Modern multimedia systems make it easy to integrate computer hardware into a home theater, turning the living room into an entertainment center. TV 4S useless HDMI-Wireless technology today is stable, providing high-resolution video and clean sound.
Smart TV owners often face the challenge of showing a presentation, running a movie from a browser, or simply playing a game on a large display. Wi-Fi connections eliminate unnecessary wires that can get tangled up and spoil the aesthetics of the interior. Wireless synchronization of devices has become a standard available to everyone, regardless of their level of technical training.
The setup process takes only a few minutes if you know the right sequence of actions and understand the features of the Android TV operating system, which runs the TV. It is important to consider that the quality of the connection depends on the speed of your router and the distance between devices. In this article, we will discuss in detail all available methods of broadcasting, eliminate typical errors and adjust the maximum system performance.
Equipment preparation and network settings
Before you start pairing, you need to make sure that both devices are in the same network conditions, a fundamental requirement for the Miracast and Google Cast protocols embedded in the system, so if the laptop is connected to the mobile Internet or the guest network, and the TV to the main network, it will not be possible to detect the devices.
Check to have the router support 802.11n or newer, as older models may not be able to handle high-resolution video streaming. Also make sure that the Xiaomi Mi TV 4S has the latest firmware installed, which often solves driver compatibility issues.
Go to the settings of the TV and go to Settings → Network and Internet. Make sure that the connection status is active and the signal is stable. On the computer, you also need to activate the Wi-Fi module and turn off the power saving mode for the network adapter so that the system does not interrupt the connection while running.
⚠️ Warning: Make sure that the router has turned off customer isolation (AP Isolation, otherwise devices on the same network will not “see” each other.
The stability of the entire system depends on the quality of the signal, so if there is interference, it is better to move the router closer to the viewing area or use a wired connection for one of the devices, if possible.
Use of the built-in Chromecast feature
The Android TV operating system installed on Xiaomi Mi TV 4S has built-in support for Google Cast technology. This is the most native and stable way to transfer images, without requiring additional software to be installed on the TV.
To start working on a laptop running Windows 10 or 11, you need to open the Google Chrome browser. Click on the three dots in the upper right corner of the menu and select Cast. The system will automatically start searching for available receivers on the local network.
In the list that appears, you'll see the name of your TV. Before you start the broadcast, click Sources and select Screen Translate if you want to duplicate the entire desktop, not just the browser tab, which is especially convenient for showing photos or working with documents.
- 📺 Open the browser menu and find the broadcast option.
- 💻 Select Screen Translation Mode for Full Duplication.
- 📡 Wait for the connection and confirm the request on the TV screen.
Image quality can vary depending on the network load, but for office tasks and viewing photos, this method is optimal in terms of ease of setting up.
Translation via Miracast (WiDi)
Miracast technology (often called WiDi by Intel) allows you to create a direct connection between devices without the need for a router, although in most cases traffic still goes through the local network. In Windows, this feature is called “Connect to a wireless display” and is built into the system at the kernel level.
To activate the reception of the signal on the Xiaomi Mi TV 4S, you need to find and run the Wireless display app or similar in the list of programs. On some versions of the firmware, this feature may be called Mi Cast or integrated into the Input signal source menu.
On your laptop, press the Win + K key combination. On the right, the Connect panel will open, where the system will start scanning the ether. Once your TV name appears, click on it to initiate the handshake process.
Windows settings → System → Projecting on this PCIn this Windows menu, you can customize your computer's visibility to other devices, but for our task, it's important that the computer search for displays. Once connected, the image can appear with a delay of a couple of seconds, which is the norm for wireless video compression protocols.
⚠️ Warning: Miracast protocol is sensitive to graphics card drivers. If the connection fails, update the graphics adapter drivers from the manufacturer's website.
This method is good because it does not depend on Google services and works even on a fully autonomous local network without access to the Internet.
