Modern LG Smart TVs running the webOS platform offer users a wide range of multimedia entertainment options. Often, users need to project the contents of a laptop or desktop computer screen onto a larger screen to watch a movie, presentation, or share photos with the family. A wireless WiFi connection is the most convenient and aesthetically pleasing solution in this case, eliminating the need to run long HDMI cables across the room.
The setup process may seem complicated at first glance, but modern operating systems like Windows 10 and 11 offer built-in tools for wireless projection. For LG owners, this process is simplified thanks to support for Miracast and DLNA standards. In this guide, we'll cover all available methods in detail, from built-in Windows features to specialized apps, and help you avoid common connection errors.
The key to successful synchronization is a stable local network. The computer and TV should be within the same WiFi signal range and, ideally, connected to the same router. Channel capacity directly affects the quality of the transmitted image: with a low signal, delays or image artifacts are possible, especially when broadcasting video in high definition 4K.
Technical requirements and equipment preparation
Before setting up the stream, you need to make sure your equipment meets the minimum requirements. Most modern LG models released after 2014 support the technology. Miracast, which allows you to transmit images without the need for additional adapters. However, for older models to function correctly, you may need to update the TV's software via the settings menu.
The computer must also support the wireless display standard. If you're using a laptop running Windows 10 or 11, the likelihood of having the required WiFi module is almost 100%. Desktop computers without a built-in wireless module will require an external USB WiFi adapter that supports Wi-Fi Direct technology. Without this component, wireless display is impossible.
It's important to ensure both devices are on the same subnet. This means they must be connected to the same router, regardless of whether you're using the 2.4 GHz or 5 GHz frequency. Using a guest WiFi network or hotspot mode often blocks devices from discovering each other due to client isolation settings.
- 📺 LG TV with Smart TV support (webOS or older NetCast platforms).
- 💻 A computer or laptop running Windows 10/11 with a working WiFi module.
- 📶 A router with an active DHCP function and a working frequency range of 2.4/5 GHz.
- 🔌 Stable power supply (it is not recommended to interrupt the process when the laptop battery is low).
⚠️ Note: If your router is configured for "Guest Network" mode for one of the devices, they will not be able to see each other. Make sure both devices are connected to the main network.
Miracast Method: Built-in Windows and LG Function
The fastest way to display an image is to use the native projection function built into the Windows operating system. This method requires no additional software and operates within the graphics card and network adapter drivers. Miracast Allows you to clone your screen or extend your desktop onto your TV, creating a virtual connection.
On your LG TV, you need to activate signal reception. This feature may have different names depending on the webOS firmware version. Typically, just press the "Input" or "Source" button on the remote control and select "Screen Share" or "Connect to Mobile Device." On some models, the app launches automatically when you try to connect from a PC.
On your computer, press the key combination Win + KThe "Connect" panel will open on the right. The system will begin searching for available wireless displays. When your LG TV's name appears in the list, click it. A connection confirmation prompt may appear on the TV screen, which you'll need to accept using the remote.
☑️ Check before connecting Miracast
Once pairing is successful, you can select the projector's operating mode. By pressing Win + P, you'll see a menu with options: "Computer screen only," "Duplicate" (copy), "Extend" (second monitor), and "Second screen only." "Duplicate" mode is most convenient for viewing photos and videos, while "Extend" is best for working with documents.
Using the LG TV Plus app and Smart Share
If the built-in Windows tools are unstable or you need deeper integration with your media library, you should use the official software from LG. Application LG TV Plus (available in Microsoft Store) or newer version LG ThinQ They allow not only screen mirroring but also content management. This is especially useful for users who want to stream files from their hard drive without overloading their processor with video streaming.
The Smart Share function is based on the protocol DLNAIt allows you to stream media files (photos, videos, music) directly from folders on your computer to your TV. Unlike Miracast, it doesn't mirror your entire desktop, reducing the load on your WiFi network and allowing you to use your computer for other tasks while watching.
To set up DLNA in Windows, open "Streaming Media Settings" in the Control Panel. In the window that opens, find your LG TV in the list of devices and allow it to access content. After this, your photo and video folders will be accessible through the "Photos" or "Videos" app on your TV under "Connected Devices."
Why does the video lag during broadcasting?
Lag is often caused by WiFi congestion from neighboring routers or a physical obstacle between the router and TV. Try switching to the 5 GHz frequency or moving the router closer to the reception area.
