Modern technologies allow you to transform any TV with the function Smart TV into a full-fledged multimedia center, eliminating the need to run long HDMI cables across the room. Wireless image transmission has become the standard, providing high-definition images without lag, which is especially important for watching 4K movies or giving presentations in the office. Users often look for a way to mirror their PC screen to a TV via WiFi to enjoy content on the big screen with maximum comfort.
There are several proven connection methods, each with its own characteristics and equipment requirements. The main technologies here are the standard Miracast, protocol DLNA and proprietary solutions from Microsoft and Google. The specific method you choose depends on your computer's operating system version, TV model, and desired data transfer quality. In this article, we'll cover all the current setup options in detail.
It's important to understand that for a stable wireless connection, both devices must be on the same local network. This means both your laptop and smart TV must be connected to the same network. routerIf you're using mobile internet on a PC or a guest network, the connection may fail or work with errors.
Wireless Video Streaming Technologies: Miracast vs. DLNA
Before you begin setting things up, it's important to understand the fundamental differences between the major media transfer protocols. Miracast is a technology that allows you to broadcast your screen image in real time, creating a mirrored copy of what's happening on your computer monitor. It works on the principle of Wi-Fi Direct, allowing devices to connect directly, even without a router, although the presence of a shared network often simplifies detection.
Unlike Miracast, the protocol DLNA (Digital Living Network Alliance) is primarily designed for streaming existing files: videos, music, and photos. You can't simply "spin" your Windows desktop onto your TV via DLNA, but you can launch a movie from a folder and control playback. This method is less demanding on Wi-Fi speeds because data is buffered in advance.
⚠️ Attention: Some older TV models may support DLNA but lack built-in Miracast support. In this case, screen mirroring will require additional software solutions or external adapters.
For Windows 10 and 11 users, Miracast is the most relevant technology, as it's built into the system at the kernel level. This ensures better compatibility and lower input lag, which is critical if you plan to not only watch videos but also interact with the interface. However, connection quality directly depends on the power of your device. Wi-Fi module and signal level.
Equipment preparation and compatibility testing
The first step in the setup process is a thorough hardware check. Make sure your TV supports the wireless display feature. This option may be listed differently in your TV menu: Screen Share, Smart View, Wireless Display or simply MiracastIf your TV is several years old, you may need to purchase an external set-top box, such as a Chromecast or Android TV Box.
There are also requirements on the computer side. For the native Windows feature to work, a Wi-Fi adapter supporting Wi-Fi Direct technology is required. Most modern laptops and PCs with external USB adapters meet this requirement. You can check for support via the command line by entering the command netsh wlan show driver and find the line "Hosted network supported".
Connection stability is key to success. If the router is in another room or behind thick walls, artifacts on the screen or audio desync may occur. Ideally, both devices should be within line of sight or no more than 5-7 meters from the access point.
Setting up a connection using built-in Windows tools
The easiest way to mirror your PC screen to your TV via Wi-Fi doesn't require any additional software if you're running Windows 10 or 11. The system has a built-in "Connect" app that activates the Miracast protocol. First, make sure your TV is turned on and waiting for a connection (often you need to launch the "Cast" app or a similar one on the TV itself).
On your computer keyboard, press the key combination Win + KThe "Connection" panel will open on the right, where the system will begin searching for available devices. After a few seconds, your TV should appear in the list. Click it, and after a short pairing process, the monitor's image will be mirrored on the larger screen.
Projection modes are controlled via the menu. Win + PFour options are available: "Computer Screen Only," "Duplicate" (a copy), "Extend" (the TV becomes a second monitor), and "Second Screen Only" (the PC monitor turns off, and only the TV is active). The "Extend" mode is especially convenient for work, allowing you to keep your work windows on your laptop while displaying videos or presentations on the TV.
☑️ Windows Connection Checklist
Sometimes, when connecting for the first time, the system may ask for access permission. A PIN code may appear on the TV screen, which you must enter on your computer, or a confirmation prompt, which you must accept with the remote control. If the device is not found, try updating the wireless adapter drivers through Device Manager.
Using the Projector to This PC app
In some cases, a standard connection may not work due to security restrictions or network settings. Windows has an alternative method that turns your computer into a receiving device, but for our purposes (PC -> TV), it's more important to know how to activate the search if the automatic connection doesn't work. However, if your TV is older and doesn't support Miracast, you can use your PC as a media server.
