How to Use a TV as a Second Monitor via Wi-Fi: 5 Wireless Methods That Work

Turning your TV into a wireless second monitor is a task that can be accomplished in 10-30 minutes if you know the right tools. Modern Smart TVs support Miracast, AirPlay (for Apple) and specialized applications like Steam Link or SpaceDeskThe main advantage of this approach is the absence of wires that get in the way at home or in the office, and the ability to flexibly manage the workspace: for example, display presentations, videos, or games on the large screen while keeping work windows on the main monitor.

However, not all methods are equally effective. Response speed, image delays (input lag) and supported resolutions depend on the selected protocol, TV model, and even the router. In this article, we'll look at The only reliable way to check your TV's compatibility with wireless broadcasting before purchasing adapters — and we'll provide detailed step-by-step instructions for all current platforms: Windows, macOS, Android, and iOS. You'll also learn how to resolve common errors like "no sound" or "blurry image" that 70% of users experience when first connecting.

1. Check your TV compatibility: Does it support wireless streaming?

Before attempting to connect, make sure your TV is technically capable of receiving a Wi-Fi signal. Here are the key criteria:

• 📺 Model and year of manufacture: TVs older than 2016 often lack built-in support Miracast or AirPlay. The exception is the flagship series. Samsung (Q/MU series), LG (OLED or NanoCell) and Sony Bravia with Android TV.
• 🔄 operating system: Android TV, webOS (LG), Tizen (Samsung) or Google TV — they all support wireless broadcasting, but through different protocols. For example, Tizen works only with Miracast, A webOS - With Miracast And AirPlay 2.
• 📶 Wi-Fi module: For stable streaming, you need a dual-band router (2.4 GHz + 5 GHz). TVs that support Wi-Fi 5 (802.11ac) or Wi-Fi 6 will ensure minimal delays.

How to check quickly?

1. Open your TV settings and find the section Network → Wi-Fi Direct or Screen → Wireless Casting.
2. If there is a point Miracast, Screen Mirroring or AirPlay — your TV is compatible.
3. For Android TV check for app availability Google Home in the menu.

⚠️ Attention: Some TVs Samsung 2018–2020 models require manual activation Miracast through the service menu. To do this, press on the remote control Info → Menu → Mute → Power (the sequence may differ).

2. Method 1: Miracast (for Windows and Android) - a universal protocol without additional programs

Miracast — is a wireless streaming standard built into Windows (starting with 8.1) and most Android devices. It allows you to mirror or extend your screen without installing third-party software. Its main advantage is minimal latency (from 30 ms), which is critical for gaming or graphics work.

How to connect:

1. Activate the mode on your TV Screen Mirroring (on the menu Settings → Connections → Display).
2. On Windows PC:

   Win + K → Select your TV from the list

   If the point Win + K No, check Miracast support in Settings → System → Display → Multiple displays → Connect to a wireless display.

3. On Android: Open Settings → Connected devices → Screencasting.

Typical problems and solutions:

• 🔴 The TV is not locatedMake sure both devices are connected to the same Wi-Fi network (not a guest network!). Disable the VPN on your PC.
• 🔴 The image is lagging: Switch the router to the range 5 GHz or reduce the broadcast resolution to 1280×720.
• 🔴 No sound: In Windows sound settings, select TV as the output device.

Turn on Wi-Fi on your TV and PC | Disable Bluetooth on both devices | Restart your router | Update your graphics card drivers (for PC) -->

3. Method 2: AirPlay (for Apple and compatible TVs) - best quality for macOS/iOS

AirPlay 2 — a proprietary protocol from Apple that ensures stable broadcasting with with minimal delays (from 20 ms) and support 4K HDRWorks with TVs LG (webOS 4.0+), Samsung (2018+), Sony And Vizio, as well as through set-top boxes Apple TV or Amazon Fire TV Stick 4K.

