Modern multimedia systems eliminate unnecessary cables, transforming the living room into a full-fledged cinema in minutes. Many users wonder how to connect their PC to their TV via Wi-Fi so they can watch high-definition movies or show presentations without the clutter of cables. Wireless technologies have now reached such a level of stability that signal lag is virtually imperceptible to the human eye, ensuring a smooth picture even when streaming 4K video.
There are several proven methods for establishing such a connection, each with its own characteristics and use cases. The choice of a specific method depends on your computer's operating system, the presence of smart features on your TV, and the image quality requirements for the transmitted image. In this article, we'll take a detailed look at native Windows tools, the capabilities of the Miracast protocol, and alternative software solutions.
Before you begin setup, you need to make sure both devices—the computer and the TV—are connected to the same wireless network. This is a fundamental requirement for most streaming technologies to work, as data exchange occurs locally through the router. If the router supports the standard Wi-Fi 5 (802.11ac) or newer, the data transfer speed will be significantly higher, which is critical for large files.
Wireless Streaming Technologies: Miracast vs. DLNA
Understanding the differences between the main data transfer protocols will help avoid confusion when setting up equipment. Miracast — is a technology developed by the Wi-Fi Alliance that allows for real-time screen sharing. It works peer-to-peer or through a router, creating a direct video channel between devices, making it ideal for desktop mirroring.
In contrast, the protocol DLNA (Digital Living Network Alliance) is primarily focused on streaming media content: photos, music, and video files from folders. When using DLNA, the TV acts as a renderer and the computer acts as a server, controlled via the TV remote rather than the PC keyboard. This method is not suitable for gaming or working with the Windows interface, as it cannot stream the entire desktop.
Modern Smart TVs often support both standards, but may call them by different names. For example, Samsung uses the term Screen Mirroring, LG — Smart View, and Sony - Screen SharingIt is important to understand that for Miracast to work, the video card and drivers must support the technology. Intel WiDi or its analogues, which is relevant for most devices released after 2012.
⚠️ Note: If your TV was released more than 7 years ago, it may not natively support Miracast. In this case, you'll need to purchase an external adapter, such as Chromecast or Microsoft Wireless Display Adapter, to stream images wirelessly.
When choosing a method, consider the network load. Miracast places a high load on the Wi-Fi channel because it constantly transmits a video stream. DLNA, on the other hand, sends data only on request and buffers it, making viewing less dependent on the signal quality at the time, but it removes the ability to control the mouse cursor with a remote control.
Equipment preparation and compatibility testing
The first step should always be to diagnose the current state of your network and devices. Make sure Smart TV is enabled on your TV and Wi-Fi is activated. On your computer, check for the presence of the wireless adapter and its drivers, as these are responsible for detecting external displays.
Open Device Manager in Windows and find the "Network Adapters" section. If there's a yellow exclamation mark next to your Wi-Fi module's name, the driver isn't working properly and you won't be able to establish a wireless connection. You should also check if support is enabled. Wi-Fi Direct in the adapter properties, since many systems use this protocol for direct connection.
It's also important to update your TV's firmware to the latest version. Manufacturers regularly release patches that improve the stability of wireless modules and compatibility with new versions of Windows. The update check option can usually be found in the menu. Settings → Support → Software Update.
☑️ Check before connection
If you're using a corporate network or guest Wi-Fi with web page authentication, wireless streaming may not work. Such networks often isolate client devices from each other for security reasons, blocking local data exchange between the PC and TV.
Screencasting in Windows 10 and 11 using built-in tools
Windows operating systems have built-in functionality for connecting to wireless displays, making the process as simple as possible for the user. No additional software installation is required to start broadcasting; simply use the system project menu.
Press the key combination Win + K on the keyboard. The "Connection" panel will open on the right, where the system will begin searching for available devices. If the TV is in connection standby mode, it will appear in the list within a few seconds.
After selecting your TV from the list, a connection confirmation prompt may appear on the TV screen. Use your remote to press "Allow" or "Accept." After this, the desktop image will appear on the big screen, and you can control your computer as usual.
| Projection mode | Description | Best use |
|---|---|---|
| PC screen only | Image only on monitor | Confidential work |
| Recurring | The same picture on both screens | Presentations, films |
| Expand | TV becomes a second monitor | Multitasking, games |
| Second screen only | The PC monitor goes dark, only the TV works | Watching movies, saving resources |
For more fine-tuning of latency and image quality, go to Settings → System → Display → Graphics OptionsHere you can change the power priority for the Connect app to High Performance, which will reduce the likelihood of lag.
