How to connect a laptop to a TV via...

Do you want to display your laptop screen on a large TV, but only have a USB cable at hand? Many users mistakenly believe that USB port on the TV is intended exclusively for flash drives or external hard drives. In fact, some models support video transfer via USB - albeit with important nuances.

In this article we will analyze all possible scenarios: from a standard connection through USB Type-C with support DisplayPort Alt Mode to workarounds for older TVs. You will learn what cables and adapters you will need, how to configure image output on screens Samsung QLED, LG OLED or budget models from Xiaomi, and also what to do if the TV “does not see” the laptop.

Spoiler: in 90% of cases, additional equipment will be required to fully transmit video and sound via USB. But there are exceptions - read on about that.

Is it possible to connect a laptop to a TV via USB only?

Short answer: depends on the TV and laptop model. Let's figure out why:

Most modern TVs are equipped with USB ports like Type-A (rectangular connectors) which are intended for:

📁 Read media files from flash drives
🖥️Keyboard/mouse connections (on some models)
🔄 Firmware updates

However only TVs with USB Type-C (oval connector) can transmit video signals directly, if the port supports the standard DisplayPort Alt Mode or Thunderbolt 3/4. This is true for flagship models Samsung QN900C, LG C3 or Sony X95L, released after 2020.

If your TV is older or has only USB Type-A, then to output an image from a laptop you will need:

🔌 Adapter USB → HDMI (with active chip)
🖥️ Special software for screen broadcasting (for example, Miracast or AirPlay)
📡 Wireless solutions (if cable connection is not possible)

📊 What kind of TV do you have?

With USB Type-C (new)
USB Type-A only (old)
No USB ports
I don't know

What cables and adapters will you need?

The choice of equipment depends on what ports are on your laptop and TV. Let's consider all the options:

Connection scenario	Required equipment	Example models	Notes
Laptop with USB-C → TV with USB-C	Cable `USB-C → USB-C` (with support `DisplayPort`)	Anker 565, CableMatters 201056	Works only on TV with `DP Alt Mode`
Laptop with USB-A → TV with HDMI	Active adapter `USB 3.0 → HDMI`	StarTech USB32HDEH, Plugable UGA-2K-A	Requires driver installation
Laptop with USB-C → TV with HDMI	Adapter `USB-C → HDMI` or cable `USB-C/HDMI`	Apple USB-C Digital AV, Belkin F2CU040	Supports `4K@60Hz` on new adapters
Universal solution	Docking station with `USB-C/HDMI`	Dell WD19TB, CalDigit TS4	Suitable for office laptops

⚠️ Attention: Cheap passive adapters USB → HDMI (without external power supply) do not work! Video transmission requires an active chip that converts the signal. Focus on models marked “DisplayLink" or "Active».

If you are unsure about compatibility, check the port specifications:

🔍 On a laptop: go to Device Manager → Video adapters and see if your graphics card supports USB output.
📺 On TV: look for a mention in the instructions or on the manufacturer’s website USB-C with DisplayPort or Thunderbolt.

The laptop has USB 3.0 or later|The TV supports the desired input (HDMI/USB-C)|The adapter has an active chip (not passive)|The cable is certified for video transmission-->

Step-by-step instructions: connecting via USB-C (DisplayPort Alt Mode)

If your TV and laptop have ports USB Type-C with video support, follow these instructions:

Check port compatibility:
- 🖥️ On a laptop: the port must support DisplayPort Alt Mode or Thunderbolt 3/4 (usually marked with the symbol ⚡).
- 📺 On TV: look for the port USB-C marked "DisplayPort" or "HDMI Alt Mode».

Connect the cable:

Use a certified cable USB-C → USB-C (For example, Anker PowerLine+). Connect one end to your laptop and the other to your TV. The cable length should not exceed 2 meters for a stable signal.

Select signal source:

On the TV remote control, press the button Source (or Input) and select the port USB-C. On some models Samsung this item may be called "USB-C (DP)».

Set up image output on your laptop:

B Windows: press Win + P and select the mode "Duplicate», «Expand" or "Second screen only" On macOS: go to System Settings → Monitors.

⚠️ Attention: If the image does not appear, check:

🔌 The cable is connected to correct USB-C port (some laptops have multiple ports, but only one supports video).
🔄 Try rebooting the laptop with the cable connected - sometimes the drivers are initialized only after a reboot.
📋 Update your video adapter drivers (especially important for Intel Iris Xe or AMD Radeon).

💡

If the TV does not recognize the signal, try connecting the cable to the laptop first, and then to the TV. Some models LG require exactly this sequence.

USB-A Connection: Workarounds

If the TV only has a port USB Type-A, and on a laptop - USB 3.0 (blue connector), can be used active adapter with chip DisplayLink. Here's how it works:

Algorithm of actions:

Buy an adapter USB 3.0 → HDMI (For example, Plugable UGA-2K-A or Wavlink USB to HDMI).
Connect the adapter to the USB port of your laptop and to the HDMI port of your TV.
Install drivers from the adapter manufacturer's website (usually DisplayLink Manager).
In screen settings (Win + P) select the output mode.

Limitations of this method:

🎮 Video latency (~50–100 ms), which is critical for games.
🖥️ Maximum resolution — 1920×1080@60Hz (4K is not supported).
🔊 Sound is transmitted separately (you need another cable or Bluetooth).

⚠️ Attention: Adapters on a chip DisplayLink don't work with macOS newer Ventura 13.3 — Apple has blocked support for third-party graphics solutions.

