Modern technology has long since eliminated the unnecessary wires that cluttered home appliances just a decade ago. Today, you can stream your laptop screen or watch a movie from your PC's hard drive to a big-screen TV in seconds, using only your home wireless network. This isn't just convenient for viewing photo albums; it also creates a home theater experience without the hassle of installing HDMI cables.
There are several proven methods for accomplishing this task, each of which has its own characteristics depending on your computer's operating system and the TV's firmware version. Wireless data transmission Requires a stable router signal, so make sure both devices are within range before setting up. In this article, we'll cover the basic protocols and step-by-step instructions to help you get high-quality, lag-free video.
To get started, you don't need any special adapters or external receivers if your TV supports the function. Smart TVMost modern models from Samsung, LG, Sony, and other manufacturers already have built-in modules for receiving multimedia content. The main requirement is that the computer and TV must be connected to the same Wi-Fi network; otherwise, the devices simply won't "see" each other in the local area.
Wireless streaming technologies: DLNA, Miracast, and AirPlay
Understanding the differences between the major data transfer protocols will help you choose the most appropriate method for your situation. DLNA (Digital Living Network Alliance) is a standard that allows for the sharing of media files between devices on the same network. It's ideal if you simply want to play a movie or music stored on your hard drive without duplicating your entire computer desktop.
Unlike DLNA, the technology Miracast Provides screen mirroring. This means the TV becomes a second monitor for your PC, displaying everything that's happening on your desktop, including the mouse cursor and open browser windows. The standard Wi-Fi Direct, which creates a direct connection between devices, bypassing the router, which reduces signal latency.
- 📺 DLNA: The best choice for watching videos and listening to music without putting a strain on the system.
- 🖥️ Miracast: Ideal for displaying presentations, photos or games with minimal latency.
- 🍏 AirPlay 2: An Apple protocol that allows Mac and iPhone owners to stream content to compatible TVs.
⚠️ Note: The AirPlay protocol is natively supported only by Apple devices, but many modern TVs (Samsung, Sony, Vizio) have built-in AirPlay 2 support, which allows you to use them with a Mac without additional set-top boxes.
The choice of technology depends directly on your goals. If you plan to simply watch downloaded movies, DLNA will be less demanding on your computer's resources. Gaming or working with interfaces will require a more powerful connection, as provided by Miracast. It's important to note that some older TV models may not support new encryption standards, requiring the use of middleware.
Preparing equipment and setting up the network
Before starting software configuration, you need to ensure that the physical layer of the network is working correctly. Broadcast quality directly depends on the channel's bandwidth and the absence of interference. Ideally, both devices should be connected to a router operating within the same range. 5 GHz, which provides higher data transfer rates compared to the 2.4 GHz frequency.
Make sure your TV's Smart TV function is enabled and it's logged into your home Wi-Fi network. Your computer's network adapter should also be active. In some cases, antivirus software or Windows Firewall can block the detection of devices on your local network, so if you experience problems, it's worth temporarily disabling them or adding exceptions.
☑️ Checking connection readiness
Pay special attention to updating the wireless adapter drivers on your computer. Outdated software may not work correctly with new WPA3 encryption standards or video transmission protocols. Go to Device Manager and check the network adapter's status, downloading the latest version from the manufacturer's website if necessary.
Mirroring your screen in Windows 10 and 11 using Miracast
Windows operating systems have a built-in projection feature based on the Miracast standard. This allows you to display images on a TV without installing third-party software. To launch, press the following key combination. Win + K on the keyboard, and the "Connection" panel will appear on the right. The system will begin searching for available wireless displays within range.
If your TV doesn't appear in the list, check its settings. On Samsung models, this feature may be called "Screen Casting," on LG models it may be "Screen Share," and on Sony models it may be "Screen Mirroring." You'll need to manually launch the appropriate app on your TV to put it into connection standby mode. After selecting the device in the list on your PC, you may be asked to confirm the connection using your remote control.
⚠️ Note: TV interfaces may vary from manufacturer to manufacturer. If the standard search doesn't yield any results, refer to your model's manual to find the exact name of the wireless connection function in the menu.
Once the connection is successful, you can select the operating mode. Click Win + Pto open the project menu. Options include "Computer Screen Only," "Duplicate" (copy), "Extend" (second monitor), and "Second Screen Only." The "Extend" mode is especially useful, as it allows you to use your TV to watch videos while you work on your laptop.
