Modern Smart TVs from Xiaomi, running on Android TV or proprietary shell PatchWall, require regular maintenance of software. Users often face the need to flash flash when the standard air update does not work or the new version of the system contains critical errors. The process of replacing firmware on models with a diagonal of 43 inches and above requires special care due to the volume of data.
Manual installation not only restores the device to work, but also changes the region by eliminating restrictions on access to certain applications. However, interference with the system partition carries risks: improper actions can turn the screen into a brick. In this guide, we will discuss the safe methods tested on the models of the Mi TV 4A, 4S, P1 and Q1 series.
Before you start taking action, you need to be clear about the difference between a regular update and a full flashing: the first only complements existing files, the second completely rewrites the system partition. Backup data in this case is not possible with standard means, so save Wi-Fi passwords and account lists.
Preparation of equipment and diagnostics
The initial stage requires careful preparation of the physical medium and the TV itself. USB-8 to 32 GB storage device formatted into a file system FAT32. Using large memory cards (64GB or higher) often leads to loader reading errors on older models.
Check the exact model of your device. This information is on the sticker on the back of the case or in the Settings menu → About the TV. Loading an inappropriate firmware file, even with a similar model name, can lead to incompatibility of the display drivers or the Wi-Fi module.
- 🔌 USB-flash-drive 8-32 GB formatted in FAT32.
- 💻 Computer with Internet access to download the system image.
- 📺 Remote control with working navigation and confirmation buttons.
- 🌐 Stable connection to the power grid without the risk of sudden shutdown.
⚠️ Warning: Make sure the battery is strong enough, or use wired connection mode if your Xiaomi Mi model is in the right position. TV Stick or Box supports power from the external network during the procedure.
Search and check firmware compatibility
Finding the right file is the most crucial thing. Xiaomi official sources are often hidden in the depths of the menu or require a specific account region. For manual installation, it is better to use proven resources, such as 4PDA or the official Mi Community forum, where files are marked as stable.
Pay attention to the Android version and build release date. Installing an older version on top of the new (Downgrade) is often blocked by the security bootloader. If you are trying to roll back, you may need to use Fastboot mode or a special UART engineering cable, which is beyond the scope of this instruction.
A firmware file usually has a.zip or.pkg extension and weighs between 1 and 2.5 GB. After downloading, be sure to check the integrity of the file by comparing its checksum (MD5 or SHA1) with the one listed on the source site. A damaged archive is a frequent cause of 99% process freeze.
Where to find the exact version of the firmware?
Instructions for installation via USB-drive
Once the files are ready, you need to place them correctly on the media. Copy the firmware file into the root directory of the flash drive without putting it in folders. mi_tv_upgrade.zip, PatchWall versions recognize the original name automatically.
Turn off the TV completely by disconnecting the power cord from the socket on 10-15 It's necessary to reset the capacitors and clean the memory cache. USB-portable USB 2.0 (It is usually black, as the blue ports are USB 3.0 may not be determined by the loader in recovery mode.
☑️ Algorithm of actions during installation
Press the power button on the TV body (not the remote) or OK + Back combination, and hold it, connect the power cable. The Mi logo or the Recovery menu should appear on the screen. If a menu appears, select Apply upgrade from USB and confirm the choice.
| Model TV | File type | USB port | Action. |
|---|---|---|---|
| Mi TV 4A/4C | .zip | USB 2.0 | Holding the power button |
| Mi TV P1 | .pkg | USB 3.0 | Recovery menu |
| Redmi Smart TV | .zip | Anybody. | Automatic detection |
| Mi Box S | .zip | MicroUSB (via PC) | Fastboot mode |
Alternative method: ADB and debugging over the network
For advanced users with access to the developer menu, there is a method of installing through ADB (Android Debug Bridge), which allows you to install firmware directly from your computer, bypassing the limitations of the USB file system. You will need to install ADB drivers on your PC and enable debugging in the Settings → About TV → Build (7 times).
Connect your TV and computer to the same Wi-Fi network. Enter the connection command at the command line: adb connect IP_TV address:5555. After a successful connection, you can send a command to install an apk shell file or system package if it is signed with the correct keys.
adb install -r path_to_firmware.apkUsing ADB provides more control, but requires high skill. An error in the team's syntax can lead to the removal of system partitions, a method more often used to remove ads or install custom launchers than to completely replace firmware.
⚠️ Note: When connecting to ADB The antivirus on your computer can block the connection. temporarily disable the protection or add the adb.exe process to the exceptions.
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Use ADB command prompt only if you are sure of the source of the file.Installation of modified system apk from unknown sites may contain malicious code.
Possible mistakes and ways to solve them
In the firmware process, standard situations often arise that don't always mean a break. If the TV says "File not found," check the flash drive file system. NTFS or exFAT format is not supported by the bootloader, only FAT32 with the default cluster size.
Hanging on the Mi logo after an update can indicate an application cache conflict, in which case logging into Recovery mode and selecting Wipe data/Factory reset helps. This action will delete all user data, but often saves the system from cyclical reboot.
- 🚫 Error 105: Incompatibility of the bootloader and firmware version.
- 🚫 Error 44: A damaged system image file.
- 🚫 Error 22: Not enough space in the internal partition (rarely).
If the screen goes out and the display lights up but the image is not, it may be that the firmware is designed for a different matrix, and owners of TVs with different arrays (e.g. CSOT vs. Innolux) should be especially careful when choosing a version of the software, even for the same model.
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If you lost sound or Wi-Fi after the firmware, chances are you installed global firmware on the Chinese version of the TV without changing the region or vice versa.