How to flash a Xiaomi Mi TV 4S 32 inches: all ways + instructions

Xiaomi Mi TV 4S 32 (model L32M5-5ARU) is a popular budget Smart TV with PatchWall system based on Android TV. Over time, its firmware can become outdated, slow down or contain bugs. Software update solves these problems, but not all users know how to do it correctly.

The firmware of the TV is not complicated, but requires attention to detail. Errors can lead to a "brick" device (complete failure), so it is important to follow the proven instructions. In this article, we will discuss all the available ways to firmware Mi TV 4S 32: from automatic updates over the Internet to manual installation via USB. You will also learn how to prepare for the process, where to download official files and what to do if something goes wrong.

1.Why upgrade the firmware on Xiaomi Mi TV 4S 32 inches?

The manufacturer regularly releases updates for the Mi TV 4S, and here’s why it’s worth installing them:

• 🚀 Improved performance: new versions optimize the work of the Amlogic processor Cortex-A53, eliminate lags in the interface.
• 🛡️ Fixing Vulnerabilities: Closing Security Gaps, Particularly Important for Smart TV internet-connected.
• 🎮 Support for new apps: for example, updated versions of Netflix, YouTube or gaming services (Google Stadia, NVIDIA GeForce NOW).
• 🔊 New Sound and Image Features: Adding Modes HDR, Improved processing of Dolby Audio.

However, not all updates are equally useful. Sometimes new versions bring unexpected bugs, such as problems with Wi-Fi or sound, so before you start firmware, you should check the reviews on forums (for example, 4PDA or the official Xiaomi website).

If your TV is stable but you want to get new features, upgrade, and if the device is “glutting” after the last update, you may want to roll back on the previous version (we will talk about this below).

2. Preparation for firmware: what to do in advance

Incorrect preparation is the main cause of failures when updating. Follow this checklist to avoid problems:

Check the current version of the software in Settings → About TV

Download the firmware only from the official source (links below)

Connect the TV to the UPS (uninterruptible power source)

Shut it down. USB-devices (flash drives, keyboards, mice)

Record the current sound/image settings (photo on phone)

-->

Pay special attention to the power supply. The Mi TV 4S 32 consumes up to 50 watts in peak mode, and if electricity is lost during the firmware, the device can turn into a "brick." Use a UPS or at least make sure that the socket does not "knock out" when loaded.

Also check for free space on the internal memory. Update requires at least 500 MB of free space. If there is not enough space, remove unnecessary applications through Settings → Applications.

⚠️ Note: If you use custom firmware (unofficial), you won’t be able to upgrade “over the air” and you will need to reset completely to factory settings before installing official software.

Method 1: Automatic update via the Internet (recommended)

The easiest and safest method is to upgrade through the built-in system, which is suitable for most users if:

• 🌐 The TV is connected to stable Wi-Fi or Ethernet.
• 🔋 Charge (if a portable battery is used) at least 50%.
• 📦 There is enough free memory on the TV.

Instructions:

1. Open Settings → About TV → Update system.
2. Click Check for updates.
3. If a new version is available, select Download and Install.
4. Wait until the TV is finished (the TV will restart automatically).

The process takes 10 to 30 minutes depending on the speed of the Internet. Don't press buttons on the remote or turn off the TV during installation!

💡

If the update is stuck during the download phase, try reconnecting to the network or using an Ethernet cable instead of Wi-Fi.

Method 2: Manual update via USB (for power users)

If the automatic update doesn’t work (for example, due to slow internet or regional restrictions), you can manually install the firmware via a flash drive, which will also help if the TV doesn’t turn on but responds to the power button.

You'll need:

• 🖥️ Computer with Internet access.
• 💾 USB-storage device (formatted in FAT32, up to 8 GB).
• 📄 Official firmware for Mi TV 4S 32 (model L32M5-5ARU).

Step 1. Download the firmware.

The official firmware files for Xiaomi Mi TV 4S are available on the support website:

• Xiaomi official website (Support section)
• Xiaomi Firmware Updater (unofficial archive)

Look for a file with a.zip extension and a name that contains L32M5.

Step 2. Prepare the flash drive.

1. Format. USB-storage FAT32 (Use the Rufus tool or standard Windows formatting).
2. Copy the downloaded.zip file of the firmware into the root directory of the flash drive (not into the folder!).
3. Rename the file to update.zip (required!).

Step 3. Install the firmware

1. Put the flash drive in. USB-TV port (it is recommended to use the port) USB 2.0 on the back).
2. Go to Settings → About TV → System Update → Update via USB.
3. Select the update.zip file and confirm the installation.
4. Wait until the end (the TV will restart 1-2 times).

⚠️ Warning: If the TV is stuck on the Mi logo after the upgrade, don't panic. Wait 10-15 minutes - sometimes the first load takes a long time. If the screen stays black longer, try resetting to factory settings (Reset button on the back).

5. Method 3: Reverse to the previous firmware version

If after the update the TV began to work worse (brake, Wi-Fi is not turned on, sound is lost), you can return the previous version of the software.

Step 1. Find the old firmware.

The archive of older versions is available on Xiaomi Firmware Updater. Select the L32M5-5ARU model and download the desired version.

Step 2. Install via USB

The process is identical to manual updates (see previous section), but with two nuances:

• 🔄 After rollback, the TV may require a reset (all apps and data will be deleted).
• 🔒 Some new features (e.g. support for new video codecs) may stop working.

Step 3: Block Automatic Updates

To prevent the TV from spontaneously updating:

1. Go to Settings → About TV → System Update.
2. Turn off the option of Automatic Update Check.

Possible errors and their solutions

Even with the right firmware, you can have problems, and here are the most common ways to fix them:

• 🔴 The “Update failed” error when installing USB Causes: corrupted firmware file, incorrect file name, or incompatible model Solution: Download firmware, check name (update.zip) and TV model.
• 🖥️ The TV will not turn on after you have firmware Reason: interrupted update or incompatible version of the software. Solution: Try reset via the Reset button (clamp for 10 seconds). If it does not help, you need to flash it through Fastboot (see below).
• 📶 No sound or image after update Cause: Failure in settings HDMI Solution: Reset the sound/image settings to the factory or complete reset.

If the TV doesn’t respond to buttons at all, you may need firmware via Fastboot.This method is more complicated and requires a PC with ADB and Fastboot drivers installed. Detailed instructions for the Mi TV 4S can be found on XDA Developers (look for the theme on the L32M5 model).

💡

If the TV doesn’t turn on after a bad firmware, DO NOT try to disassemble it yourself. Contact Xiaomi Service Center – they have special tools to restore the “brick” devices.

7. Alternative firmware: is it worth the risk?

In addition to the official firmware, you can find custom (modified) versions of the software for Mi TV 4S. They promise:

• ✅ Removing embedded advertising in PatchWall.
• ✅ Unlock additional features (e.g. root access).
• ✅ Install Google Play Store (if not in your version).

However, custom firmware has serious disadvantages:

• ❌ Loss of warranty (Xiaomi does not support unofficial software).
• ❌ Risk of unstable operation (hangs, overheating, application errors).
• ❌ Security vulnerabilities (modified software may contain malware).

If you still decide to try custom firmware, use proven sources:

• XDA Developers (Section of Xiaomi Mi TV)
• 4PDA (theme from Mi TV 4S)

⚠️ Warning: Install custom firmware can permanently block access to official updates through OTA. The original software will only be returned via Fastboot, and this is not always guaranteed.

FAQ: Frequent questions about Xiaomi Mi firmware TV 4S 32