Modern technologies make it easy to transform your living room into a true multimedia center, where content from your personal computer can be streamed to a large screen without unnecessary wires. Owners of devices based on Windows 10 and televisions LG Smart TVs have several built-in tools for this task. The most popular methods are using technology Miracast to duplicate a screen or protocol DLNA to transfer specific files.
The setup process requires minimal technical knowledge, but requires certain network infrastructure requirements. The computer and TV must be on the same local network, which is usually achieved by connecting both devices to the same router. Data transfer quality directly depends on speed and stability. Wi-Fi connections, so for viewing high-definition videos, it is recommended to use the 5 GHz standard.
In this guide, we'll cover all available connection methods in detail, from quick hotkeys to fine-tuning network settings. You'll learn how to avoid image lag, which file formats are natively supported, and how to troubleshoot common device detection errors. Proper configuration will allow you to enjoy your content with maximum comfort.
Preparation of equipment and network infrastructure
Before starting setup, you need to make sure your equipment is ready for wireless data transmission. A key requirement is that the computer and TV are on the same subnet. This means both devices must be connected to the same router. If you have a dual-band router, it's best for both devices to operate on the same frequency, although modern routers typically route traffic correctly between the 2.4 GHz and 5 GHz bands.
Check your PC's operating system version. The "Connect" feature in Windows 10 requires current system updates. Also, make sure your TV LG WebOS Smart Share or a similar signal reception service is enabled. Some models require manual activation of connection standby mode in the network settings.
⚠️ Note: Antivirus programs or Windows firewalls may be blocking TV detection. If the devices are unable to see each other, temporarily disable third-party security software or add the network to the trusted list (Private profile).
Connection stability is critical for wireless streaming. If you plan to stream 4K video, make sure your Wi-Fi signal is strong enough. The distance between the router and receiver should be within reasonable limits, as concrete walls can significantly weaken the signal.
- 📡 Make sure both devices are connected to the same Wi-Fi network (same SSID name).
- 💻 Make sure your computer is running Windows 10 version 1511 or later.
- 📺 On your LG TV, go to the menu and make sure the signal reception function is active.
- 🔌 For best performance, we recommend using a router with the 802.11ac (Wi-Fi 5) standard or newer.
Miracast Method: Wireless Screen Mirroring
Technology Miracast is a standard for wirelessly transmitting image and audio from a computer screen to a TV. In Windows 10, this feature is natively implemented and requires no additional software. It allows you to completely clone your desktop or extend it, which is convenient for presentations or viewing web content on a larger screen.
To start the process, there is a special key combination on your computer keyboard. Press simultaneously Win + KThe "Connection" panel will appear on the right. The system will begin searching for available wireless displays. If your TV LG turned on and is online, its name should appear in the list.
After selecting the TV, a connection confirmation message may appear on the screen. Use the remote control to grant access. Once the connection is established, the image from the PC monitor will appear on the TV. You can change the display mode by pressing Win + P and selecting "Duplicate" or "Extend".
☑️ Pre-launch check for Miracast
It's worth noting that using Miracast puts a strain on your computer's Wi-Fi adapter. If you're playing a demanding game or a high-bitrate video, you may experience artifacts or lag. This method is ideal for office tasks and photo viewing.
⚠️ Warning: The Miracast protocol is not protected by high-level encryption. Do not use screen mirroring to access sensitive banking information or passwords on open Wi-Fi networks.
What to do if the mouse cursor lags?
Cursor lag is often caused by low bandwidth. Try lowering your screen resolution in Windows settings before streaming or switching your router to a less-interference-prone channel.
Stream media via DLNA and Smart Share
If your goal is not to duplicate your desktop, but to view specific videos, photos, or listen to music stored on your hard drive, it is better to use the protocol DLNAIn the LG ecosystem, this feature is often called Smart Share. It allows you to transfer media files directly to your TV's decoder, offloading the computer's processor.
Windows 10 has built-in streaming support. Open any media file (such as a video) using the default player or the Movies & TV app. In the player interface, find the "Cast to Device" button. Select your TV from the drop-down list. LG.
An alternative method is to use the file's context menu. Right-click the video or photo, select "Cast to Device," and select your TV. The file will begin playing on the TV, and a playback control window will open on your computer, allowing you to adjust the volume and navigate the timeline.
| Parameter | Miracast (Projection) | DLNA (Streaming) |
|---|---|---|
| Transmission type | Full screen broadcast (streaming video) | Transfer a file directly to TV |
| PC load | High (real-time encoding) | Low (data transfer only) |
| Quality | Depends on the strength of the Wi-Fi signal | Original file quality |
| Control | From a computer | From a computer or TV remote control |
The advantage of DLNA is that the TV decodes the video itself. This means that even if you have a slow computer, 4K video will play smoothly as long as your Wi-Fi network is fast enough. However, supported formats depend on the capabilities of the TV itself, not Windows.
