HP PE4240N - Manual (Page 71)

Specifications 67
Connector Specifications
Pin assignments and signal for VGA D-sub 15-pin RGB (analog) connector
Pin
number
VGA Signal (analog)
1 Red
2 Green or sync-on-green
3 Blue
4 No connection
5 Ground
6 Red ground
7 Green ground
8 Blue ground
9 No connection
10 Sync signal ground
11 No connection
12 Bi-directional data (SDA)
13 Horizontal sync or composite sync
14 Vertical sync
15 Data clock