Modern technology allows you to completely eliminate unnecessary cables and enjoy content on a large screen without the hassle of HDMI cables. Streaming from a laptop or desktop PC to a Smart TV has become standard for watching movies, presentations, and even working. A wireless connection provides sufficient bandwidth for transmitting high-resolution video, including 4K, provided the network is configured correctly.
There are several main protocols used for video signal transmission: Miracast, DLNA, Google Cast, and Apple AirPlay. The specific method you choose depends on your computer's operating system, TV model, and available software. Connection stability directly affects image quality and the absence of delays, so it is important to understand the differences between the technologies before starting the setup.
In this article, we'll cover all current connection methods in detail, address common errors, and help you choose the best option for your setup. You'll learn how to activate hidden features in Windows, set up repeater support for macOS, and use third-party apps for older TV models. Just make sure both devices are on the same local network before proceeding.
Basic technologies for wireless video transmission
To successfully stream, you need to understand which protocol your TV and computer support. The most universal standard for Windows and Android devices is MiracastThis technology allows for direct video and audio streaming using WiFi Direct, meaning it can be used even without a router if the TV supports a direct connection. However, for stable 4K performance, it's best to use a full-fledged home network via a router.
The second popular method is DLNAIt doesn't broadcast the entire desktop, but allows you to open media files (photos, videos, music) on your TV, controlling playback from your computer. This is convenient for watching pre-downloaded movies, but isn't suitable for sharing a browser or games. The protocol is built into most Smart TVs and media players.
Apple technology owners use technology AirPlay, which ensures high-quality streaming and minimal latency. A TV with AirPlay 2 support or an Apple TV is required. Google ecosystem users often use the built-in Chromecast feature, which allows you to cast a Chrome browser tab or the entire screen to your TV.
- 📡 Miracast — full screen mirroring for Windows and Android devices.
- 🎬 DLNA — transfers only media files over the network.
- 🍏 AirPlay is the native protocol for Apple devices.
It's important to note that your router's bandwidth plays a key role. If your router only operates in the 2.4 GHz band, you may experience lag when streaming heavy video. For a comfortable experience, we recommend dual-band router with support for the 5 GHz standard.
⚠️ Please note: Using Miracast places a strain on your computer's processor and WiFi module. Older laptops may not be able to handle real-time video encoding, resulting in choppy video.
Preparing equipment and network
Before proceeding with the software configuration, it is necessary to ensure the correct physical network configuration. It is critical that the computer and TV are connected to the same local networkIf you have a dual-band router, make sure both devices are connected to the same frequency (either both to 2.4 GHz or both to 5 GHz), although modern routers can correctly route traffic between bands.
Check the WiFi module status on your TV. Some models disable the network adapter when it goes into standby mode to save power. You may need to enable the "Quick Start" or similar option in your TV's energy saving settings to ensure it's always online and discoverable.
It's also worth updating the drivers for your computer's wireless adapter. Manufacturers often release updates that improve the stability of the Miracast protocol. Go to Device Manager, find your network adapter, and check for updates through the manufacturer's website or your system manager.
- 🔌 Make sure both devices are on the same subnet.
- 🔄 Update your TV firmware through the settings menu.
- 🚀 Switch your router to 802.11ac or ax (WiFi 5/6) mode.
If you're using a guest WiFi network or a corporate network with client isolation, wireless streaming won't work. In these cases, devices can't physically see each other due to the router's security settings.
Screencasting in Windows 10 and 11 (Miracast)
Windows 10 and 11 operating systems have a built-in "Projection" feature, which is based on the Miracast standard. This is the easiest way to display an image without installing additional software. First, make sure the signal reception function is activated on your TV. In the Smart TV menu, it may be called Screen Share, Miracast, Wireless Display or simply "Broadcast".
On your computer, press the key combination Win + KThe "Connection" panel will appear on the right, where the system will search for available devices. If your TV is in connection standby mode, it will appear in the list. Click on your TV's name, and after a few seconds, the desktop image will appear on the big screen.
☑️ Check before connection
Once successfully connected, you can change the operating mode. Click Win + Pto select a mode: "Duplicate" (a copy of the screen), "Extend" (a second monitor), or "Second Screen Only" (the laptop turns off and only the TV is on). Extend mode is especially useful for presentations, allowing you to see notes on the laptop while the audience views the slides.
In the project settings (Settings → System → Project to this PC) you can configure the computer's visibility to other devices if you want to broadcast an image on this computer, not With him. PIN settings for security are also available here.
⚠️ Note: The Projection feature in Windows may not work if the Windows Connection Manager service is disabled or if your graphics card does not support H.264 hardware encoding.
You can use the registry or group policies to fine-tune the quality of the streamed image, but in most cases, the default settings are sufficient. If your mouse cursor is slow to move, try lowering the screen resolution in Windows before streaming.
Using the Connect to TV app
Windows 10 and 11 have a dedicated system app called "Connect to TV." It serves as an interface for receiving and sending Miracast signals. If the standard menu (Win+K) doesn't work, try launching this app directly from the Start menu search.
