Modern technologies make it possible to transform a regular TV into a powerful multimedia center capable of displaying content from any device in the home. Screencasting Mounting your laptop to an LG display gives you access to photos, movies, and work presentations on a large display without the hassle of cables. This is especially useful for watching online movies or demonstrating educational materials when the monitor's diagonal size seems too small.
The device synchronization process is based on a local wireless network, ensuring high data transfer rates. You don't need to buy expensive HDMI cables or adapters if your router and TV support the standards. Miracast or DLNAAll you need to do is configure the settings correctly in your Windows or macOS operating system, and activate the appropriate function in your TV menu.
In this article, we'll take a detailed look at all available connection methods, from built-in operating system tools to specialized apps. You'll learn how to avoid image lag and audio desync, and understand why your laptop sometimes doesn't detect your TV. The key condition for successful operation is that both devices are located in the same Wi-Fi router subnet.
Wireless transmission technologies: Miracast and DLNA
Before you begin setting up, you need to understand the differences between the main data transfer protocols. Miracast — is a technology that allows you to broadcast your screen image in real time, essentially creating a mirrored copy of your monitor on your TV. It's ideal for sharing your desktop, games, or videos that don't support standard streaming formats.
Unlike him, DLNA (Digital Living Network Alliance) works with pre-made files. You select a video file from your laptop's hard drive and send it to the TV, which acts as a renderer. In this case, playback can be controlled from either the computer or the LG remote, but the desktop or browser won't display fully.
LG TVs use their own implementation of these technologies called Smart ShareThis feature combines DLNA capabilities for media files and wireless display protocols for screen sharing. It's important to note that image quality directly depends on the power of your Wi-Fi router and airwave congestion.
Modern LG models with support webOS Miracast also enables AirPlay 2 for Apple device owners. This provides native integration with MacBooks without the need for third-party software. However, for Windows laptops, Miracast remains the primary standard.
Preparing equipment and network
A successful connection is impossible without properly preparing the infrastructure. The first step is to ensure that both the laptop and the LG TV are connected to the same Wi-Fi network. If you have a dual-band router, ensure both devices can see each other and are on the same frequency (2.4 GHz or 5 GHz), although modern routers often combine them into a single network.
On the TV side, you need to activate the signal reception mode. To do this, press the button on the remote control. Settings (gear) or InputSelect the signal source in the menu. Screen Share or find the app Device ConnectorOn some models the function may be called Mobile Connection.
It's also important to check your power saving settings. If your laptop goes into sleep mode while you're watching, the stream will be interrupted. It's recommended to disable the display and sleep settings in your power settings during the session.
Make sure your laptop's wireless adapter drivers are updated to the latest version. Older Wi-Fi drivers may not correctly support Wireless Display Group (WFD) protocols, resulting in connection errors or low FPS.
☑️ Check before connection
Casting from Windows 10 and 11 using Projection
Windows 10 and 11 operating systems have a built-in "Projection" feature, which is based on the Miracast standard. This is the fastest way to display an image without installing additional software. The algorithm is simple: press a key combination Win + K on the laptop keyboard.
The "Connection" or "Cast" panel will appear on the right. The system will begin searching for available devices. When your LG TV appears in the list (usually labeled as LG webOS TV or a model number, such as 55NANO86), click on it. A connection confirmation prompt may appear on the TV screen, which you'll need to accept with the remote.
Once connected, you can select the operating mode. Click Win + Pto switch between modes: "Duplicate" (a copy of the screen), "Extend" (the TV becomes a second monitor), or "Second Screen Only." Extend mode is especially convenient for work, allowing you to keep documents on your laptop and display videos on your TV.
⚠️ Note: If you see the message "Your PC or mobile device does not support Miracast" when searching for devices, check the specifications of your Wi-Fi adapter. Some older adapters do not support Wi-Fi Direct, which is necessary for this technology to work.
To adjust the image quality, go to Settings → System → Display → GraphicsHere you can change the resolution or refresh rate if the picture on your TV looks stretched or jerky. The optimal resolution is 1920×1080 at frequency 60 Hz.
What to do if the connection is reset?
Frequent connection drops may be caused by interference. Try switching your router to a less-congested channel or moving your laptop closer to the TV. Restarting the router may also help.
Using the LG TV Plus app and Smart Share
If the built-in Windows tools are unstable, you can use the proprietary software from LG. Application LG TV Plus (available in Microsoft Store) or older Smart Share Provides advanced control over media content. It allows you to not only mirror your screen but also control your TV from your laptop keyboard.
