Modern home multimedia systems rarely exist without a computer-TV connection, allowing content to be displayed on a large screen without unnecessary wires. Wireless broadcasting has become a standard thanks to advances in technology Miracast And DLNA, which are built into most modern operating systems and smart TVs. You no longer need to run long HDMI cables across the room to watch a movie or presentation.
The setup process depends on your operating system version, router model, and TV firmware, so a universal "Cast" button may not exist. In this article, we'll cover all proven connection methods, from built-in Windows 10 and 11 tools to specialized software for older TV models. It is critical that both devices are on the same subnet of your router., otherwise it will be impossible to detect gadgets.
Before you begin setting up, make sure your router supports the standard. 5 GHz to transmit heavy video streams without lag or artifacts. If you plan to watch 4K video, an older 2.4 GHz Wi-Fi router may not be able to handle the bandwidth, causing image stuttering. Below, we'll cover the technical details and step-by-step instructions.
Wireless Streaming Technologies: Miracast vs. DLNA
Users often confuse these two technologies, although they solve different problems and operate on distinct principles. Miracast — is a wireless image transmission standard that completely mirrors your computer screen on your TV in real time. It's ideal for showing presentations, working with documents, or playing games, as latency is minimal and the signal is transmitted directly between devices (Wi-Fi Direct technology).
Unlike mirroring, DLNA (Digital Living Network Alliance) is designed exclusively for streaming media files. You won't see the Windows desktop, mouse cursor, or open browser windows. The TV acts as a renderer, playing a file (video, photo, music) stored on the PC's hard drive. This saves computer resources, as the TV handles the decoding itself.
- 📺 Miracast — full screen mirroring (Windows + Android).
- 🎬 DLNA — broadcasting only media files from folders.
- 🌐 Chromecast - streaming of Chrome browser tabs.
⚠️ Please note: Using Miracast increases the load on your computer's processor and graphics card, as it must encode the video stream in real time. This may cause reduced gaming performance on older laptops.
The choice of technology depends on your end goal: if you just want to play a movie, DLNA or built-in browser features are more convenient. However, if you need interactive experiences, such as slideshows or website navigation, Miracast is essential. Modern TVs Samsung, LG And Sony Both protocols are supported, but their activation may require separate menu actions.
Preparing equipment and setting up the network
The foundation for a stable broadcast is a properly organized local network. The computer and TV must be connected to the same routerIf you're using a guest Wi-Fi network or AP Isolation on your router, the devices simply won't "see" each other. It's also recommended to disable VPN connections during setup, as they can change the network gateway and hide the device from local detection.
Check that your PC's wireless module drivers are up to date. Go to device Manager, find the section Network adapters and make sure your Wi-Fi module has the latest manufacturer software installed. Often, TV detection issues are resolved by updating the driver. Intel Wireless Display or a similar component.
☑️ Checking connection readiness
If your router is dual-band, try connecting both your PC and TV to the 5 GHz network. This will provide a wider data transfer channel. In apartment buildings, where the airwaves are clogged with neighbors' signals, this is critical to eliminating image stuttering. You can also reserve static IP addresses for your devices in your router settings so they always have permanent addresses on the local network.
⚠️ Please note: Smart TV interfaces and operating system versions are updated regularly. The layout of menu items may differ from those described, so please look for similar sections in your model's settings.
Screencasting in Windows 10 and 11 (Miracast)
The easiest way to display an image is to use the built-in "Projection" feature. In Windows 10 and 11, this mechanism is implemented natively and does not require additional software. Press the following key combination: Win + K on the keyboard. The "Connection" panel will open on the right, where the system will begin searching for available wireless displays.
If the TV supports the receiving mode (usually called Screen Share, Miracast or Wireless monitor), it will appear in the list. Click on it, and after a few seconds the image from the monitor will appear on the big screen. In some models LG or Philips You must first launch the appropriate application from the list of signal sources (Input).
| Parameter | Description | Recommendation |
|---|---|---|
| Permission | Depends on TV | Adapt or Expand |
| Frequency | 60 Hz (standard) | 30 Hz for weak networks |
| Audio | Passed along | Switch audio output |
| Delay | 100-300 ms | Not for fast-paced games |
To control the operating mode, press Win + PYou can choose between "Duplicate" (a copy of your screen), "Extend" (the TV becomes a second monitor with its own desktop), or "Second Screen Only" (the PC monitor goes dark). Extend mode is especially convenient for work: you can see your notes on your laptop and video content or a presentation on the TV.