Configuring network and sharing settings
For all device discovery features to work correctly, you must correctly configure your network profile in Windows. The operating system must treat your connection as "Private" and not "Public." For security reasons, the system hides your PC from other devices, which prevents it from discovering your TV.
To check and change this setting, go to Settings → Network & Internet → StatusClick on the properties of your Wi-Fi connection. In the "Network Profile" section, select the option PrivateThis action will open ports for local communication.
Next, you should check your sharing settings. Open Control Panel → Network and Sharing Center → Change advanced sharing settingsIn the "Private" profile, make sure "Turn on network discovery" and "Turn on file and printer sharing" are enabled.
- 🔍 Open "Services" (click
Win + R, enterservices.msc). - 📡 Find the "DLNA Media Server" or "General Notification Service" service.
- ▶️ Make sure they are running and the startup type is set to "Automatic".
- 💾 Restart your computer after making changes to your network settings.
Sometimes the DNS cache can interfere with the correct resolution of device names on the network. Clearing the cache can help if the TV appears in the list but the connection fails. To do this, use the command line.
ipconfig /flushdnsRunning this command will flush the DNS cache and may resolve issues with device names on your local network.
⚠️ Note: The Windows 10 Settings interface may vary slightly depending on the build version (21H2, 22H2, etc.). If you can't find the item, search for keywords in the Start menu.
Using third-party software and browsers
Windows' built-in tools are effective, but sometimes you need more flexible tools. Browser Google Chrome It has a built-in casting function that works via the Chromecast protocol, which is supported by many modern LG models. It's a great way to cast a browser tab or your entire desktop.
Open your browser, click the three dots in the upper right corner, and select "Cast." You can choose to cast a specific tab, your entire desktop, or a file. If your TV supports Chromecast built-in, it will appear in the list. If not, you can use an emulator app on your TV.
For more advanced users there is a program Home Media Server or PlexThese apps create a powerful media server that not only streams files but also beautifully displays your library with posters and descriptions. Plex requires installation of the server on your PC and the client app on your LG TV via the Content Store.
Using specialized software is especially important if standard Windows tools can't handle certain audio formats or subtitles. A local server can stream the file in real time, transcoding it on the fly to suit the TV's capabilities.
Diagnostics and solution
Despite the simplicity of the technology, users often encounter a situation where the computer doesn't detect the TV. First, check your Wi-Fi adapter drivers. Outdated network card software may not support wireless display features. Visit the laptop or adapter manufacturer's website and download the latest drivers.
Another common issue is audio and video desynchronization. This can often be resolved by adjusting the playback buffer in the audio driver settings or reducing the broadcast quality in the projection settings. Click Win + P →"Advanced projection settings" (if available) or change the screen resolution to a lower one.
If your LG TV stops responding or the connection keeps dropping, try rebooting your router. Running it for long periods of time without powering it down can cause the router's memory buffer to overflow, causing data packet loss.
- 🔄 Update your LG TV firmware via the "About this TV" → "Check for updates" menu.
- 🛡️ Add exceptions to Windows Firewall for Media Server services.
- 📶 Make sure AP Isolation is not enabled on your router.
- ⚡ Try setting a static IP address for your TV in your router settings.
In rare cases, the problem lies with your antivirus software. Kaspersky, ESET, or Avast may block local connections. Try temporarily disabling your network protection and check if the TV appears in the list of available devices.
Why does video lag even with good Wi-Fi?
Even with a strong signal strength, interference from neighboring routers can cause packet loss. Switch your router to a clear channel in the 5 GHz band using the administrator settings (usually 192.168.0.1).
Frequently Asked Questions (FAQ)
Is it possible to transmit an image if the router is not connected to the Internet?
Yes, you can. Internet access is not required for Miracast and DLNA to work; only a local network is required. The main requirement is that the router is turned on and broadcasting Wi-Fi, and that the computer and TV are connected to it. Wi-Fi Direct mode is also possible if supported by both devices, allowing a direct connection without a router.
Why is there no sound on the TV when transmitting video?
Most likely, your computer speaker is still the default playback device in Windows. Click the speaker icon in the system tray (lower-right corner), select the up arrow, and select your LG TV or "Digital Device (HDCP)" from the list of audio output devices.
Does my old LG TV support wireless projection?
Screen Share (Miracast) is available on LG Smart TVs (webOS platform or older NetCast 4.0 and above). If you have an older model without Smart features, you'll need to connect an external adapter, such as a Chromecast or Miracast dongle, to the HDMI port.
How to reduce lag when gaming on a PC on a TV?
Wireless connections often have excessive input lag for gaming. Using an HDMI cable is recommended. If this isn't possible, enable "Game Mode" in your TV's picture settings and ensure the PC and TV are connected to the router via a 5 GHz band within close proximity.