Instructions for macOS/iOS:

1. Make sure your TV and Apple device are connected to the same Wi-Fi network.
2. Turn on the TV AirPlay in the settings (usually in the section Network → Apple AirPlay).
3. On Mac: Open Control Center → Screen Casting and select TV.
4. On iPhone/iPad: Swipe down to Control Center → Screen Casting.

Peculiarities:

• ✅ Supports duplication And extension screen.
• ✅ Automatically adjusts resolution to TV capabilities.
• ❌ Does not work with Windows without third-party software (for example, 5KPlayer).

4. Method 3: Steam Link – for gamers and powerful PCs

If you need to broadcast games or resource-intensive applications (for example, Photoshop or Blender), Steam Link — one of the best solutions. The application uses its own compression algorithms, which allows for the delay of the entire 10–30 ms even on average PCs. Resolutions up to 4K@60Hz.

How to set up:

1. Install Steam on PC and Steam Link on TV (available in Google Play for Android TV or App Store for Apple TV).
2. Activate it in Steam settings Settings → Login → Enable Steam Guard (Necessarily!).
3. Launch Steam Link on TV, select your PC from the list and connect.
4. For minimal delays, select in the broadcast settings Preset: Fast and limit the bitrate to 20 Mbps.

PC requirements:

• 🖥️ Video card: NVIDIA (10+ series), AMD (Radeon RX 400+) or Intel (Arc/Iris Xe).
• 📡 Net: Router with support Wi-Fi 5/6 and channel 5 GHz (preferably 80 MHz).
• 🔌 Nutrition: The laptop must be connected to the network - broadcasting drains the battery significantly.

How to reduce latency in Steam Link?

1. In the Steam Link settings on your TV, select Settings → Quality → Preset: Very Fast.

2. Disable it in Steam on PC Settings → Broadcast → Hardware Encoding (NVENC/AMF) - sometimes software coding works more stable.

3. Close all background programs that use the GPU (for example, a browser with YouTube tabs open).

5. Method 4: SpaceDesk – screen extension for working with documents

SpaceDesk — a free application that turns your TV into second monitor with support screen extensions (not just duplication). Ideal for office work: you can drag and drop windows. Excel, Word or browser on a large screen, leaving the main monitor for messaging apps. It works over a local network, but requires server installation on a PC.

Step-by-step setup:

1. Download SpaceDesk Driver (server) on a PC from the site spacedesk.net.
2. Install the application SpaceDesk on TV (available for Android TV, Fire TV And Samsung Tizen).
3. Launch the server on your PC and connect to it from your TV by entering the local IP address (can be found via ipconfig (in the command line).
4. In the settings, select the mode Extend (extension) and adjust the resolution.

Pros and cons:

6. Method 5: Apps from manufacturers (Samsung DeX, LG Screen Share)

Many brands offer their own wireless streaming solutions optimized for their TVs. For example:

• 📱 Samsung DeX: Turns your TV into an Android desktop (supports Bluetooth mouse/keyboard). Works with flagship smartphones. Galaxy S/Note (starting from S8).
• 🖥️ LG Screen Share: Analogue Miracast, but with improved stability for webOS.
• 🎮 Sony PlayStation Link: Optimized for streaming games with PS4/PS5 on Bravia.

How to activate Samsung DeX:

1. Connect your smartphone and TV to the same Wi-Fi network.
2. On your TV, open the app Samsung DeX (available in the menu).
3. On your smartphone, swipe down to the notification panel and tap DeX → Connect to TV.
4. Confirm the connection on both devices.

⚠️ Attention: When using Samsung DeX some applications (eg Netflix or Disney+) may block image output to an external screen due to DRM restrictions.

7. Connection optimization: how to reduce latency and improve quality

Even if you have achieved a stable connection, the quality of the broadcast may be degraded due to external factors. Here concrete steps for optimization:

• 📶 Router:
  • Switch to range 5 GHz (less congested, higher speed).
  • Turn on WMM (Wi-Fi Multimedia) in the router settings to prioritize traffic.
  • Turn it off Band Steering (if any) - it can force the devices to switch to 2.4 GHz.
• 🖥️ PC/laptop:
  • Update your graphics card drivers (especially for Intel UHD Graphics).
  • IN NVIDIA/AMD Control Panel set priority to Maximum productivity.
  • Disable power saving mode for your Wi-Fi adapter in Device Manager.
• 📺 TV:
  • Turn it off Energy saving in the network settings.
  • Set a fixed resolution (eg. 1920×1080) instead of Auto.
  • For Android TV turn on Developer mode and activate Keep the screen on.

