Compaq 7020 User Manual page 22

Technical Information
Pin Assignment - Analog D-sub connector
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
3-4
Description
Red Video
Green Video/Sync on Green
Blue Video
Open
Return
Red GND
Green GND
Blue GND
+5V (for cable detect)
Sync GND
Open
Bidirectional DDC Data (SDA)
H. Sync.
V. Sync.
DDC Data Clock (SCL)
Compaq 7020 Flat Panel Monitor User's Guide