It's hard to imagine modern digital entertainment without a large screen, whether it's watching high-definition movies or sharing presentations with colleagues. Wired HDMI connections are often inconvenient, restrict movement, and create visual noise, especially if signal source The monitor is located far from the receiver. This is why the question of how to mirror a monitor to a TV via WiFi is becoming one of the most pressing issues for smart device owners.
Wireless video streaming technologies have come a long way from lagging images to full-fledged 4K streaming with minimal latency. Today, several standards exist, such as Miracast, AirPlay, and DLNA, allowing you to stream from virtually any device. Understanding how they work and the nuances of setting them up will help you avoid common mistakes and enjoy your content without any complications.
Before moving on to specific instructions for different operating systems, it's important to make sure your hardware is ready to go. RouterThe TV and computer must be on the same local network, as the router is where data transfer occurs. It's also worth noting that transmitting high-quality audio and video requires a stable communication channel, so using a frequency 5 GHz preferable to the congested 2.4 GHz band.
Technical requirements and equipment preparation
The foundation for successful synchronization is proper hardware preparation. First, make sure your TV supports the function. Smart TV or a suitable media player, such as an Apple TV, Chromecast, or Android TV box, is connected to it. Older TV models without network protocol support will not be able to receive the video stream directly and will require the use of adapters.
The second critical component is the router. To transmit a heavy video signal without artifacts and latency, the router must support at least Wi-Fi 4 (802.11n), and ideally Wi-Fi 5 (802.11ac) or Wi-Fi 6. If the devices are on different subnets or client isolation mode is enabled, the connection will fail.
⚠️ Important: If your router broadcasts two networks (2.4 GHz and 5 GHz) with different names, be sure to connect both your computer and TV to the same frequency. Band mismatches often result in devices simply not "seeing" each other in the list of available displays.
It's also worth checking for software updates on both devices. Manufacturers frequently release patches that improve protocol stability. Miracast And AirPlayGo to your TV's system settings and find the software update section to rule out issues caused by bugs in the old firmware.
☑️ Checking connection readiness
Streaming from Windows 10 and 11: Built-in Tools
Microsoft operating systems offer native support for wireless displays, eliminating the need to install third-party software. MiracastBuilt into Windows, it's easy to clone your screen or extend your desktop onto your TV. To get started, press the key combination Win + K on the keyboard, which brings up the "Connection" sidebar.
If your TV is in pairing mode, it should appear in the list of available devices. Depending on your TV model, you may need to confirm the connection using the remote control. Once paired, the system will automatically select the optimal resolution, although you can adjust it manually through the menu. Settings → System → Display.
In some cases, the graphics card driver may not work correctly with the wireless protocol. If the connection is interrupted or the image is choppy, try updating your graphics adapter drivers or, conversely, rolling them back to a previous version. It's also worth checking the WiFi adapter's power settings and disabling the system from turning it off to save power.
What should I do if the "Connect" button is inactive?
If the option to connect to a wireless display is grayed out or missing, your WiFi adapter may not support Miracast or the drivers may not be installed correctly. Try running the following command in the command prompt with administrator privileges: netsh wlan show driver . The "Supports hosted network" line should say "yes."
For users who require low latency, such as for gaming, it's important to note that a wireless connection will always have a higher ping than an HDMI cable. In Windows graphics settings, you can choose to use only the second display, which can sometimes provide a slight performance boost.
Using Google Chrome for Cross-Platform Streaming
When built-in OS tools fail or the TV doesn't support Miracast, a browser comes to the rescue. Google ChromeThis method is universal and works on Windows, macOS, and Linux, allowing you to cast both individual tabs and the entire screen via built-in or external Chromecast technology.
To start the broadcast, open your browser, click on the three dots in the upper right corner and select Broadcast... (Cast). In the menu that opens, you can select the source: the current tab, the entire desktop, or a specific file. This is especially convenient if you need to show the contents of a folder or launch an application that doesn't support standard protocols.
- 📺 Tab: transmits the contents of only one open browser tab, the sound is transmitted automatically.