Troubleshooting cursor lag
If your mouse cursor moves with a noticeable delay, try lowering your output resolution. Go to Settings → System → Display and select a lower resolution for your TV, such as 1280x720 instead of 1920x1080. This will reduce the load on your Wi-Fi channel.
Using a DLNA media server to play files
If you want to play video files stored on your hard drive, DLNA is the most effective method. In Windows 10 and 11, this feature is built into the standard Media Player app or accessible via the File Explorer context menu. You don't need to copy the files to a flash drive; simply share the folder over the network.
To set this up, open Windows Settings, go to Network & Internet, and find Sharing Options. Turn on network discovery and file sharing. Then, in the Media Browser app, click the Stream button and select Automatically allow devices to play my media. The TV should appear in the list of allowed devices.
Now you can open the movie folder in File Explorer, right-click the file, select "Play on Device," and select your TV. The video will start automatically, and playback controls (pause, rewind) will be available from both the remote and your computer.
| Parameter | Description | Recommendation |
|---|---|---|
| Video format | Supported codecs | MP4, MKV, AVI (depending on TV) |
| Permission | Maximum quality | Up to 4K (with TV support) |
| Subtitles | External files | SRT format (UTF-8 encoding) |
| Audio tracks | Multichannel sound | Dolby Digital, DTS |
Broadcast via Google Chrome browser and Chromecast
Owners of Chromecast-enabled TVs or Chromecast boxes can use the Google Chrome browser to cast tabs or the entire desktop. This method is universal and works on Windows, macOS, and Linux. First, make sure your browser is updated to the latest version and click the three-dot menu in the upper-right corner.
Select "Cast" from the drop-down list. The browser will prompt you to select a source: you can cast a specific tab, the entire screen, or a specific file. Selecting "Full Screen" will turn your TV into a fully functional wireless monitor. This method is often more stable than the built-in Miracast in Windows, especially if the router is located far from the receiver.
- 🌐 Tab: Broadcasts only the contents of one browser tab, convenient for YouTube or online cinemas.
- 💻 Screen: Duplicates the entire desktop, including the taskbar and other open programs.
- 📁 File: Direct playback of video file from hard drive via browser interface.
It's important to note that streaming via Chrome puts a strain on your computer's processor, as it's responsible for encoding the video stream in real time. If your computer is underpowered, you may experience choppy video or out-of-sync audio. In this case, it's best to use hardware-based methods or DLNA.
Third-party programs and alternative solutions
When standard operating system tools don't work or their functionality isn't sufficient, specialized applications come to the rescue. One of the most popular solutions is the program PlexIt turns your computer into a powerful media server with a beautiful interface, automatically loading movie covers, descriptions, and cast lists.
Another option is to use the utility AirServer or LetsView, which emulate an AirPlay or Miracast receiver on a computer, allowing for more flexible signal transmission and reception. For low-latency game streams, consider this technology. Steam Link, which allows you to stream games from your PC to your TV, using it as a second screen.
⚠️ Warning: When installing third-party software, download distributions only from the official developer websites. Using cracked versions may result in network instability or personal data leakage.
Don't forget about using an HDMI cable as a backup. Although this article focuses on Wi-Fi, a wireless connection may not be stable enough to watch video at maximum bitrates (for example, 4K HDR 60 fps). In such cases, a cable remains the most reliable solution, ensuring perfect picture quality.
Why can't the TV see the computer via Wi-Fi?
Most often, the problem stems from different networks: make sure both devices are connected to the same router (not a guest network). Also, check your Windows Firewall settings, as this may be blocking detection. In rare cases, rebooting the router and resetting the TV's network settings may help.
Can you play games on TV via Wi-Fi?
Yes, but quality depends on network speed. For fast-paced shooters, input lag can be critical. For more sedate strategy or card games, streaming via Miracast or Steam Link is quite comfortable, especially when using the 5 GHz frequency.
The video is lagging while streaming, what should I do?
Reduce the video quality in the player settings or lower the output resolution in Windows. Make sure there are no strong sources of interference (microwaves, baby monitors) near the router. If possible, connect the TV to the router via a LAN cable while leaving the computer on Wi-Fi, or vice versa.
Do you need internet to stream video from your computer?
No, internet access is not required. All devices need to be connected to the same router (local network). DLNA and Miracast work within the local network, so you can watch downloaded movies even without internet access.