Using the LG TV Plus app, the control interface becomes accessible directly on the monitor screen. You can launch YouTube, Netflix, or other services available on the TV, control the volume, and change channels. This turns your smartphone or PC into a fully functional remote control, making it extremely convenient for typing in the search bar.
Broadcasting via Google Chrome browser
The Google Chrome browser has a powerful built-in casting tool that often performs more reliably than Windows system tools, especially when it comes to casting tabs or the entire desktop to Chromecast-enabled TVs. Many modern LG models have built-in Chromecast support, making this method universal.
To start casting, open the Chrome browser on your computer. Click the three dots in the upper-right corner of the menu and select "Cast." In the window that appears, select the source: this can be a separate tab, the entire desktop, or a specific file. Then, find your LG TV in the list of devices.
If your TV doesn't have a built-in Chromecast but supports the DLNA standard, Chrome may still attempt to find one over the local network. However, for the "Cast" feature to work properly, it's recommended that your TV have a compatible receiver installed or natively support the Google Cast protocol.
| Method | Image quality | Latency | PC load |
|---|---|---|---|
| Miracast | High (up to 4K) | Low | Average |
| DLNA (Smart Share) | Original | Absent | Minimum |
| Google Chrome Cast | Depends on the network | Average | High |
Configuring network settings and eliminating interference
The quality of a wireless broadcast directly depends on the radio channel. In apartment buildings, the 2.4 GHz band is often overloaded with signals from neighboring routers, resulting in choppy images and out-of-sync audio. The optimal solution is to switch both devices to a different frequency. 5 GHz, if your router and TV support this standard.
It's also worth paying attention to the router's location. If there are thick concrete walls or metal structures between the computer and the access point, or between the router and the TV, the signal may weaken. In such cases, it's recommended to use WiFi repeaters or set up a mesh system for uniform coverage.
You can try changing the broadcast channel in your router settings to a less congested one. There are special WiFi analyzer apps for smartphones that will show which channels are free. Manually setting a static channel often works more reliably than having the router automatically select one.
⚠️ Note: LG TV menu interfaces may vary depending on the webOS version (3.0, 4.0, 5.0, 6.0, and higher). If you don't see the described option, check the official documentation for your specific model in the support section.
Solving common connection problems
Despite the apparent simplicity, users often encounter problems with their computer not detecting their TV. The first cause is antivirus software or Windows Firewall, which can block detection of devices on a public network. Ensure the network type in Windows is set to "Private" and not "Public."
The second common issue is outdated WiFi adapter or graphics card drivers. Hardware manufacturers regularly release updates to improve compatibility with new media transfer standards. Go to Device Manager, find your network adapter, and select Update Drivers.
Sometimes a complete reset of network settings helps. On an LG TV, this can be done through the menu. Settings → All settings → General → Factory reset (Be careful, this will delete your accounts and channel settings). On a PC, you can reset it via the command line with the command netsh winsock reset, after which a reboot is required.
- 🔄 Reboot your router by unplugging it from the power outlet for 10-15 seconds.
- 📡 Check if the "AP Client Isolation" mode is enabled on your router.
- 🆙 Update the “Device Connector” or “Smart Share” app on your TV via LG Content Store.
- 🔌 Disable VPN services on your computer; they frequently change your virtual location and block your local network.
Frequently Asked Questions (FAQ)
Is it possible to display an image if the TV is not Smart TV?
Without Smart TV functionality or a built-in WiFi module, you won't be able to directly connect your TV to your computer over the air. In this case, you'll need to purchase an external set-top box with Android TV or Chromecast, which connects to your TV's HDMI port and receives the signal.
Why is there no sound when streaming via WiFi?
Most often, the audio continues to play on the computer. After connecting to the TV via Miracast, you need to click the speaker icon in the Windows system tray and manually select the "LG TV" or "Digital Output" audio output device. In some cases, you may need to restart the application that is streaming the video.
Does screencasting affect internet speed?
Yes, Miracast technology and browser streaming generate significant traffic within the local network. If your router is old or your WiFi channel is weak, page loading speeds on other devices may decrease. However, this affects the actual internet speed (if no one is downloading anything) indirectly, through the load on the router's processor.
How to disable image output?
To stop the broadcast, simply press the combination Win + K and select "Disconnect" in the connection panel. You can also simply close the laptop or turn off the screen, unless sleep mode is disabled in the power settings. On the LG remote, you can press the Input button to switch to another signal source, such as broadcast TV.