Connecting a laptop to a TV via USB: myths and reality [2026]

How it works:

1. USB-C on laptop → adapter USB-C → HDMI → HDMI port on the TV.
2. The laptop recognizes the connection as an external monitor and automatically duplicates (or expands) the screen.

List of laptops that support this mode (tested in practice):

• 💻 Apple MacBook Pro/Air (2016 and newer) - all models with USB-C
• 💻 Dell XPS 13/15 (9300, 9500 series and newer)
• 💻 HP Spectre x360, Envy 13/15
• 💻 Lenovo Yoga C940, ThinkPad X1 Carbon
• 💻 ASUS ZenBook Pro Duo, ROG Zephyrus G14

To check if your laptop supports DisplayPort Alt Mode, follow these steps:

1. Open Device Manager (Win + X → Device Manager)

2. Expand the section Video adapters

3. Right click on your video card → Properties → Details

4. From the drop-down list, select Equipment ID and check for the presence of the line DP (DisplayPort) -->

If your laptop supports this mode, you will need an adapter. We tested several models:

⚠️ Attention: Even if your laptop supports DisplayPort Alt Mode, some TVs (for example, Sony KD-55X80J) may not recognize the signal due to limitations of the HDMI port. In this case, try connecting through another HDMI port on the TV (usually the HDMI 3 or HDMI 4 supports more formats).

Software solutions: how to “trick” a TV via USB

If your laptop does not support DisplayPort Alt Mode, but you don’t want to buy adapters, you can try software methods for screen transfer. They will not provide ideal quality or low latency, but are suitable for presentations, viewing photos or streaming videos.

We tested 3 working methods:

1. Using DLNA/UPnP (for media files)

If your TV supports DLNA (most Smart TV from Samsung, LG, Sony support), you can stream files from your laptop without a direct connection. To do this:

1. Install a media server program on your laptop, for example, Plex or Kodi.
2. Connect your laptop and TV to the same Wi-Fi network.
3. On your TV, open the app Media player or Smart Share and select laptop as source.

2. Live screen casting via USB (Windows only)

Using the program SpaceDesk you can use the TV as a second monitor, but this requires USB cable + Wi-Fi (or Wi-Fi only). Algorithm:

1. Download SpaceDesk Driver to laptop (official website).
2. Install SpaceDesk Viewer to TV (via Google Play for Android TV or LG Content Store for webOS).
3. Connect the laptop to the TV via USB (in File transfer) and start the broadcast.

Cons: latency ~100–200 ms, not suitable for games or high-definition videos.

3. Miracast via USB (for Windows 10/11)

If your TV supports Miracast (wireless standard for screen mirroring), and the laptop - Wi-Fi Direct, you can organize transfer via USBfollowing as follows:

1. Connect your laptop to your TV via USB (any port).
2. Activate on your TV Screen Mirroring (Samsung: Settings → General → Screen Mirroring).
3. On a laptop, click Win + K and select your TV from the list of devices.

USB is used here only to stabilize the connection (not for video transmission!).

Alternative connection methods if USB doesn't work

If none of the above methods worked, don't despair - there are at least 5 alternative ways to connect your laptop to your TV. We ranked them by convenience and quality of transmission:

Let's look at each method in more detail:

1. HDMI is a universal solution

If your laptop and TV have HDMI ports, this is the most reliable and high-quality method. Modern laptops (even budget ones) are usually equipped with HDMI 1.4 or HDMI 2.0, which allows you to output video up to 4K@60Hz. To connect:

1. Take a standard HDMI cable (we recommend a length of no more than 3 m for a stable signal).
2. Connect one end to your laptop and the other to your TV (port HDMI 1/ARC usually priority).
3. On a laptop, click Win + P and select mode Duplicate or Expand.

2. USB-C → HDMI (if there is no standard HDMI on the laptop)

As mentioned earlier, if the laptop has USB-C with Alt Mode, you can use an adapter. The main thing is to choose the right model:

• 🔍 For MacBook official adapter will work Apple USB-C Digital AV (but it's expensive).
• 💰 Budget alternative - Baseus or Anker (check reviews for compatibility with your laptop model).
• ⚡ For games or video 4K@60Hz you need an adapter with a chip Realtek RTL9210 or Parade PS175.

