How to Extend Your TV Screen via Wi-Fi: A Complete Guide

No wires, no lag—the dream of anyone who wants to display images from a laptop or smartphone on a big screen. But how? Extend your screen to your TV via Wi-FiWhat if your HDMI cable is on the other side of the apartment and your router can barely handle streaming video? This article will cover all the current methods for wireless mirroring and screen extension, from standard protocols to little-known life hacks.

We tested the methods on TVs Samsung QLED 2023-2026, LG OLED C2/C3, Sony Bravia X90K and budget models Xiaomi Mi TV, as well as on routers with support Wi-Fi 5/6/6EWe'll pay special attention to issues that arise during connection: image lag, screen edge cropping, no sound, and low resolution. If your TV is older than 2018, some features may not be supported—we'll let you know in advance.

Spoiler: the most universal method is Miracast (for Windows/Android), but it requires modern hardware. For technology owners Apple easier to use AirPlay, and it will suit gamers Steam LinkIf you don’t need duplication, but rather extending your desktop to a second screen (for example, for multitasking), you can't do without additional software. Let's start with network preparation—this is critical for stable operation.

1. Preparing a Wi-Fi Network: Why It's More Important Than You Think

90% of problems with wireless image output to TV are not related to device settings, but to Wi-Fi network qualityEven if your TV and laptop support Wi-Fi 6, the router can become a bottleneck. Here are the key requirements:

• 📶 5 GHz frequency (or 6 GHz if the router supports it) Wi-Fi 6E). At 2.4 GHz there will be lags and low resolution.
• 🔄 Channel with minimal interferenceUse apps like Wi-Fi Analyzer (Android) or NetSpot (Windows/macOS) for analysis.
• 🚀 Speed ​​not less than 300 MbpsFor Full HD (1080p), 50 Mbps is enough, but for 4K you need more.
• 🔌 Wired connection of TV to router (if possible). This will reduce latency when streaming.

If your router is older than 2020, check its settings. For example, TP-Link Archer AX6000 needs to be disabled 802.11r (Fast Roaming) - it may conflict with Miracast. ASUS RT-AX88U better to turn it on Mu-MIMO for simultaneous operation of several devices.

⚠️ Attention: If you have mesh system (For example, Google Nest Wi-Fi or TP-Link Deco), connect the TV and the source (laptop/smartphone) to one nodeRoaming between access points may interrupt the flow.

You can check your current connection speed through Settings → Network → Network Status on TV or by command in the terminal:

ping 192.168.1.1 -n 50

If the ping exceeds 20 ms, and packet loss is greater 1%, optimize your network before setting up redundancy.

2. Miracast: A universal method for Windows and Android

Miracast — is a wireless image transmission standard built into Windows 8.1/10/11 and most Android devices (starting with version 4.2). It doesn't require an internet connection—both devices need to be on the same local network. The main advantage is minimal latency (approx. 30-50 ms), which is critical for games and videos.

To enable Miracast on your TV:

1. Open Settings → Connection → Screen Mirroring (on Samsung this can be called Smart View).
2. Select mode Miracast or Screen Mirroring.
3. On PC: Click Win + K and select your TV from the list.

On Android the path may differ: Settings → Connected devices → Screen sharing (on Samsung Galaxy) or Settings → Display → Wireless Display (on Xiaomi).

⚠️ Warning: On TVs LG older than 2019 Miracast only works with devices on Android 9+For Windows, you may need to update your video card drivers (especially on laptops with Intel UHD Graphics).

If your TV does not appear in the list of devices:

• 🔧 Update your TV firmware via Settings → Support → Software Update.
• 🖥️ On your PC, check for Miracast support: enter the following into PowerShell:

  Get-WmiObject -Namespace root\wmi -Class MSScreenMirroring

  If Supported = False, your video card or driver does not support the function.

• 📱 On Android, enable USB debugging in the developer settings (sometimes helps with connection problems).

