Connect a PC to a CRT TV or Monitor: Easy Steps

Connecting a modern PC to a CRT (cathode ray tube) TV or monitor lets you enjoy retro gaming, use a classic display for a project, or just experience the authentic look of a tube screen. This guide covers the two main connection paths: using a dedicated converter for VGA-only CRTs and using a TV with composite or component inputs. You will need to identify your CRT’s available inputs and your PC’s video outputs before you begin.

What You’ll Need

Your CRT TV or monitor
Your PC or laptop with a video output (HDMI, DisplayPort, USB-C, or VGA)
An appropriate video cable or adapter (HDMI-to-VGA, HDMI-to-composite, or a dedicated scan converter)
A separate audio cable or adapter if you want sound (CRT monitors often have no speakers; CRT TVs may need RCA audio)
Optional: a powered HDMI-to-AV converter box if your CRT only has composite (yellow) input

Step-by-Step

Identify your CRT’s inputs. Look at the back or side of the CRT. Common options are: a VGA (15-pin D-sub) port, a composite video input (single yellow RCA jack), component video (three RCA jacks: red, green, blue), or S-Video. CRT monitors almost always have VGA only. CRT TVs typically have composite and/or component.
Identify your PC’s video outputs. Modern PCs usually have HDMI, DisplayPort, or USB-C with DisplayPort Alt Mode. Older PCs may have VGA. Note which outputs are available and whether they are on a dedicated GPU or the motherboard.
Choose the right adapter or converter.
- CRT monitor with VGA: Use a simple HDMI-to-VGA adapter (or DisplayPort-to-VGA). These are passive, cheap, and work for most resolutions. If your PC only has USB-C, get a USB-C-to-VGA adapter.
- CRT TV with composite (yellow RCA): You need an active converter box that takes HDMI (or VGA) and outputs composite video. These are often labeled as “HDMI to AV” or “HDMI to RCA” converters. They require USB power.
- CRT TV with component (red/green/blue RCA): Use an HDMI-to-component converter. These are less common but available. They also need power.
Connect the video cable. Plug the adapter into your PC’s output, then connect the appropriate cable to the adapter and the CRT. For example: PC HDMI → HDMI-to-VGA adapter → VGA cable → CRT monitor. For a TV: PC HDMI → HDMI-to-AV converter → composite cable → TV’s yellow input.
Connect audio (if needed). If your CRT TV has RCA audio inputs (red and white), use a 3.5mm-to-RCA cable from your PC’s headphone jack to the TV. If you are using a converter box, it may have a 3.5mm audio input that you connect to your PC, and it will pass audio through to the RCA outputs. CRT monitors have no speakers, so you will need external speakers connected to your PC.
Power up the converter (if it has one). Most HDMI-to-composite or HDMI-to-component converters need USB power. Plug them into a USB port on your PC or a phone charger.
Turn on the CRT and your PC. Set the CRT to the correct input (e.g., AV1, Component, or VGA).
Adjust your PC’s display settings. On Windows, right-click the desktop and select “Display settings.” On macOS, go to System Settings → Displays. You should see the CRT as a second display. Set the resolution to something the CRT supports. For VGA CRTs, start with 1024×768 or 800×600 at 60Hz. For composite TVs, the maximum is usually 640×480 or 720×480. Set the refresh rate to 60Hz (or 50Hz for PAL).
If the screen is black or garbled, try a lower resolution. Boot into Safe Mode (Windows) or use a lower resolution from the display settings. Sometimes you need to set the resolution before connecting the CRT, or use a tool like CRU (Custom Resolution Utility) to create a custom resolution that matches the CRT’s native timing.

Common Mistakes

Using a passive HDMI-to-composite cable. These cables do not work. HDMI is digital, composite is analog; you need an active converter with a chip inside.
Setting the resolution too high. A CRT TV with composite input cannot display 1080p. It will show a black screen or a scrambled image. Stick to 480i/480p or 576i/576p.
Forgetting to connect audio. HDMI carries audio, but once you convert to VGA or composite, the audio is lost. You must connect a separate audio cable.
Not powering the converter. Many converters have a USB power cable that must be plugged in. Without it, there is no output.
Plugging VGA into a DVI-I port without an adapter. Some older GPUs have DVI-I ports that carry VGA signals, but you still need a DVI-to-VGA adapter. Check the port shape carefully.

Tips

For the best image on a CRT TV, use component video (if your TV has it) rather than composite. Component separates the color signals, giving a sharper picture.
Use a dedicated scan converter for retro gaming. If you are emulating old consoles, a device like a RetroTINK or OSSC (while expensive) will give better quality than a cheap HDMI-to-composite box, because it handles timing and scaling properly.
Set your PC to output 4:3 aspect ratio. Most CRT TVs and monitors are 4:3, not 16:9. Set your resolution to 1024×768 or 800×600 to avoid stretching.
If the image is too bright or dark, adjust the CRT’s brightness and contrast controls. Modern PC outputs can be too bright for an old tube.
Consider using a VGA switch if you have multiple PCs. This lets you share one CRT monitor between machines without unplugging cables.

Troubleshooting

No signal at all: Check all connections. Verify the CRT is on the correct input. If using a converter, make sure it is powered. Try a different resolution (lower). If using a VGA adapter, try a different one—some cheap adapters are faulty.
Garbled or rolling image: This usually means the refresh rate or resolution is wrong. Set the refresh rate to 60Hz (or 50Hz if PAL). Try a lower resolution like 640×480. If the image is rolling vertically, adjust the V-hold knob on the CRT if it has one.
Image is black and white: This happens when the composite cable is plugged into the wrong jack, or the converter is outputting S-Video instead of composite. Check the converter’s output switch (if any) and the TV’s input selection.
No sound: Connect a 3.5mm-to-RCA cable from your PC to the TV’s audio inputs. If using a converter, make sure the audio cable is plugged into the converter’s input, not the PC directly.
Windows does not detect the CRT: Try a different port on your GPU. Some GPUs disable analog outputs when a digital display is connected. You may need to plug the CRT in as the only display, then restart.
Image is too large or too small: Adjust the horizontal and vertical size/position controls on the CRT itself. These are usually knobs or buttons on the front or back of the TV.

Frequently Asked Questions

Can I connect a modern PC to a CRT TV without a converter?
Only if your PC has a VGA output and your CRT TV has a VGA input (rare for TVs, common for monitors). Otherwise, you need an active converter.

What is the maximum resolution a CRT TV can display?
For composite input, the practical maximum is 480i (NTSC) or 576i (PAL). For component input, some CRTs can do 480p or 1080i. CRT monitors with VGA can do much higher, often 1600×1200 or more.

Will a CRT TV work with a modern GPU that only has HDMI?
Yes, but you need an HDMI-to-composite or HDMI-to-component converter. These are active devices that convert the digital signal to analog.

Why does my CRT screen flicker?
CRTs inherently flicker at 60Hz (or 50Hz). This is normal. If it is excessive, try a higher refresh rate if the CRT supports it, or lower the resolution.

Can I use a CRT monitor for everyday PC use?
Yes, but text may be harder to read due to lower resolution and the screen’s curvature. It is fine for retro gaming or secondary displays.

Is it safe to leave a CRT on for long periods?
CRTs can overheat if left on for many hours. It is best to turn them off when not in use. Also, never open a CRT—the tube holds a dangerous charge even when unplugged.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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