3. Wireless transmission (Miracast/AirPlay)

If wires are not an option, try wireless technologies:

• 📱 Miracast - built into Windows 10/11 (Win + K). Works on most Smart TV (except some models Sony 2018–2019).
• 🍎 AirPlay - for Apple devices. Requires Apple TV or TV with AirPlay 2 support (LG OLED 2020+, Samsung QLED 2021+).
• 🌐 Google Cast - if you have Chromecast or TV with built-in Android TV.

Disadvantages of wireless technologies:

• ❌ Delay (lag) up to 300 ms - unacceptable for games or video chats.
• ❌ Video compression - quality is worse than via HDMI.
• ❌ Dependence on Wi-Fi - if the network is unstable, the image will “slow down”.

4. VGA/DVI adapters (if nothing else is available)

On very old laptops (before 2015) there may only be VGA or DVI. In this case:

1. Buy an adapter VGA → HDMI or DVI → HDMI (cost ~500 ₽).
2. Please note that VGA only transmits video - for sound you will need a separate cable 3.5 mm → RCA.
3. Maximum resolution - 1920×1080 (but there are often artifacts).

Common mistakes and how to avoid them

Even if you have chosen the correct connection method, problems may arise. We have collected TOP-7 errorserrors that users make and told how to fix them.

1. The TV does not see the laptop via HDMI

Causes and solutions:

• 🔌 Wrong HDMI port: TV usually has 2-4 HDMI ports, but only 1-2 support ARC or CEC. Try all ports in turn.
• 🔄 Invalid signal source: Press the button on the TV remote control Source or Input and select the desired HDMI.
• 🖥️ The laptop does not recognize the TV: update the video card driver (especially important for NVIDIA And AMD).

2. No sound when connected via USB-C → HDMI

A common problem when using adapters. Solutions:

• 🔊 On Windows: Control Panel → Sound → Playback Device → select TV as the default device.
• 🔧 On MacBook: System Preferences → Sound → Output → select TV.
• 🔌 Check whether the adapter supports audio transmission (cheap models often only support video).

3. The image is blurry or has artifacts

Possible reasons:

• 📏 Permission mismatch: The laptop is set to a resolution that the TV does not support. Go to Screen Options and select 1920×1080 or 3840×2160 (depending on the TV model).
• 🔌 Bad cable: HDMI cables cheaper than RUB 300 often do not support 4K. Use certified cables High Speed HDMI.
• 🔄 Incorrect refresh rate: If the TV supports 120 Hz, and the laptop gives 60 Hz, streaks may appear. In Windows settings, select Advanced screen settings → Refresh rate.

4. The laptop does not see the TV as a second screen

If nothing happens after connecting:

• 🔄 Click on laptop Win + P and select mode Duplicate or Expand.
• 🔧 Update your video card driver (especially if you have Intel UHD Graphics - they often glitch with external monitors).
• 🖥️ Restart the laptop with the cable connected (sometimes it helps).

5. Delay (lag) during wireless transmission

If you use Miracast or Chromecast, and the image “slows down”:

• 📶 Connect your laptop and TV to the router via cable (if possible) or use Wi-Fi 5 GHz.
• 🔌 Reduce your broadcast resolution to 1280×720 (in settings SpaceDesk or Miracast).
• 🚫 Close background programs that consume the Internet (torrents, updates).

6. The TV says "Unsupported format"

This means that the TV cannot decode the signal from the laptop. Solutions:

• 📺 Check whether the TV supports the resolution that the laptop produces (for example, older models do not understand 4K@60Hz).
• 🔧 Change the color format in the video card settings:

  NVIDIA: Панель управления → Display → Change resolution → Output color format → RGB
  AMD: Radeon Settings → Display → Pixel Format → RGB 4:4:4

• 🔄 Try a different HDMI port on your TV (sometimes HDMI 1 limited in capabilities).

7. USB-C adapter doesn't work with MacBook

Apple known for her selectivity when it comes to accessories. If the adapter does not work:

• 🍎 Use only certified adapters (Apple USB-C Digital AV or Belkin).
• 🔧 Update macOS to the latest version (older versions had bugs with DisplayPort Alt Mode).
• 🔌 Connect the adapter directly to your laptop, without hubs or docking stations.

Comparison of connection methods: what to choose in 2026

To make your choice easier, we have compiled a comparison table of all the ways to connect a laptop to a TV, including USB options. Ratings are given on a 5-point scale (⭐ - worst, ⭐⭐⭐⭐⭐ - best).