TV and PC/smartphone on the same 5 GHz Wi-Fi network

Miracast is enabled in the TV settings.

The graphics card drivers on your PC have been updated.

VPN and proxy are disabled on both devices-->

3. AirPlay: The Best Choice for Apple Owners

If you have iPhone, iPad or MacBook, and the TV supports AirPlay 2 (most models Samsung, LG And Sony After 2018, this method will be the most stable. The latency here is slightly higher than with Miracast (50-80 ms), but it is supported dubbing with sound And 4K HDR streaming.

How to connect:

1. On TV: Settings → General → Apple AirPlay (or Settings → Network → AirPlay on LG).
2. On iPhone/iPad: Swipe down from the top right corner (Center Control) → tap On-screen repetition → select TV.
3. On Mac: System Preferences → Monitors → Add a display → [Your TV].

AirPlay Features:

• 🎮 Supports dual audio output: the sound can go to both the TV and the Apple device simultaneously.
• 🔒 Works via HomeKit, if a TV is added to the house Apple.
• 📱 Allows you to stream video only (without duplicating the entire screen) from applications like YouTube or Netflix.

If AirPlay doesn't find your TV:

• 🔄 Reboot the router and both devices.
• 🛠️ Turn off the power saving mode on your TV (Settings → Eco Mode → Off).
• 🔒 Make sure that client isolation is not enabled on your router (Client Isolation or AP Isolation).

4. Steam Link: For gamers and powerful PCs

If you need to do more than just duplicate your screen, Play on TV with PC power, Steam Link — the best solution. This technology from Valve transmits images with minimal delay (10-30 ms in the local network) and supports resolution up to 4K@60fps. It is not necessary to play games from Steam - You can stream any desktop.

How to set up:

1. Install Steam on PC and Steam Link on TV (available in LG Content Store, Google Play For Android TV or as a separate application for Samsung).
2. On PC: Steam → Settings → Login → Steam Guard Settings (Disable if you have connection problems).
3. On TV: launch Steam Link, select the PC from the list and enter the PIN code.

For optimal performance:

⚠️ Attention: Steam Link does not support DRM-protected content (for example, films from Netflix or Disney+ in the browser). To do this, use Miracast or HDMI.

How to reduce latency in Steam Link?

1. Connect your PC to the router via cable (even if the TV is via Wi-Fi).

2. In the Steam Link settings, select Delay priority instead of Quality Priority.

3. Turn off V-Sync in games - this will reduce input lag.

4. Use a router with support QoS (Quality of Service) and prioritize Steam traffic.

5. Screen Expanding Apps: When Standard Tools Aren't Enough

If the built-in protocols (Miracast, AirPlay) are not suitable - for example, you need expand the desktopIf you need to use a specific application rather than duplicate it, or if you need support for specific applications, third-party programs will help. We tested the five most stable solutions:

• 🖥️ SpaceDesk (Windows → Android/TV) — allows you to use your TV as a second monitor. Free for basic features, but the TV plugin costs about $10.
• 📱 ApowerMirror (Android/iOS → TV) — supports control from TV (mouse/keyboard), but there is a watermark in the free version.
• 🎮 Moonlight (PC → TV) - similar to Steam Link, but for any games (including Epic Games And Ubisoft Connect).
• 🌐 Chrome Remote Desktop — if you don't need streaming, but full remote access to your PC.
• 🍎 Duet Display (macOS/iOS → TV) - optimized for Apple, but requires purchase (~$10).

For example, SpaceDesk is configured like this:

1. Download the server part to your PC from official website.
2. Install the client on your TV (available in Google Play For Android TV or as an APK for Samsung Tizen).
3. On your PC: Find the SpaceDesk icon in the system tray → Connect → select TV.
4. In Windows display settings (Win + P) select the mode Expand.

The main drawback of such programs is network performance dependence. For example, ApowerMirror upon resolution 1080p consumes up to 100 Mbps, A Moonlight may require up to 150 Mbps For 4K. If the router is weak, the picture will be blurry.