The app lets you manage session parameters. In its settings, you can change the computer name that the TV sees and the PIN requirements. This is a useful feature if you're in a public place or office where many devices are connected to your network.
If the app doesn't launch or returns an error, the feature may not be installed. In Windows 10/11, you can add it via Settings → Apps → Optional Features → Add Feature. Find "Wireless Display" in the list and install it.
- 🖥️ Launch via search for "Connection".
- ⚙️ Set up PIN requirements for security.
- 🛠️ Install the Wireless Display component if it is not present.
It's worth noting that this application also allows you to turn your computer into a signal receiver if you have a second laptop or phone from which you need to display an image.
Broadcast via Google Chrome (Chromecast)
If your TV has built-in Android TV or Chromecast support, the most reliable way to stream is using the Google Chrome browser. This method is often more stable than the system Miracast, especially when streaming video from the internet.
Open the Chrome browser on your computer. Click the three dots in the upper-right corner of the menu and select Broadcast... (Cast). The browser will search for available devices on the network. You can choose to cast a specific tab, the entire desktop, or an audio file.
When you select the "Desktop Casting" option, the system will ask you to select a window or the entire screen. This is a great option for sharing programs that don't support other protocols. Image quality adapts dynamically depending on network speed.
Why is video lagging in Chrome?
Delays are often caused by low RAM or WiFi congestion. Try closing unnecessary tabs and lowering the video quality on the source.
The advantage of the Chrome method is its cross-platform compatibility. You can cast your screen from Linux, macOS, or Windows to any TV that supports the Google Cast protocol. No additional drivers are required, just a browser installed.
You can use your phone as a remote control to control playback if you're both signed in to the same Google account. This adds an extra layer of convenience to your viewing experience.
Connecting macOS and Apple AirPlay
Mac users have access to AirPlay technology, which provides superior picture and sound quality. This feature requires an AirPlay 2-enabled TV (many Samsung, LG, Sony, and Vizio models released after 2019) or an Apple TV.
In the macOS taskbar (in the upper corner), find the "Screen Mirroring" icon (two rectangles). Click it and select your TV from the list. If you don't see the icon, go to System Preferences → Displays and add AirPlay control.
AirPlay not only allows you to mirror your screen but also use your TV as a separate monitor. You can arrange the windows in the display settings to suit your needs. The system automatically adjusts the resolution and refresh rate to the TV's capabilities.
| Parameter | Miracast (Windows) | AirPlay (macOS) | Chromecast |
|---|---|---|---|
| Delay | Average | Low | Depends on the network |
| Quality | Up to 1080p/4K | Up to 4K HDR | Up to 4K |
| Sound | It is transmitted | It is transmitted | It is transmitted |
| Complexity | Low | Low | Average |
It is important to ensure good WiFi speed, as AirPlay uses a significant portion of the channel's bandwidth to transmit uncompressed or lightly compressed video stream.
⚠️ Note: TV interfaces and operating systems are updated regularly. The location of menu items may vary depending on your device's firmware version. Always consult the manufacturer's official documentation if you can't find the option you need.
Troubleshooting and diagnostics
Despite technological advances, wireless streaming can still encounter problems. The most common one is that the computer doesn't recognize the TV. First, check whether DLNA or Screen Mirroring is enabled in the TV's settings. Sometimes it needs to be activated manually through the app list.
The second common problem is audio and video desynchronization. This is often resolved by rebooting the router and both devices. Also, try disabling your antivirus or firewall on your computer during the test, as they may be blocking ports required for media traffic.
If all else fails, use an HDMI cable as a temporary solution or purchase a WiFi adapter for your TV if the built-in module isn't working properly. External adapters often have more powerful antennas.
- 🔍 Check if your antivirus is blocking the connection.
- 📡 Make sure that the devices are not separated by the guest network.
- 🔄 Restart your router and reset network settings.
In some cases, resetting Windows network settings can help. Open a command prompt as administrator and enter the command netsh winsock reset, then restart your computer.
Questions and Answers (FAQ)
Is it possible to stream a screen if the TV is not Smart?
Yes, you'll need to purchase an external set-top box, such as a Google Chromecast, Apple TV, or Android TV box with Miracast support. It plugs into the HDMI port of a standard TV and adds Smart TV functionality, allowing you to stream content over WiFi.
Why is there no sound during the broadcast?
Most likely, your computer speakers, not your TV, are selected as the audio output device in Windows or macOS. Click the volume icon in the system tray and select your TV from the list of playback devices (usually listed by TV model or brand).
Does broadcasting affect internet speed?
Yes, streaming high-definition video puts a strain on your local network. If your router is weak or your WiFi is overloaded, internet speeds on other devices may temporarily drop, even though the traffic is sent to the global internet separately.
How to remove mouse cursor lag?
Lag is inevitable with a wireless connection, but it can be minimized. Use the 5 GHz band, close background downloads on your PC, and select "Second Screen Only" in Windows projection settings to avoid wasting resources rendering images on your laptop.
Does streaming work through a router with guest mode?
Usually not. Guest networks isolate devices from each other for security reasons. The computer and TV simply won't "see" each other. To stream, you need to connect to the main WiFi network.