIF
6 DCMPS-L
7 SPGND
Pin Signal Pin Signal
1 STRB#/5V 101 VGA_GRN
2 PD0 102 GND
3 PD1 103 VGA_RED
4 PD2 104 GND
5 PD3 105 VGA_BLU
6 PD4 106 DOCK_SD/MODE
7 PD5 107 D_IRTX
8 PD6 108 D_IRRX
9 PD7 109 GND
10 GND 110 SPIRQB#
11 DOCK_SPKR 111 SPIRQC#
12 DOCK_MIC 112 DAT_DDC2
13 DOCK_LINE 113 CLK_DDC2
14 DOCK_CDROM 114 SPAR
15 GND 115 SPME#
16 M_SEN# 116 GND
17 POWER_SW# 117 SSERR#
18 QPCIEN# 118 SPERR#
19 S1.6M_EN# 119 SLOCK#
20 DFDD/LPT# 120 SSTOP#