Using DLNA to Play Your Media Library
If your goal isn't desktop duplication, but rather comfortable viewing of movies or photo albums, DLNA is a more energy-efficient solution. In Windows, this feature is implemented through "Streaming Media Settings," which allows you to share file libraries for access from other devices.
To activate, open the Control Panel, go to the "Multimedia" section, and click "Enable media streaming." The system will prompt you to select devices that are allowed to access content. Find your TV in the list and set its status to "Allowed."
Once set up, find the Source or Input button on your TV remote and select your computer. The TV interface will allow you to navigate through your PC's hard drive folders, opening video files directly. This is convenient because it transfers complete control to the remote, allowing you to disconnect your computer from the monitor or use it for other tasks.
⚠️ Note: When playing videos via DLNA, subtitles may not display or be out of sync if the file does not contain embedded tracks. For external subtitles (.srt), it's best to use the built-in Smart TV player from a USB drive or specialized software like Plex.
There are also third party servers such as Plex or Jellyfin, which expand the capabilities of standard DLNA. They automatically download movie covers, descriptions, and cast members, transforming your file collection into a beautiful, Netflix-like interface.
Alternative programs and third-party solutions
When standard Windows tools are unstable or your TV doesn't support Miracast, specialized applications can help. One of the most popular solutions is LetsView, which provides a high-quality screen mirroring tool for free.
Another powerful tool is AirServer or ReflectorThese programs turn your PC into an AirPlay receiver, allowing you to display content not only from Windows but also from Apple devices (iPhone, iPad, Mac) to your TV via your computer. This is especially relevant for the Apple ecosystem, which lacks native Miracast support.
Why might third-party programs work better?
Third-party applications often use their own video compression codecs, which are more efficient than the standard Windows libraries. Furthermore, they can force connections even through firewalls, which sometimes block the system's device discovery protocol.
For users who prefer open source, a great option would be KodiBy installing this media center on a TV (if the Android TV OS supports it) or a PC, you can create a complex network with high-quality audio and video passthrough. Kodi also supports add-ons for remote control from a smartphone.
Download programs only from official developer websites to avoid adware. Some free versions may have session time limits or watermarks on the screen.
Troubleshooting and connection optimization
Even with an ideal setup, users may experience image artifacts, audio desync, or connection drops. Most often, the problem stems from radio channel congestion. If there are many neighboring routers operating nearby, the signal can become swamped.
Try changing the Wi-Fi channel in your router settings. Use analyzer apps (such as Wi-Fi Analyzer on your smartphone) to find the least congested frequency channel. Switching from automatic channel selection to a fixed channel often resolves intermittent lag.
- 📶 Make sure the distance between the router and the receiver is minimal, or use a Wi-Fi repeater.
- 🔄 Restart your router if it has been running continuously for more than a week. This will clear the cache and reset errors.
- 🔌 Disable it while downloading torrents or large files on other devices on the network.
- 🎮 For gaming, use the "Second Screen Only" mode to reduce the load on your PC's graphics card.
If the audio lags behind the video, try adjusting the buffering settings in the player app or in the TV settings. TVs often have a "Game" or "PC" mode in the picture settings, which disables unnecessary image post-processing, reducing input lag.
In some cases, antivirus software or Windows Firewall may block the connection. Check your security settings and add your TV or streaming app to the exceptions list. Windows private networks must have a "Private" profile, not "Public," to allow device discovery.
Why doesn't the TV see the computer in the list of devices?
Most often, the problem is with the network profile. Go to Windows network settings, select your connection, and change the network profile from "Public" to "Private." Also, make sure the "DLNA" or "SSDP Discovery Service" service is running in the Windows services list (services.msc).
Is it possible to play PC games via Wi-Fi on TV?
Yes, but with limitations. For fast-paced shooters, a lag of 50-100 ms can be critical. For strategy games, card games, or leisurely RPGs, a Wi-Fi connection is perfectly fine. For the best experience, use a cable or a dedicated 5 GHz Wi-Fi network.
How to transfer sound to the TV if it doesn’t work?
Once connected, click the speaker icon in the Windows system tray (near the clock). In the list of playback devices, select your TV or wireless headset. If the device is not listed, right-click the sound icon and select "Show disabled devices."
Does broadcasting affect internet speed?
When using Miracast or AirPlay for screen mirroring, you may not use any internet connection at all, as data is transferred locally between devices. However, if you stream content from an online cinema (YouTube, Netflix) from your PC to your TV, your data usage is doubled: first to your PC, then to your TV (depending on the transmission method).