Using Google Chrome Browser and Chromecast
If the built-in Windows tools do not work or your TV is equipped with a system Android TV or has a built-in ChromecastGoogle Chrome is a great solution. This method allows you to cast not only tabs but the entire desktop, and it often works more reliably than native Miracast in Windows.
Open the Chrome browser on your computer. Click the three dots in the upper right corner and select Broadcast... (Cast). In the menu that opens, you'll see a list of available devices. Before launching, click the button Sources and select "Cast Desktop" or "Cast Tab" depending on your needs.
- 🖥️ Broadcast tab - ideal for YouTube videos, Netflix or presentations.
- 💻 Screencasting — shows everything that happens on the monitor, including notifications.
- 📁 File broadcast — select a specific video file from the disk for playback.
The advantage of the Chrome method is its excellent codec optimization. If you're streaming a tab with a video, the browser takes care of the decoding, reducing the load on the TV. However, it's worth keeping in mind that streaming the entire screen increases the load on the PC's processor. This can become a bottleneck for older laptops.
Why is there no sound when streaming through Chrome?
By default, Chrome may not broadcast system audio if Cast Tab is selected. In this case, audio will only come from the browser. To broadcast all computer sounds, select "Cast Desktop" and ensure "Cast Audio" is checked in the Cast settings.
Alternative programs for Smart TVs of different brands
TV manufacturers often release their own software to simplify connection, which can work better than standard protocols. For example, for TVs Samsung there is an application Samsung Smart View (or the Mobile PC on TV feature in new models). It allows you to not only mirror your screen but also control content from your PC.
TV owners LG can take advantage of the official program LG TV Plus or the Screen Share feature built into webOS. These apps often allow for faster file transfers over the network than standard DLNA and offer a more user-friendly interface for selecting your media library. For TVs Sony Android TV works great with apps like Video & TV SideView.
A universal solution is to use third-party software, such as Let's View or AirServerThese programs are installed on a PC and emulate an AirPlay or Miracast receiver, allowing you to connect even to "dumb" TVs via set-top boxes. However, it's worth remembering that free versions of such software often have limitations on runtime or image quality.
⚠️ Important: When installing third-party software from TV manufacturers, carefully check the download source. Download programs only from the brand's official websites to avoid the introduction of adware or viruses.
Solving problems with lag and image quality
Even with a perfect setup, users may experience audio and video desync or image "quaking." This is most often caused by a congested Wi-Fi channel. If neighboring routers, microwave ovens, or baby monitors are nearby, they can cause interference. Try changing the Wi-Fi channel in your router settings to a less congested one (e.g., 1, 6, or 11 for 2.4 GHz).
Another common issue is power saving. Windows may limit the power of the Wi-Fi adapter to conserve battery life. Go to Control Panel → Power supply → Setting up a power plan → Change advanced power settingsFind the "Wireless Network Adapter Settings" section and set the mode to Maximum Performance.
If nothing helps and the image continues to lag, check the resolution. Reducing the streaming image quality from 4K to 1080p can dramatically improve smoothness. Also, make sure your antivirus or firewall isn't blocking local connections. Add your TV device to the list of exceptions or trusted networks.
Frequently Asked Questions (FAQ)
Is it possible to display an image if there is no router at all?
Yes, this is possible using Wi-Fi Direct technology. Many modern TVs and Intel graphics cards support direct connections. When you select a device in the "Projection" menu (Win+K), the computer can automatically create an access point for the TV to connect to, or vice versa. The transfer speed will be lower than through a router, but the picture will still be visible.
Why is my TV not visible in the list of available devices?
The most common cause is that the devices are on different networks (for example, one on 2.4 GHz, the other on 5 GHz with different SSIDs, or guest mode is enabled). Also, check if your antivirus software is blocking network detection. Make sure Screen Mirroring is enabled on your TV.
Is sound transmitted via Wi-Fi broadcast?
Yes, when using Miracast and Chromecast, audio is transmitted along with video. However, you may need to manually switch the playback device in Windows settings. Click the speaker icon in the system tray and select your TV from the list of output devices.
Does broadcasting affect internet speed?
When using DLNA or local Miracast, the internet may not be used at all, as the traffic is routed within the local network. However, if you stream online video (YouTube, Twitch) and broadcast it to your TV, your internet speed will be used as usual. Your Wi-Fi channel will be heavily loaded, which may slow down other devices.