- 💻 Full screen: duplicates everything that happens on the monitor, including system notifications and other programs.
- 📁 File: Allows you to select a video file or photo from your hard drive to play on your TV.
Image quality when streaming through a browser directly depends on the processor's power, as the video stream is encoded using software. On low-end laptops, this can cause system lag. Furthermore, when streaming the entire screen, computer audio may not be streamed by default, requiring separate speakers or an HDMI cable for audio.
Connecting Apple devices: AirPlay and macOS
Apple device owners enjoy an ecosystem where screen mirroring is implemented in the most convenient way possible through the protocol AirPlayIf you have a TV with built-in AirPlay 2 support (many recent Samsung, LG, and Sony models) or an Apple TV set-top box is connected, the process takes seconds.
On macOS, simply click the "Control Center" icon in the menu bar (the two switches) and select "Screen Mirroring." The system will search for available devices on the network. It's important that your TV is enabled for requests: typically, when you first connect, a four-digit code will appear on the TV screen, which you'll need to enter on your computer.
Unlike Miracast, AirPlay provides a smoother picture and is better optimized for high-latency networks, but it is more bandwidth-intensive. If you're using a router with client isolation or a guest network, streaming may fail, as devices must have direct access to each other.
| Parameter | Miracast (Windows) | AirPlay (Apple) | Chromecast (Browser) |
|---|---|---|---|
| Latency | Average | Low | High |
| Sound transmission | Yes | Yes | Depends on the source |
| TV requirements | Smart TV / Adapter | AirPlay 2 / Apple TV | Chromecast / Browser |
| Stability | Depends on the drivers | High | Depends on the CPU |
Troubleshooting connection and latency issues
Even with a perfect setup, users may encounter issues: audio and video desync, image artifacts, or a complete connection loss. Most often, this is due to radio channel congestion from neighboring routers. In such cases, changing the WiFi channel in the router settings to a less congested one (e.g., 1, 6, or 11 for 2.4 GHz) can help.
If the image is transmitted, but with a noticeable delay, try lowering the output resolution on your computer. Signal transmission in 4K requires a huge amount of bandwidth, and if the router is old, it may not be able to handle the real-time data flow. Reducing to 1080p often works wonders.
⚠️ Note: Antivirus programs and firewalls on your PC may block incoming connections for broadcast protocols. If all other methods fail, try temporarily disabling the firewall or adding an exception for the "Projector" or "Wireless Display" system service.
It's also worth considering the physical location of the devices. Thick concrete walls or metal structures between the router and TV can significantly weaken the signal. If possible, use a wired connection from the TV to the router via a LAN cable, reserving WiFi for the computer only—this will stabilize the receiving end of the chain.
Alternative methods and third-party applications
When standard methods fail, specialized apps can help. Programs like LetsView, ApowerMirror, or TeamViewer allow for remote access and screen sharing, even across different platforms, such as from Android to iOS TV or vice versa.
Some apps work by creating their own hotspot or using QR codes for quick pairing. This can be useful in an office environment where access to router settings is restricted. However, it's important to remember security: don't connect to unknown public networks to transmit confidential information.
Advanced users can use DLNA-based media servers. Although this protocol was originally designed for file streaming, many modern TV players (such as VLC or MX Player) can stream desktop content if the appropriate server is configured on the PC. This requires more advanced configuration, but offers flexibility in managing codecs and buffering.
Why is there no sound when streaming via WiFi?
The most common issue is that the system's audio output device isn't set to the TV. Go to Windows or macOS sound settings, select the playback device, and select your TV or wireless headset. Also, check that the volume slider on the TV isn't set to zero.
Is it possible to play games over a wireless connection?
For quiet strategy or card games, yes. For fast-paced shooters or fighting games, a wireless connection (Miracast/AirPlay) isn't suitable due to input lag, which can reach 100-200 ms. In such cases, an HDMI cable is necessary.
Does screencasting affect internet speed?
Yes, streaming takes up a significant portion of your WiFi bandwidth. If you're watching 4K video from your computer to your TV, other devices on the network may not have the speed for comfortable surfing or video calls.