Using a large TV screen as a computer monitor is a great way to comfortably watch movies, play games, or present projects without purchasing an expensive display. Modern Smart TVs from LG Offer a wide range of wireless connectivity options, allowing you to stream content from a laptop or desktop PC without the hassle of cables. This frees up your workspace from cable clutter and allows you to move freely within the room.
However, to achieve a stable picture and minimal input lag, it is necessary to properly configure the network and select an appropriate broadcast method. Wireless connection Requires careful attention to both your router and TV settings, as stream quality directly depends on your channel's bandwidth. In this article, we'll explore all the current ways to transform your LG Smart TV to the second monitor.
It's worth noting that not all methods are equally effective for different tasks. Simple screen mirroring is suitable for viewing photos or videos, while dynamic games or text processing will require more advanced, low-latency protocols. Understanding the differences between Miracast, AirPlay 2 and specialized software will help you choose the best option.
Network requirements and equipment preparation
Before setting up, make sure your router can provide sufficient data transfer speed. A stable connection is required to transmit high-resolution images (Full HD or 4K) without stuttering or compression artifacts. Ideally, it should support the standard Wi-Fi 5 (802.11ac) or newer, and operation in the 5 GHz band.
Both devices—the computer and TV—must be on the same local network. This means they must be connected to the same router. If you have a dual-band router, check that the devices aren't on different frequency bands (2.4 GHz and 5 GHz), although modern routers often combine them into a single network with a common name (SSID).
⚠️ Please note: Using the 2.4 GHz band to stream high-definition video may cause significant latency and audio desync. For monitor use, the 5 GHz band is strongly recommended.
Also check your TV model LGSupport for wireless display technologies depends on the year of manufacture and the version of the operating system installed. webOSOlder models may not support native Windows protocols or require additional applications to be installed.
Using the built-in Screen Share (Miracast) feature
The most common way to connect a Windows PC to a TV LG - this is technology Miracast, which is often called in the LG interface Screen ShareThis method allows you to duplicate your screen without having to connect to the same Wi-Fi network in the traditional sense, as the devices connect directly via Wi-Fi Direct.
To activate the mode on the TV, press the button Input on the remote or go to the main menu. Find the app Screen Share or Device Connector and launch it. The TV will enter connection standby mode, displaying the device name and access code (if required).
What to do if the TV doesn’t detect the PC?
Make sure discovery is enabled on your computer. In Windows 10/11, go to Settings → System → Projecting to this PC and set it to "Everywhere" or "On protected networks." Also, check if your firewall is blocking the connection.
On a Windows 10 or 11 computer, use the keyboard shortcut Win + KThe "Connection" panel will appear on the right side of the screen. Select your TV from the list of available devices. LGOnce paired, the desktop image will appear on the big screen.
- 📺 Open the apps menu on your TV and launch
Screen Share. - 💻 On PC, click
Win + Kand select TV from the list. - 🔗 Confirm the connection on the TV screen if prompted.
- ⚙️ Select the operating mode: "Duplicate" or "Expand".
It's important to understand that using Miracast places a strain on your computer's Wi-Fi adapter. If the drivers are out of date, the connection may be unstable. Update your wireless network drivers through Device Manager or the laptop manufacturer's website.
AirPlay 2 support on modern LG models
Computer owners Mac (macOS) and Windows users with iTunes installed or supporting browsers can take advantage of the technology AirPlay 2This feature is built into LG TVs released in 2019 and later and ensures highly stable transmission.
For macOS users, the process is extremely simple. Make sure your Mac and TV are on the same Wi-Fi network. Click the icon Control center in the menu bar and select Screen mirroringSelect your TV from the list. LGThe image is transmitted with minimal delay.
On Windows, AirPlay is more complicated, as there's no native support. However, you can use a browser. Google Chrome or Edge For broadcasting tabs, or third-party utilities that emulate an AirPlay receiver, this method is less effective than Miracast for full-fledged use as a monitor on Windows.
⚠️ Note: AirPlay may be disabled by default on LG TVs. Check your settings: All Settings → Connection → AirPlay and make sure the switch is activated.
The advantage of AirPlay is its better video stream optimization and multitasking support. You can continue working on your computer while video is playing on your TV, without significantly impacting system performance, unlike full screen mirroring.
Third-party apps for remote access and streaming
If built-in methods don't work correctly or advanced features are required, third-party solutions can help. Programs like TeamViewer, AnyDesk or specialized software like LetsView allow you to turn your TV into a monitor via a local network.
The operating scheme is simple: you install the server part of the application on your computer and the client version (APK file) on your TV. LG through the store LG Content StoreAfter entering the access code or authorizing your account, a connection is established.