Why doesn't a cheap USB→HDMI adapter work?

Cheap adapters (price < 1000 ₽) are usually passive and do not contain a chip for signal conversion. They can only work for connecting peripherals (keyboard, mouse), but not for video transmission. For video, you need an active adapter with a processor that “draws” the picture anew - that’s why they are more expensive and require drivers.

Alternative connection methods (if USB doesn't work)

If connecting via USB is not possible, consider these options:

1. Wireless broadcast (Miracast / AirPlay)

Modern TVs Samsung, LG And Sony Support wireless screen transfer:

🪄 Miracast (Windows/Android): In your TV settings, turn on "Screen Mirroring", on a laptop - Win + K → «Connect to a wireless display».
🍎 AirPlay (macOS/iOS): Works on TVs with Apple TV or built-in support (for example, LG CX and newer).

2. Connect via HDMI (recommended method)

If your laptop has a port HDMI or Mini DisplayPort, use it:

🔌 Buy a cable HDMI → HDMI (for 4K@60Hz you need a cable marked "High Speed" or "Premium Certified»).
🎮 For Mini DisplayPort you will need an adapter Mini DP → HDMI.

3. Using the docking station

For business laptops (Dell Latitude, HP EliteBook) convenient to use the docking station:

💼 The docking station is connected to the laptop via USB-C/Thunderbolt and provides multiple ports including HDMI.
⚡ Examples: Dell WD19, Lenovo ThinkPad Thunderbolt 4 Dock.

💡

HDMI remains the most reliable connection method - it supports 4K@120Hz, multi-channel audio and does not require drivers. USB solutions are inferior in stability and quality.

Problem solving: TV does not see laptop via USB

If the TV screen remains black or an error appears after connecting, follow these steps:

Problem	Possible reason	Solution
No image	Incorrect USB-C port	Try a different port on your laptop (look for the ⚡ symbol)
Resolution is too low	Video adapter drivers are out of date	Update the driver via `Device Manager` or manufacturer's website
Sound is not transmitted	USB cable does not support audio	Use a separate cable `3.5mm → RCA` or Bluetooth
Image stuck	Lack of USB 2.0 bandwidth	Connect to a port `USB 3.0` (blue connector)

For diagnostics in Windows:

Click Win + X → Device Manager.
Check the section "Video adapters» for the presence of exclamation marks.
If there is a problem with the driver, right-click → "Update driver».

On macOS:

Open About This Mac → System Report → Graphics/Displays.
Make sure your TV appears in the list of connected displays.

💡

If your TV gives you an "Unsupported Format" error, try manually setting the resolution on your laptop. On Windows: Settings → System → Display → Advanced display options → select 1920×1080@60Hz.

Comparison of connection methods: which is better?

To choose the optimal method, let’s compare the key parameters:

Connection method	Max. resolution	Latency (ms)	Sound	Cost	Difficulty
USB-C → USB-C (DP Alt Mode)	`4K@60Hz`	5–10	Yes	500–2000 ₽ (cable)	⭐
USB 3.0 → HDMI (DisplayLink)	`1080p@60Hz`	50–100	No	3000–6000 ₽ (adapter)	⭐⭐⭐
HDMI → HDMI	`8K@60Hz`	0–5	Yes (5.1/7.1)	300–1500 ₽ (cable)	⭐
Miracast/AirPlay	`4K@30Hz`	30–80	Yes	0 ₽ (built-in)	⭐⭐

Conclusion:

🎮 For games and videos 4K use HDMI.
💼 Suitable for office work USB-C → USB-C (if supported).
📱 To temporarily broadcast the screen - Miracast.
🔧 USB 3.0 → HDMI - the last option if there is nothing else.

FAQ: Frequently asked questions

Is it possible to transfer sound to a TV via USB?

Yes, but only if used USB-C supported DisplayPort Alt Mode. In this case, the sound is transmitted automatically. When connected via adapter USB 3.0 → HDMI sound is not broadcast - you will need a separate audio connection (for example, Bluetooth or cable 3.5mm → RCA).

Why does my TV say "Unsupported USB device"?

This error appears in two cases:

You have connected your laptop to the port USB Type-A, which is intended only for flash drives. Solution: use USB-C or HDMI.
Your TV does not support the function USB OTG for external devices. Solution: Update your TV's firmware or use wireless streaming.

How to connect a laptop to an old TV without HDMI?

If the TV only has ports VGA, Composite (RCA) or SCART, you will need:

Adapter USB → VGA (For example, StarTech USB32VGAE) + cable VGA → VGA.
Or converter HDMI → RCA (For example, Portta PET0301S) if the laptop has HDMI.

⚠️ Please note that the image quality will be low (maximum 1024×768), and the sound will have to be output separately.

Can I charge my laptop through the TV's USB port?

No, most TVs do not provide enough power to charge a laptop. USB ports on TV usually provide 0.5–1A, whereas laptops require 2–5A. The exception is TVs with a port USB-C Power Delivery (For example, LG OLED Z2), but in this case the charging speed will be minimal.

How to enable developer mode on TV for advanced USB settings?

On TVs Android TV (For example, Sony Bravia or Xiaomi Mi TV) you can activate developer mode:

Go to Settings → About TV → Software version.
Click on the item "Software version» 7 times in a row until the message «You became a developer».
Return to Settings → For Developers and turn on "USB Debugging».

This may help if the TV does not recognize the connected device.

Connecting a laptop to a TV via USB: all methods and life hacks