To work with media files via DLNA, follow these steps:
- 📺 Open the app on your TV
Photos and videosorSmart Share. - 💻 On your laptop, open File Explorer and find the video or photo you want.
- 🖱️ Right-click on the file, select
Transfer to device(Cast to Device). - 📡 Select your LG TV from the list.
The advantage of this method is that the laptop acts only as a server, while the TV's processor handles the decoding. This reduces the load on the computer and allows you to watch high-definition video even on less powerful laptops.
However, it's important to consider format limitations. The TV may not play the file if the video codec isn't supported by its built-in player. In such cases, it's better to use screen mirroring (Miracast), where the TV simply displays what the laptop sees, and the PC handles the decoding.
Connecting MacBook and macOS devices
Apple device owners are in luck: modern LG TVs support the technology AirPlay 2This allows you to broadcast your screen or individual program windows natively, without any hacks. Make sure AirPlay support is enabled on your TV (usually it's enabled by default in the Settings → Connection).
On a Mac, click the Control Center icon in the menu bar and select Repeat screensSelect your LG TV from the list of available devices. If you're being asked for a passcode for the first time, enter the numbers displayed on the TV screen into the field on your computer.
AirPlay functionality on LG allows you to not only mirror your screen but also use your TV as a separate monitor. In macOS Display Settings (System Preferences → Monitors) You can adjust the window placement and resolution. This turns the living room into a fully-fledged workspace.
For older LG models that don't support AirPlay, you'll have to resort to third-party solutions. Popular apps like AirServer or Reflector installed on the TV (via the LG Content Store, if available) or on a PC connected to the TV, emulating an AirPlay receiver.
Comparison of connection methods
The connection method you choose depends on your goals: whether you want to simply share photos with friends, give a presentation, or play a game. Below is a table to help you choose the best method.
| Method | Latency | Picture quality | Best use |
|---|---|---|---|
| Miracast (Win+K) | Low/Medium | High (up to 4K) | Presentations, browser, photos |
| DLNA (Smart Share) | Absent | Maximum (original) | Watching movies and TV series |
| AirPlay 2 | Minimum | High | macOS/iOS users |
| HDMI (cable) | Zero | No losses | Games, professional work |
As the table shows, DLNA is best for watching movies, as it doesn't create additional network load when transmitting a pre-programmed stream. For interactive tasks where cursor responsiveness is essential, Miracast or a wired connection are preferable.
Keep in mind that wireless transmission always introduces a slight delay. While it's unnoticeable for office work or YouTube viewing, in fast-paced shooters, you might notice a delay between pressing a button and the action on screen.
Troubleshooting and error resolution
Despite the simplicity of setup, users often encounter difficulties. One of the most common issues is a laptop not detecting the TV. In 90% of cases, this can be resolved by checking whether the devices are on the same subnet. If you have a router with a guest network, make sure both devices are connected to the main network, as guest networks are often isolated from each other.
⚠️ Warning: Antivirus software or Windows Firewall may be blocking incoming connections. If the connection fails, try temporarily disabling the firewall or adding an allow rule for private networks.
Another issue is audio and video desync. This often occurs when the Wi-Fi channel is overloaded. Try lowering the video bitrate or closing background downloads on other devices. Restarting the router, which clears the cache and redistributes channels, also helps.
If the image on your TV doesn't fill the entire screen (the edges are cut off), check the aspect ratio settings. On your LG remote, press the button Aspect Ratio (often looks like three dots or a square with arrows) and select the mode Just Scan or 16:9On your computer, you should also check the scaling in the display settings.
Frequently Asked Questions (FAQ)
Is it possible to broadcast a screen if there is no internet, only a router?
Yes, Miracast and DLNA don't require internet access. The router needs to create a local Wi-Fi network to which the laptop and TV are connected. Even without internet access, data transfer between devices will work.
Why does the picture flicker when streaming via Wi-Fi?
This is a sign of low channel throughput or severe interference. Try switching your router to the 5 GHz frequency if both devices support it. Also, make sure your laptop isn't too far from the access point.
Do all LG TVs support Screen Share?
Almost all LG Smart TVs released after 2013 support this feature. However, older (non-smart) models require an external adapter (such as a Chromecast or Miracast dongle) to be connected to the HDMI port.
How do I turn off the broadcast?
The easiest way is to press a combination Win + K On Windows, click the AirPlay icon in the menu bar and select "Disconnect." On a Mac, click the AirPlay icon in the menu bar and select "Turn AirPlay Off." Alternatively, simply change the input source on your TV.