Dell ST2420L - DVI Connector

Pin Number 15-pin Side of the Connected Signal
Cable
1 Video-Red
2 Video-Green
3 Video-Blue
4 GND
5 Self-test
6 GND-R
7 GND-G
8 GND-B
9 Computer 5V/3.3V
10 GND-sync
11 GND
12 DDC data
13 H-sync
14 V-sync
15 DDC clock
DVI Connector