If the image is choppy or slow, try:

1. Reduce broadcast resolution to 1280×720.
2. Disable background downloads on other devices on the network.
3. Use Ethernet for PC (if possible) and leave Wi-Fi only for TV.

8. Alternatives if nothing works

If your TV doesn't support wireless streaming or all methods produce unsatisfactory quality, consider these options:

• 🔌 Miracast/Wi-Fi Display Adapters: Devices like Microsoft Wireless Display Adapter or AnyCast connect to the TV's HDMI port and add support Miracast Even for older models. Price: from 1,500 ₽.
• 📡 Powerline adapters: If the problem is weak Wi-Fi, adapters TP-Link AV1000 transmit a signal through electrical wiring. Speed ​​up to 1 Gbps, delays are minimal.
• 🖥️ Mini-PC on Android/Windows: Connect a device like this to your TV Xiaomi Mi Box or Intel NUC and use it as a separate computer with remote access to the main PC via RDP or TeamViewer.

Adapter comparison:

⚠️ Attention: Cheap adapters (priced below 1,000 ₽) often use outdated versions Miracast with blue lags and artifacts. Before purchasing, check reviews on relevant forums (for example, 4PDA or Reddit).

FAQ: Frequently Asked Questions

Is it possible to use a TV as a second monitor for gaming? CS2 or Fortnite?

For competitive gaming (where reaction time is important), wireless methods are not suitable due to latency. 30+ msOptimal options:

• Steam Link via wire (Ethernet + HDMI) - delay 5–15 ms.
• NVIDIA Moonlight (requires NVIDIA graphics card) - delay 10–20 ms via local network.

For casual games (eg. GTA V or Minecraft) will do Miracast or AirPlay.

Why is there no sound when connecting via Miracast?

Problematic for Windows. Solutions:

1. Click Win + X → Device Manager → Sound, video and game controllers. Remove the device with the TV name and reconnect.
2. IN Sound parameters Select TV as the default output device.
3. Update your sound card drivers (especially if you are using Realtek).

If the sound still doesn't appear, try streaming only the video and outputting the sound through the speakers/headphones connected to the PC.

Is it possible to connect a TV as a second monitor to Linux?

Yes, but with restrictions. Options:

• Miracast: On Ubuntu/Debian, install the package gnome-network-displays:

  sudo apt install gnome-network-displays

  Then reboot and use Super + P to select the broadcast mode.

• SpaceDesk: The server part runs on Linux via Wine, but bugs are possible.
• Scrcpy: To broadcast the screen of an Android device to a TV (reverse scenario).

For AirPlay you will need third-party software like shairport-sync.

How to connect a TV to a PC if there is no router?

There are two ways:

1. Wi-Fi Direct:
   • Turn on the TV Wi-Fi Direct (usually in network settings).
   • On your PC, connect to the network created by your TV as an access point.
   • Launch Miracast (Win + K).

Mobile hotspot:

• Turn on Modem mode on a smartphone.
• Connect both your PC and TV to this network.
• Use any of the methods described above (eg. Steam Link).

Limitations: the speed will be lower than through a router, and connection interruptions are possible.

Why does the TV turn off after 5-10 minutes of connection?

Possible causes and solutions:

• Energy saving: Turn off the sleep timer in your TV settings (Settings → General → Power Saving).
• Adapter overheating: If you use an external Miracast adapter, make sure it is not overheating (try connecting it via a powered USB hub).
• Router limitationsSome routers turn off devices after being idle. In your router settings, find DHCP Lease Time and set the value 24 hours.