To set up media streaming (DLNA) in Windows, you need to set up sharing. Go to Control Panel → Network and Internet → Network and Sharing Center → Streaming media settingsTurn on streaming and select your TV from the list of allowed devices.
After activating this function, opening any video file in a standard player (for example, Windows Media Player or VLC), you'll see the "Cast to Device" button. Selecting your TV will start playing the file on the big screen. Your computer will act as a server in this case, and its screen won't be streamed, only the file's contents.
| Parameter | Miracast (Broadcast) | DLNA (Streaming) | HDMI (Cable) |
|---|---|---|---|
| Transmission type | Real-time screen | Media files only | Real-time screen |
| Delay | Low/Medium | None (buffering) | Absent |
| Quality | Depends on Wi-Fi | Original (uncompressed) | Original (uncompressed) |
| Convenience | High (wireless) | Average | Low (requires cable) |
What to do if the TV doesn’t see the computer?
Make sure "AP Isolation" is disabled on your router. This setting prevents devices on the network from seeing each other, which prevents Miracast and DLNA from working. Also, check if your antivirus software is blocking Wi-Fi Direct frequencies.
Third-Party Broadcasting Software: When On-Demand Resources Are Insufficient
If built-in Windows tools don't work, or your TV runs on a specific OS (for example, older Samsung or LG models), third-party apps can help. One of the most popular solutions is LetsView or AirServerThese programs create a virtual bridge between devices, often offering more flexible quality and latency settings.
For users of the Google Chrome ecosystem, the built-in "Cast" feature is a great option. If your TV is equipped with Chromecast or there is built-in Chrome Cast support, you can right-click on the desktop (in some launchers) or in the Chrome browser, select the "Cast" menu.
In the Chrome browser, go to the menu (three dots in the corner) → Save and Share → Broadcast...In the window that opens, select "Sources" → "Cast Desktop." This will stream your entire system to your TV via the Google Cast protocol. This method is especially useful for web presentations and watching online videos.
⚠️ Attention: When using third-party software, make sure you download programs only from the developers' official websites. Versions from untrusted sources may contain malware that steals your Wi-Fi network data.
Another powerful tool is OBS StudioAlthough it's a streaming program, it allows you to create a virtual camera or use a plugin to output the image to the network, which can be used for complex broadcasting scenarios, such as overlaying a webcam on your desktop.
Problem solving and quality optimization
Even with a perfect setup, users may encounter issues: choppy video, out-of-sync audio, or a complete loss of signal. Most often, this is due to a congested Wi-Fi channel. If neighbors also have powerful routers, they may be clogging up the airwaves. In this case, changing the channel in the router settings to a less congested one (for example, 1, 6, or 11 for 2.4 GHz) can help.
Sound issues often need to be resolved manually. After connecting to a TV, sound may still come through the laptop speakers. To fix this, click the speaker icon in the Windows tray, select the output device, and switch to your TV (usually listed as the TV model or "Intel/Realtek Digital Output").
If the image appears blurry, check your screen resolution. Windows sometimes sets a non-standard resolution when connected via Wi-Fi. Right-click on the desktop → Screen parameters and select the recommended resolution, usually it is 1920x1080 or 3840x2160 (4K) at a frequency of 60 Hz.
In rare cases, antivirus software may block the connection. Try temporarily disabling the firewall or adding the Projector app to the exceptions. Also, make sure your graphics card drivers (NVIDIA, AMD, Intel) are up to date, as they are responsible for encoding the video stream before sending it over the network.
Frequently Asked Questions (FAQ)
Is it possible to connect a computer to a TV without a router?
Yes, this is possible thanks to Wi-Fi Direct technology used in Miracast. The computer and TV create a direct connection between each other, bypassing the router. However, for the initial handshake to work, both devices must have a shared network or at least enabled Wi-Fi.
Why is there a delay in sound when streaming video?
Audio lag (desync) occurs because a video stream requires more time to encode and transmit than an audio stream. Player settings (such as VLC or MPC-HC) have an "Audio Sync" feature where you can manually add a delay in milliseconds to align lips and voice.
Does screencasting affect internet speed?
Yes, streaming over Wi-Fi takes up a significant portion of your bandwidth. If you're watching 4K video from your PC on your TV, the download speeds of other devices on the network may drop. It's best to use a separate 5 GHz network for gaming or work.
Does Mac OS support connecting to Windows PC for streaming?
Mac OS doesn't natively support Miracast. Connecting a MacBook to a Windows PC requires installing third-party software, such as AirServer on the PC, which emulates AirPlay reception, or using intermediary apps.