Modern Xiaomi Mi TV 4S smart TVs are complex computing devices running on the Android operating system. Over time, the software can run unstable: applications freeze, the interface slows down, and some functions stop responding to user commands. In such situations, a regular update through the settings menu often does not help, and the only right solution is a complete reinstallation of system files, known as firmware.
The process of restoring the Smart TV requires carefulness and strict adherence to the sequence of actions. A mistake at any stage can lead to the device becoming a “brick” that will not respond to the remote or control buttons. However, if you approach it correctly, you can not only return the TV to factory speed, but also eliminate software bugs accumulated over the years of operation.
In this article, we will discuss in detail all the stages of preparation, downloading the necessary files and the immediate process of installing new firmware. You will learn how to distinguish the Chinese version from the global version, where to look for official distributions and what to do if the screen goes out at the most inopportune time. For the Mi TV 4S model, it is critical to use firmware that corresponds to a specific region (CN or Global), since their mutual installation without modifications is impossible.
Diagnosis and preparation for system recovery
Before taking drastic measures, you need to make sure that the problem really lies in the software. Often users confuse hardware malfunctions of the matrix or power supply with software failures. If your Xiaomi Mi TV 4S makes sound, but the screen remains black, or the device is cyclically rebooted on the Mi logo, most likely, an intervention in the system partition is required.
The first step is to define your device exactly. There are different versions in the 4S lineup with different screen sizes (43, 50, 55, 65) and different motherboards. The firmware designed for the 55-inch version may not be compatible with the 43-inch version, even if they are in the same series.
It's also important to check the status of the peripheral devices. USB-Drives, external hard drives and game controllers before the procedure. Having extra devices in the ports can knock the boot process from the flash drive, and the TV will start looking for an update in the wrong place.
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Before starting any work with firmware, take a picture of the current network settings and Wi-Fi credentials - after resetting, they will have to be re-entered.
Make sure the remote is properly equipped with fresh batteries, and in some cases, when the touch buttons on the TV are missing or locked, the remote becomes the only tool to control the recovery process.
Selecting firmware version: Global vs CN
One of the most common problems for Xiaomi owners is the confusion between firmware versions. Devices imported from China are based on the MIUI for TV CN shell, which is sharpened for the Chinese service market. Global versions (Global) have built-in Google Play and support for many languages, including Russian. Trying to install global firmware on a Chinese TV (and vice versa) without special manipulation usually leads to a signature verification error.
If you have a Chinese version, and you want to Russify the interface, it's rare to simply replace files, often requiring unlocking the bootloader or installing a custom launcher, which is beyond the standard firmware, but if your goal is to just upgrade the current system to the latest stable version, you need to find a file that matches your region.
The official firmware files have a specific extension and naming structure. Xiaomi Mi TV 4S is relevant packages labeled as rom or bin depending on the installation method, and you should only download them from trusted resources, such as the official Mi Community forum or specialized portals like 4PDA, where moderators check files for viruses.
Note the Android version that the firmware is based on. Newer versions of the system may require more space in the internal drive. If the TV's memory is filled with garbage, the installation process can be interrupted by 90%, which can damage the system partitions.
Preparation of USB-drive and files
Quality and formatting USB-Xiaomi TVs are sensitive to the file system of the flash drive. To work properly, the bootloader must be formatted into the file system. FAT32. Formats NTFS or exFAT may not be readable during the preboot phase when the operating system is not yet active.
The volume of the flash drive also matters. It is recommended to use drives ranging from 4 to 16 GB. Too much memory (64 GB and above) the TV may not detect in recovery mode. In addition, the read speed should be high enough to avoid timeouts when transferring data.
☑️ Preparation USB-storage
Once you download the firmware archive, it needs to be properly unpacked. Often there is another archive or folder inside the archive. The update file (usually with the.bin or.zip extension) must lie at the root of the flash drive without being embedded in other directories. Some instructions require the file to be renamed update.zip, but for the Mi TV 4S, it is more common to use automatic recognition of the original name.
It is important to check the integrity of the downloaded file. If the download is interrupted or the file is damaged, the hash amount will not match the original, and the TV will refuse to start installing. Use the built-in OS tools or third-party utilities to check check checksums if there are doubts about the stability of the Internet connection.
Method of updating via USB-drive
The safest and most reliable way to reflash is to use USB-This method is independent of the state of the network modules of the TV and allows you to restore the device even if the system is partially damaged. USB-port, preferably in the connector with the marking USB 2.0, as they often have better compatibility with older bootloader drivers.
Once the drive is plugged in, turn off the TV completely, disconnecting it from the power grid for 10-15 seconds. Then, holding the power button on the TV body (not the remote!), plug in the power cable. Don't let go of the button until the Mi logo or Recovery menu appears. Some Xiaomi Mi TV 4S models require simultaneous clamping of the power buttons and the volume "minus".
