Dell ST2420LB, ST2421L appendix DVI Connector, Pin Pin Side of the Connected Signal Number Cable

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Video-Red

Video-Green

Video-Blue

GND

Self-test

GND-R

GND-G

GND-B

Computer 5V/3.3V

GND-sync

GND

DDC data

H-sync

V-sync

DDC clock

DVI Connector

Pin	24-pin Side of the Connected Signal
Number	Cable

1TMDS RX2-

2TMDS RX2+

3TMDS Ground

4Floating

5Floating

6DDC Clock

7DDC Data

8Floating

9TMDS RX1-

10TMDS RX1+

11TMDS Ground

12Floating

13Floating

14+5V power

15Self test

16Hot Plug Detect

17TMDS RX0-

18TMDS RX0+

19TMDS Ground

20Floating

21Floating

22TMDS Ground

23TMDS Clock+

24TMDS Clock-

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Contents Dell ST2420L/ST2421L monitor Users Guide Package Contents About Your MonitorBack View Product FeaturesIdentifying Parts and Features Front View Front View Front Panel Controls Label DescriptionBack View Label Description/Use Side ViewBottom View Left SideMonitor Specifications Power Management ModesPin Assignments DVI Connector Pin Pin Side of the Connected Signal Number CableFlat Panel Specifications Model ST2420L/ST2421LPhysical Characteristics ResolutionPreset Display Modes Video Supported ModesPlug and Play Capability Maintenance GuidelinesEnvironmental LCD Monitor Quality & Pixel PolicyCaring for Your Monitor Appendix Setting Up Your Monitor Click Change Display Settings Click Advanced Settings Using the Front Panel Using the On-Screen Display OSD MenuOperating the Monitor Main Menu for non Analog non VGA Input Brightness Contrast Back Auto Adjust Input Source Auto SelectVGA DVI-D Hdmi Display Settings Page DDC/CI Factory Reset PersonalizeOSD Warning Messages Setting the Maximum Resolution Using the Dell Soundbar OptionalClick Change Display Settings Using the Tilt TiltSetting Up Your Monitor Dell ST2420L/ST2421L monitor Setting Up the Monitor Attaching the BaseConnecting the Monitor Attaching the Soundbar Optional Removing the Monitor StandSolving Problems Built-in DiagnosticsSelf-Test Common Problems Common Symptoms What You Experience Possible SolutionsProduct-Specific Problems Troubleshooting the Dell Soundbar OptionalBack to Contents