When Xiaomi stops streaming an image to the big screen, it is often taken by surprise while watching a movie or presentation. Users are faced with the fact that the Mi Cast feature or the standard Translation button simply does not see the available devices, or the process stops after a few seconds. This is a common problem that can be caused by software failures in the shell of MIUI or HyperOS, and banal router settings.
Before you panic and carry a gadget to the service, it is worth understanding the basic principles of wireless data transmission. It is critical to understand that for Miracast and Chromecast to work smoothly, both devices must be in the same Wi-Fi subnet, and not just be connected to the same router through different frequency ranges. In today's smart home requires competent networking, otherwise synchronization between a smartphone and Xiaomi TV (or any other Smart TV) becomes impossible.
In this article, we will look at all possible causes of failure and offer step-by-step solutions. We will touch not only on the software settings, but also on the nuances of Wi-Fi modules, which are often ignored in diagnostics, you will learn how to properly configure DLNA, why ad blockers interfere with connection, and what hidden features can help in a critical situation.
Checking network infrastructure and Wi-Fi ranges
The most common reason a phone doesn’t see a TV or refuses to transmit an image is because of the wrong wireless network configuration. Current routers operate in two bands: 2.4 GHz and 5 GHz. Although they may have a single name (SSID), for some broadcast protocols, such as Miracast, it is critical that devices are in the same frequency range.
If your smartphone is connected to a 5GHz network and your TV is hanging at 2.4GHz, the router can isolate them from each other at the logical subnet level, even if they are on the same network externally, especially for older Xiaomi Mi Box models or budget TVs that do not support high-speed standards.
⚠️ Note: Using a Guest Network on a router almost always blocks the ability to detect devices from each other. Make sure that both the phone and TV are connected to the main network, not the guest profile.
It’s also worth checking the client isolation settings on the router itself, which prevents devices from sharing data within the LAN, making it impossible to stream. For a home network where you trust your gadgets, this option is better off via the router’s web interface.
Configure built-in broadcast functions in MIUI and HyperOS
In Xiaomi’s shells, different system components are responsible for the transfer of the image depending on the Android version and the firmware region. In global versions, this is often called “Translation” or “Cast”, and in Chinese versions it is called Mi Cast. If the standard notification curtain does not contain the desired button, it can be added through the control editor.
To activate the function, you need to go to the Settings menu → Connection and sharing → Broadcast. You should activate the slider and wait for the list of available devices to appear. If the TV is not displayed, try clicking on three dots in the corner of the screen and select manual search by IP-address, if such option is available in your version of the software.
- 📱 Make sure your TV is running a Wireless Display app or similar signal reception service.
- 🔌 Reboot the Wi-Fi module on your phone by turning on and off “Flight Mode».
- 🔄 Update the system components of Google Play Services as they are responsible for Chromecast protocols.
Sometimes the problem is with permissions for a system application. Go to Settings → Apps → All apps, find Translation (or Mi Cast) and check if it has permission to access the LAN and geolocate. Without the right to geolocate, scanning nearby Android devices often doesn’t work properly.
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If the built-in feature doesn’t work, try using alternative translation apps like Screen Translation or Mirror for TV, which use their own compression codecs.
Using the Mi Home app and the Xiaomi ecosystem
For owners of Xiaomi and Redmi equipment, the official Mi Home app is a great tool, which allows you not only to manage a smart home, but also to perform the function of a remote and a translator. If standard methods do not work, integration through this software can bypass software locks.
You need to add your TV or Mi Box as a device to the app. Once you pair it successfully, you often have a "Translate" or "Mirror" button in your card, which is especially effective when you don't want to stream the entire screen, but a particular media file from the gallery.
| Connection method | Stability | Delay (Latency) | Image quality |
|---|---|---|---|
| The built-in broadcast (Mi Cast) | Tall. | Low. | Original |
| Mi Home appendix | Medium | Medium | Compressed. |
| Google Chromecast | Tall. | Low. | Original |
| Third-party annexes | Low. | Tall. | Compressed. |
It is important to note that when using Mi Home, the phone and TV must be logged in to the same Mi Account, a security requirement that prevents unauthorized access to your screen by unauthorized persons on public networks.
Compatibility problems of codecs and video formats
Often users complain that the broadcast starts, but after a few seconds, a black screen with sound working, or the video does not start at all, is a classic sign of codec incompatibility. The phone can decode a video file, but the TV can not play it in streaming mode.
The most common problems are with the HEVC (H.265) and Dolby Vision formats. If your Xiaomi TV is older, it may not support HDR10+ or certain compression profiles that a modern smartphone uses.
How to check the video codec?
The solution could be to use third-party broadcast-enabled players like VLC for Android or MX Player, which have built-in codecs and can recode the stream on the fly before being sent to the TV, reducing the load on the TV decoder.
The Impact of VPNs, Ad Blockers and Antiviruses
Ad-blocking apps installed on a phone (such as AdGuard) or an activated VPN can completely block local data protocols, which redirect all traffic through a remote server or filter it, causing the phone to “not see” the device on the local network.
Device detection protocols such as SSDP and mDNS only work within the local network. If your traffic is going through the VPN tunnel, broadcast packets simply don't reach the TV. Be sure to turn off any means of bypassing locks before attempting to broadcast.
- 🛑 Stop the job completely. VPN-service, not just fold the application.
- 🚫 Turn it off. DNS-filtering DNS (Private DNS) Wi-Fi section.
- 🔒 Check your antivirus settings – Network Protection mode can block incoming connections from TV.
⚠️ Warning: Some "game accelerators" or "system boosters" also create virtual network interfaces that may conflict with the wireless projection function.
Alternative ways to connect: HDMI and USB-C
If wireless methods fail due to poor signal or hardware limitations, there is always a proven wired option. For Xiaomi phones with USB Type-C port, there is support for the MHL standard or DisplayPort Alt Mode, which allows you to display images directly through the cable.
You’ll need a special Type-C to HDMI adapter. It’s important to make sure your particular smartphone model supports video output (mostly the Mi and Xiaomi flagships, as well as some Redmi Note models), and budget models may not be able to transmit video through the charging port.
☑️ Video output support verification
The advantage of wired connection is the absence of delays and dependence on the quality of Wi-Fi. The picture is transmitted in its original quality without compression, which is ideal for gaming or viewing. 4K-high-bitrate content.
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Wired connectivity via an HDMI adapter is the only way to guarantee 100% stability and no latency, regardless of the state of your Wi-Fi network.