What to do if the Recovery menu doesn’t appear?
When the recovery menu appears on the screen, the navigation is done by the volume buttons on the remote or the case, and the choice is confirmed by the on button. Select the Apply update from USB or similar. The system will start checking the file. If the file is not found, check the formatting of the flash drive and the correct location of the file.
The upgrade process can take anywhere from 5 to 15 minutes, and the progress bar will be displayed on the screen, at which time it is strictly forbidden to pull the power cord or remove the power cord. USB-storage device: interrupting the recording of data in memory NAND It can lead to irreversible consequences.
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Successful completion of the installation is accompanied by an automatic reboot and the appearance of the Android or Mi logo, followed by initial configuration.
Alternative methods: ADB and network updates
If the standard method is USB Inaccessible, you can use the tool ADB (Android Debug Bridge: This method requires connecting the TV to your computer via a local Wi-Fi or Ethernet network, and for this purpose, the “Debugging by Ethernet” option must be enabled in the settings of the TV. USB» (USB Debugging, which is only possible if the system is at least partially loaded.
The command to install firmware through ADB is as follows:
adb connect IP_ address television
adb sideload name file firmware.zipThis method is more flexible, but requires the presence of ADB drivers installed on the PC and basic command-line knowledge. It is often used by enthusiasts to install custom recaps, such as TWRP, which allow you to make full backups of the system.
Network Update (OTA) is a standard method that works through the Settings menu → About TV → System Update. However, if you are already looking for a way to flash it, most likely this method does not work for you or you want to roll back to an older version, which is impossible to do through OTA. Forced updates through a local file in the settings menu is an intermediate option that also requires a firmware file on the flash drive, but runs from a working system.
Using ADB allows you to not only update, but also remove system applications that cannot be removed by standard means, which is useful for cleaning the system from Chinese software (bloatware), which is often present in stock firmware.
Possible errors and ways to eliminate them
There are a number of errors that can occur in the flashing process, and one of the most common is "Error code 4" or a message that the file is not suitable, which means that the version is incompatible, and then you need to find the firmware file for your revision of the motherboard, and the information about the board is often indicated on the sticker next to the ports.
If the TV is stuck on the Mi logo, try resetting to factory settings via the Recovery menu (Wipe). data/factory This will delete all user data, but it can eliminate file conflict that interferes with downloading. If this does not help, you will need to flash through the file. UART-Console, which is a complex hardware procedure.
Why does the TV say "No Command"?
After flashing, the remote is solved by reconnecting Bluetooth. Press the Home and Back buttons at the same time to pair. If the remote doesn't respond at all, try controlling through the Mi Remote app on a smartphone connected to the same Wi-Fi network.
Below are the tabled errors and their solutions:
| Code/Error message | Probable cause | Decision |
|---|---|---|
| File not found | Wrong path or format of flash drive | Reformat to FAT32, file to root |
| Signature verification failed | Inconsistency of the firmware region | Download firmware for CN or Global version |
| Update failed (Error 4) | Damaged file or interruption | Download the archive, check it out USB-port |
| System partition full | Lack of space for temporary files | Clear the app cache before updating |
Remember that any manipulation of the software you do at your own risk. the manufacturer's warranty can be canceled if you find traces of interference in the system partition, especially when using informal methods.
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Use a network filter with protection against surges of voltage during firmware, so that a sudden power outage does not damage the TV memory.
Configuring after reinstallation of the software
Once the new firmware is successfully installed, the TV will start as new, and you will need to re-select the language, connect to Wi-Fi, and log into your Google account, so you need to take your time and read the terms carefully so you don’t need to install any extra apps.
Immediately after downloading, it is recommended to check for updates in the settings menu. Often, the firmware you installed is no longer the latest, and the system will suggest installing small security patches. Also, go to the About TV section and check the build number - it must match the version of the downloaded file.
To optimize the work of Xiaomi Mi TV 4S after flashing, it is recommended to disable unused services. In the section “For developers”, you can limit background processes, which will positively affect the speed of the interface. Be sure to also set the time and date if they are not updated automatically, as the wrong time can block the work of many streaming services.
⚠️ Warning: After flashing all Wi-Fi passwords and accounts will be deleted. Prepare the login details in advance so you don't waste time remembering them.
If you used Chinese firmware, the first thing to do is install a file manager and browser to be able to download the necessary APK-Application files that are not available in the Chinese store. For global versions, you just need to log into the Google Play Store.
Frequently Asked Questions (FAQ)
Can I flash the Chinese Xiaomi Mi TV 4S on global firmware?
How long does the reflashing process take?
Will my apps be deleted after the update?
Where to find the official firmware for Mi TV 4S?
What if the sound is lost after the sound is removed?
⚠️ Warning: If the TV is no longer responsive to any commands and is not in Recovery mode, the bootloader may be damaged.