☑️ Checking before connection
Third-party synchronization applications
If standard operating system tools are unstable or do not support the right codecs, specialized utilities come to the rescue. Programs like LetsView, AirServer or ApowerMirror often provide better performance and less latency when transmitting a video stream.
The way they work is to install a server part on the TV through the Google Play Store and a client part on the laptop. IP-address and establish a secure connection.
Some programs allow you not only to duplicate the screen, but also to control the computer from the TV remote, which turns the Xiaomi Mi TV 4S into a full-fledged terminal, which is especially useful if the laptop is in another room and you want to control playback.
| Annex | Platform TV | Delay. | Features |
|---|---|---|---|
| LetsView | Android TV | Low. | Free, no watermarks. |
| AirServer | Android TV | Minimum | Support for AirPlay and Google Cast |
| ApowerMirror | Android TV | Medium | Control from TV, screen recording |
The choice of a particular software depends on your picture quality requirements and your willingness to put up with possible limitations of free versions, such as advertising or session time limits.
Why is there a delay in the image?
Configuring resolution and sound accompaniment
After successfully connecting the image, it is important to adjust the output settings correctly so that the picture on the Xiaomi Mi TV 4S looks clear and occupies the entire screen without black fields. Often, by default, the system chooses a safe but low resolution that does not unlock the potential of the 4K TV matrix.
Right-click on your Windows desktop and select Screen Settings. Under Display, select your wireless monitor and set the recommended resolution, usually 3840x2160 for 4S models. Also check the refresh rate by setting 60Hz for smooth interfaces.
To transmit sound, you need to switch the default playback device. Click on the speaker icon in the tray, select the arrow next to the volume slider and find your Xiaomi TV in the list. Now all audio stream will go through the TV's acoustic system.
- 🖥️ Set the native resolution of the TV matrix.
- 🔊 Switch the output to HDMI/Wi-Fi device.
- ⚙️ Calibrate the color reproduction in the settings of the TV.
If the sound is missing or interrupted, check the sound format settings in the Windows Sound Control Panel by trying to change the bit or sampling rate.
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To reduce latency when playing games, turn on the Xiaomi TV mode “Game” (Game Mode) in the image settings, which will turn off some post-processing of the picture and speed up the response.
Diagnosing problems and eliminating errors
Even when set up correctly, there can be situations where the laptop can’t see the TV or the connection is constantly broken, most often the problem lies in the settings of the Windows firewall, which blocks incoming connections for the “Projection” function.
Go to Control Panel → Windows Defender Firewall → Application Interaction Permission. Go to Wireless Display or Connect and make sure that the checkmarks are ticked for private and public networks. This will open the necessary ports for the protocol to work.
Another common cause of failure is a crowded cache DNS conflict IP-In such cases, a simple reboot of the router and both devices helps, which resets temporary network errors.
⚠️ Warning: If the TV is too far from the router, the signal may be unstable. Use the Wi-Fi analyzer on your smartphone to check the signal level at the TV installation point.
In difficult cases, when software methods do not help, it makes sense to reset the network settings on the TV to factory values and configure the connection again by removing old profiles.
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The stability of the wireless connection depends on the quality of the router and the absence of radio interference in the 2.4 GHz band by 90%.
Optimizing Wi-Fi network performance
For high-quality video, especially in 4K resolution, the bandwidth of the channel may not be enough if the network is congested. Modern routers operate in two bands: 2.4 GHz and 5 GHz. For streaming content, it is critical to use the 5 GHz band.
This frequency range provides faster data rates and is less susceptible to interference from neighbourhood networks, Bluetooth devices and microwave ovens. Make sure that both the laptop and Xiaomi Mi TV 4S are connected to your router's 5G network.
If your router is old and does not support 802.11ac (Wi-Fi 5) or newer, you should consider replacing it. For wireless video transmission, this is the weakest link in the chain that can not be compensated by software settings.
It is also recommended to close the background applications on the laptop that actively consume traffic, such as torrents or cloud syncs, to allocate maximum resource to the broadcast channel.