This approach often results in lower latency and more image quality settings. For example, LetsView It allows you not only to duplicate the screen, but also to control the computer with a remote control (if a keyboard/mouse is connected to the TV), which turns the TV into a full-fledged workstation.
- 📥 Download and install the receiver app on your TV from the app store.
- 💻 Install the client program on your computer (Windows/Mac).
- 🌐 Run programs on both devices on the same Wi-Fi network.
- 🔑 Enter the PIN or scan the QR code to pair.
It's worth keeping in mind that free versions of such programs may have session time or image quality limitations. For full-time use as a monitor, it's better to consider paid plans or open-source solutions.
Adjusting resolution and display settings in Windows
Once successfully connected, it's important to configure the display settings correctly to ensure text is legible and aspect ratios are correct. By default, Windows may select the wrong resolution or refresh rate, resulting in a blurry image.
Right click on your desktop and select Screen parametersIn the "Multiple displays" section, select the operating mode. Mode Expand turns the TV into a second independent monitor, which is most convenient for work. Mode Duplicate simply copies the image from the main screen.
It is important to set the recommended resolution, usually it is 1920x1080 (Full HD) or 3840x2160 (4K), depending on the matrix of your LG TVAlso check the scaling: for TVs located 2-3 meters away, a scaling of 150% or 200% will be more comfortable for the eyes.
☑️ Image customization
For gamers, refresh rate is critical. In the advanced graphics settings (Advanced display settings) make sure the frequency is set 60 Hz or higher if the TV and video card support it 120 HzLow frame rates will make cursor movement jerky.
Troubleshooting: Lag, Black Screen, and Sound
One of the most common issues with wireless connections is audio and video desynchronization or a complete lack of audio. In Windows, the default audio may continue to play through your laptop speakers. To fix this, click the speaker icon in the system tray, select the output device, and select your TV. LG or Intel/Wi-Fi Display.
If you see a black screen when connecting, but there is sound, the problem may be with your video card drivers or HDCP protection. Try updating your drivers. NVIDIA, AMD or IntelRestarting the service sometimes helps too. Windows Audio And SSID Help Desk.
| Problem | Possible cause | Solution method |
|---|---|---|
| Long cursor lag | Congested Wi-Fi channel (2.4 GHz) | Switch to 5 GHz or use a cable |
| There is no sound on the TV | No output device selected | Select LG TV in Windows sound settings |
| The image is cropped at the edges | Incorrect screen format (Overscan) | In the TV settings, select the "Scan Only" or 16:9 mode. |
| Connection breaks | Weak signal or interference | Bring the router or PC closer to the TV |
Another common problem is overscan (cutting off the edges of the image). On LG TVs, this can be resolved in the picture settings: find the option Aspect ratio or Format and select Scan only (Just Scan) or 16:9This will remove the black borders and trims from the menu.
⚠️ Note: The menu interface on LG TVs may vary depending on the webOS version (3.0, 4.0, 5.0, 6.0, and later). If you don't see the options described, please consult the official user manual for your specific model.
Comparison of connection methods and final recommendations
The choice of connection method depends on your goals. For office work and document viewing, a wired connection or a stable Miracast connection are ideal. For sharing presentations from a MacBook, AirPlay is indispensable. For wireless gaming, low-latency technologies are best, although HDMI 2.1 cables will always remain the standard.
Please note that wireless image transfer drains your laptop's battery faster than usual. It is recommended to keep the device plugged in for extended periods of use. The Wi-Fi module may also become hot under constant heavy load.
In summary, modern LG TVs offer powerful PC integration tools. Proper network setup and the right protocol will allow you to enjoy the big screen without compromising on quality.
Frequently Asked Questions (FAQ)
Is it possible to connect a computer to an LG TV without Wi-Fi?
Yes, it's possible. The most reliable method is using an HDMI cable. Some models also support USB connection (for viewing media files, but not as a monitor) or a LAN cable (Ethernet), provided both devices are wired to the router, which is even more stable than Wi-Fi.
Why isn't my LG TV showing up in the list of available displays?
Check that Screen Share is enabled on the TV itself. Ensure that your antivirus or firewall isn't blocking device detection. Also, the devices must be on the same subnet (the first three digits of the IP address must be the same).
Does connecting a TV affect internet speed?
Yes, screencasting consumes a significant portion of your local network's bandwidth. If your network is limited, page loading speeds on other devices may temporarily decrease, especially when streaming in 4K.
How to remove audio delay when watching videos?
Try lowering the stream quality in the streaming app settings. If you're using Miracast, update your Wi-Fi adapter drivers. In some cases, disabling surround sound effects in your TV settings can help.
Do all LG Smart TVs support monitor function?
Almost all models with webOS 3.0 and newer support Miracast. Older models (such as NetCast) may require installing a special receiver app from the Content Store or using external adapters (such as Chromecast or Miracast dongles).