VGA to Composite AV: Converter Guide, PAL/NTSC Setup & Troubleshooting

VGA output cannot be connected directly to a yellow composite-video (AV/CVBS) input with a passive cable. VGA carries separate red, green and blue picture signals plus sync; composite combines video into one encoded signal for older TVs. The converter must actively process the timing and signal format.

The image above is a concept illustration from the original post. It is not a pinout or proof that a VGA-to-RCA wire alone will work.

What to buy

Look for an explicitly powered VGA-to-composite video converter whose VGA connector is marked INPUT and whose composite yellow RCA is marked OUTPUT. Some models also offer S-Video. Check that the converter supports your TV's video standard (PAL or NTSC) and provides a power lead. VGA does not carry sound, so use a separate audio lead from the computer if you need audio on the TV.

Connection steps

1. Turn off the display and connect the computer's VGA output to the converter's VGA input.
2. Set the converter to the TV's PAL or NTSC standard before powering it. Choose only a source resolution and refresh rate listed in that converter's manual.
3. Connect the converter's yellow composite output to the TV's yellow AV input. Connect red/white audio separately if needed.
4. Connect the specified low-voltage power supply, turn on the source and TV, then select the matching AV input.
5. If the picture is cropped or too small, use the converter's scan, size or position controls if it has them.

Image quality and limits

Composite video is standard-definition and combines colour and brightness information. Fine text, desktop icons and high-resolution computer graphics will look softer than on a VGA monitor. This converter is useful for older TVs, simple demonstrations or legacy equipment; it cannot make a composite TV display full VGA detail.

Troubleshooting

• No picture: confirm the converter direction, select the TV's AV input, check power and verify the PC is outputting a supported resolution and refresh rate.
• Rolling, black-and-white or unstable picture: check whether the TV and converter are both set to PAL or both set to NTSC.
• Picture is clipped or does not fill the screen: adjust scan/overscan controls or try a supported source mode.
• No sound: VGA has no audio channel; run a separate audio cable to the converter/TV if that model supports it.

Do not open a powered converter or connect an experimental cable to the TV. Use the manufacturer's pinout and power instructions. For example, StarTech's VGA2VID2 quick-start guide documents its VGA input, composite output, USB power and PAL/NTSC selection; other models may differ.

Reference: StarTech VGA2VID2 quick-start guide