Example 1: finding RGB paths
Pins 1, 2 and 3 carry the red, green and blue analog channels. If one color is missing on the display, these are among the first pins to inspect along with their ground returns.
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VGA Pinout Reference
VGA connector signal reference.
Reference data
VGA DE-15 / HD-15 (15)
Connected signal cable mating face from Dell A00: 1 at upper right, 5 upper left; rows 6–10 and 11–15 continue right-to-left. This model uses DDC; historic ID/reserved and supply functions vary by device.
5*: self-test on the cited Dell monitor; 9*: device-dependent +5/3.3 V. Do not assume these historical assignments apply to every VGA device.
Enlarged diagram
Selected contact: —
| Contact | Signal | Function |
|---|---|---|
| R | Data signal | |
| G | Data signal | |
| B | Data signal | |
| GND | Return / ground | |
| 5* | Control / sideband | |
| GND-R | Return / ground | |
| GND-G | Return / ground | |
| GND-B | Return / ground | |
| +5/3.3 V* | Power | |
| GND-sync | Return / ground | |
| GND | Return / ground | |
| DDC data | Data signal | |
| H-sync | Data signal | |
| V-sync | Data signal | |
| DDC clock | Data signal |
Contact references below do not establish viewing orientation. The mating face and wire side are mirror images. Match the exact plug/receptacle drawing before wiring; the diagram only groups functions.
What this page helps with
Read the RGB, synchronization and DDC groups of a VGA DE-15 interface. Analogue video and identification signals serve different roles.
VGA uses an analog video interface where signal quality depends on correct pin identification, grounding and adapter behavior. Even when the connector looks familiar, the pin function still matters because RGB, sync and DDC lines serve different purposes.
This page is useful for cable checks, legacy monitor work, industrial equipment support and adapter troubleshooting.
Formula or method
The page is structured as a practical reference: start with the visible table, diagram and labels, then compare them with the exact connector, device, enclosure or symbol set in front of you.
Use the listed sources to confirm revision, naming and application context. Similar labels can hide different electrical limits, pin functions or test conditions, so the page should be treated as a guided reference rather than a universal standard text.
How to use
- Read the DE-15 pin numbering carefully and do not assume passive adapters always preserve every function.
- Identify the RGB pins first, then confirm sync and ground paths before tracing the rest of the connector.
- If you are using an adapter, verify whether it is active or passive and whether the source actually outputs analog VGA.
Practical examples
Example 2: sync identification
Pins 13 and 14 typically correspond to horizontal and vertical sync. If the monitor powers up but cannot lock the image, checking these lines can be more useful than looking at color pins first.
Common mistakes
- Assuming every DisplayPort or HDMI adapter to VGA is passive.
- Ignoring ground and shield connections when checking signal pins.
- Relying on a generic pin image without verifying the actual device datasheet.
Limitations
- The selected signal table is not a complete adapter construction drawing. Viewing from the wire side reverses the mating-face layout, and grounds/identification contacts may depend on implementation.
- This page is a reference for legacy signal groups, not a guarantee that an adapter combination will work.
- Cable quality, analog bandwidth and monitor support still matter.
- Verify manufacturer documentation for real repair or integration work.
FAQ
Does a VGA pinout page guarantee adapter compatibility?
No. Compatibility depends on whether the source outputs analog signals and whether the adapter is active or passive.
Why are grounds listed together?
Because analog video quality depends heavily on correct return paths and shielding, not only on the signal pins themselves.
Is VGA still digital?
No. VGA is an analog interface.
Related tools
Explanation updated: 2026-09-15
This calculator provides an estimate for informational purposes only. It is not a certified engineering design, electrical safety approval, or professional installation recommendation. Always verify final decisions with a qualified professional and applicable local codes.