Dell U2713HM User Manual page 17

Pin 24-pin Side of the Connected Signal Cable
Numberr
1 TMDS RX2-
2 TMDS RX2+
3 TMDS Ground
4 Floating
5 Floating
6 DDC Clock
7 DDC Data
8 Floating
9 TMDS RX1-
10 TMDS RX1+
11 TMDS Ground
12 Floating
13 Floating
14 +5 V/+3.3 V power
15 Self test
16 Hot Plug Detect
17 TMDS RX0-
18 TMDS RX0+
19 TMDS Ground
20 Floating