6. Problems and their solutions: why the image lags or is not full-screen

Even with proper setup, problems can still arise. We've compiled the most common ones and how to fix them:

If the TV does not support Miracast/AirPlay, but he has Android TV or Google TV, can be used Chrome Cast (built in Google Home). To do this:

1. Install Google Home on your smartphone.
2. Add your TV as a device for casting.
3. In applications (eg YouTube) click the icon Cast and select TV.

⚠️ Warning: On TVs Samsung With Tizen (until 2020) desktop duplication may not work through Smart View — media files only. For full screen access, use TeamViewer QuickSupport (but there will be high latency).

7. Wi-Fi Alternatives: When Wireless Isn't Enough

If all attempts to connect via Wi-Fi result in lag or poor quality, consider alternatives:

• 🔌 HDMI cable — the most stable solution for 4K@120Hz or professional work (e.g. video editing).
• 📡 WiGig (60 GHz) - wireless technology with a throughput of up to 7 Gbps, but requires a special adapter (for example, Intel Wireless Docking).
• 🔄 Powerline adapters — transmitting a signal through electrical wiring. Suitable if the router is far from the TV.
• 🖥️ Mini-PC on Android/Windows (For example, NVIDIA Shield or Minisforum UM690) - connects to TV via HDMI and is controlled remotely.

For example, WiGig allows you to transmit 4K@60Hz without compression, but the range is only 5-10 meters within line of sight. Adapters cost from $100, but for professionals (designers, gamers) this is justified.

If you need it expand the screen temporarily (for example, for a presentation), and Wi-Fi is lagging, use USB-C to HDMI adapter for laptop. Modern MacBook Pro And Windows Ultrabooks support output 4K@60Hz through one cable.

FAQ: Answers to Frequently Asked Questions

Is it possible to extend the screen to a TV via Wi-Fi if I have Windows 7?

No, Miracast Officially supported only in Windows 8.1 and newer. For Windows 7, you can use third-party programs like AirParrot or Mirroring360, but they're paid and can have high latency. An alternative is to upgrade to Windows 10/11 or use HDMI.

Why is there no sound when connecting via Miracast?

The problem may be with the audio output settings. On Windows:

1. Click Win + I → System → Sound.
2. In the section Conclusion Select your TV (it should appear as a separate device).
3. If it is not there, update your sound card drivers (especially if you have Realtek).

On Android, check if the mode is enabled Video only in the duplication settings.

How to reduce lag when playing games via Steam Link?

Latency depends on three factors: network, PC, and TV. Optimization:

• Connect your PC to the router via cable (even if TV is via Wi-Fi).
• In Steam Link settings, select Delay priority and reduce the bitrate to 30 Mbps.
• On PC, turn it off V-Sync in games and turn on the mode Game in Windows settings (Settings → Games → Game Mode).
• Use a router with support QoS and prioritize Steam traffic.

The minimum possible delay is about 10-15 ms (under ideal conditions).

My TV doesn't support Miracast. What should I do?

There are several workarounds:

• Buy Miracast adapter (For example, Microsoft Wireless Display Adapter or ScreenBeam). It connects to the TV's HDMI port and adds Miracast support.
• Use Google Chromecast or Amazon Fire TV Stick - they support screen mirroring through Google Home or Fire TV.
• For Windows: Install AirParrot or Mirroring360 - They emulate Miracast over Wi-Fi.
• For Android: Try it ApowerMirror or TeamViewer QuickSupport (but there will be a delay).

Is it possible to extend the screen to a TV via Wi-Fi from a MacBook?

Yes, but with some reservations:

• If the TV supports AirPlay 2, you can use it as a second screen in the mode Expand (System Preferences → Monitors).
• If there is no AirPlay, install it. Duet Display or AirServer on TV (if it's on Android TV).
• Older MacBooks (pre-2018) may require an adapter. USB-C → HDMI.

Please note: macOS does not support Miracast, so alternatives are limited.