How to Switch Xiaomi Mi TV 4A: Official and Custom Methods

Xiaomi Mi TV 4A remains popular thanks to the combination of affordable price and functionality based on Android TV. However, over time, even reliable equipment begins to slow down, give out errors or require updating to support new applications.

In this guide, we will analyze all the current methods of firmware for Mi models. TV 4A (including modifications 32" L32M5-5A, 43" L43M5-5A, 50" L50M5-5A You'll learn how to update over the Internet (OTA), manually USB-The storage device, and how to restore the TV if it stopped turning on after a failed firmware. T962 and MStar 6A928 — They can lead to the locking of the loader.

1. Firmware Preparation: What You Need to Know Before Starting

The firmware of a TV is not the same as upgrading a smartphone, there is no way to roll back quickly, and a bug can turn a device into a brick.

• 🔹 Model TV: Find a sticker on the back or go to Settings → About TV, firmware for Mi. TV 4A mi TV 4S non-interchangeable!
• 🔹 Current version of the software: Write down the build number (for example, V12.0.3.0.PFM). This will help you choose the right file to update.
• 🔹 Chipset type: Find out which processor is used in your model (Amlogic or MStar.
• 🔹 Backup: Save your Wi-Fi settings, accounts and installed app list – after you have installed them, you will have to reconfigure them.

If you plan to use informal firmware (such as ATV Custom ROM or CoreELEC), consider:

⚠️ Note: Firmware from third-party developers may disable support DRM Widevine L1, What will stop working Netflix, Disney+ And other high-resolution services, and there's also a problem with MStar chips. HDMI-Ports after installation of custom software.

Method 1: Air Update (OTA)

The easiest and safest method is automatic updates over the Internet, which is suitable if:

• 📶 The TV is connected to stable Wi-Fi (or Ethernet).
• 🔄 You want to upgrade to the latest official version of the software.
• ⚡ The device is turned on and works without critical failures.

Instructions:

1. Open Settings → About TV → Update system.
2. Click "Check Updates." If a new version is available, the system will prompt you to install it.
3. Confirm the download and wait until the end (the TV will restart automatically).

If the update is not available, try:

• 🔄 Reboot the TV and router.
• 🌍 Change the region to India or China (sometimes updates appear there earlier).
• ⏳ Wait 1-2 days – Xiaomi servers may temporarily limit the distribution of firmware.

💡

OTA-The update does not reset settings or remove applications, but requires at least 500 MB of free space on the internal memory.

Method 2: Manual update via USB

If OTA does not work or you want to install a specific firmware version (for example, roll back to a stable build), use USB-This method will also help if the TV is stuck on the logo or cyclically restarting.

You'll need:

• 🖥️ USB-flash-drive (FAT32, 32GB).
• 📁 Firmware file in.zip format (download only from the official Xiaomi website).
• ⚠️ Important: The file name must be the same as the TV model (e.g., the TV model, l43m5-5a_ota_update_V12.0.3.0.PFMINXM.zip).

Step-by-step:

1. Download the firmware and rename the file to update.zip (no spaces!).
2. Copy it into the root of the flash drive (not into the folder!).
3. Disconnect the TV from the network, insert the flash drive into the USB 2.0 port (usually marked as Service).
4. Press the Menu button on the remote and, holding it, connect the power.
5. After 5-10 seconds, the recovery menu will appear. Select Apply update from USB → update.zip.
6. Wait until it's finished (about 10-15 minutes) and the TV will restart automatically.

4. Method 3: Fastboot Firmware (for experienced)

This method is used if:

• 🔧 The TV is not turned on or downloaded only in Recovery Mode.
• 🛠️ Reflash the bootloader (for example, after a failed installation of custom firmware).
• 🔄 You need to return the stock firmware after experiments with modified software.

To run through Fastboot, you will need:

• 💻 Computer with Windows and installed drivers ADB/Fastboot.
• 🔌 Cable USB-A — USB-A (PC-connector).
• 📂 Firmware in.tgz format (downloaded from Xiaomi Firmware Updater).

Instructions:

1. Unpack the firmware in the folder with fastboot files (there should be files with.img extensions).


2. Connect the TV to the PC by holding the Menu button on the remote (to log into the Fastboot).




3. In the command line, do:




fastboot flash boot boot.img




fastboot flash system system.img




fastboot flash recovery recovery.img




fastboot reboot




4. wait for the reboot (can take up to 20 minutes).

⚠️ Note: On models with the MStar chipset 6A928 (Like Mi. TV 4A 32) Fastboot firmware can block the bootloader. CH341A repair.

5. Custom firmware: pros and cons

Informal firmware (e.g. ATV Custom ROM, CoreELEC or LibreELEC) allows:

• ⚡ Speed up the TV with an optimized core.
• 🎮 Install game emulators (including RetroArch for the NES/PS1).
• 🛡️ Remove built-in ads and unnecessary Xiaomi apps.
• 📺 Add Dolby Vision support (on some models).

However, there are serious shortcomings:

If you still decide to experiment, we recommend starting with CoreELEC - this firmware is the easiest to return stockware, since it does not affect the bootloader section.

💡

Before installing custom firmware, dump the current version using the adb pull /dev/block/mmcblk0 command to help restore the TV if something goes wrong.

6. Common mistakes and their solutions

Even if you follow the instructions, you can have problems.

• 🚫 Update failed Error Reason: Wrong firmware file or damaged flash drive Solution: Check the file name (update.zip) And format the flash drive again.
• 🔄 The TV got stuck on the Xiaomi logo Reason: Software version conflict or incomplete firmware Solution: Repeat firmware via Recovery Mode or Fastboot.
• 📵 Remote does not work after firmware Reason: Reset Bluetooth settings Solution: Reconnect the remote via Settings → DU remote → Add the device.
• 🔊 No sound through HDMI Reason: Resetting settings HDMI-CEC Solution: Go to Settings. → Sound. → HDMI ARC and turn the function on again.

If the TV doesn’t respond to buttons and doesn’t boot, try a hardware reset:

1. Shut down the power.
2. Press the Power button on your TV (not on the remote!) and hold for 15-20 seconds.
3. Connect the power without releasing the button before the logo appears.

7. Where to download firmware for Xiaomi Mi TV 4A

Use only verified sources to avoid viruses or corrupted files:

• 🔗 Official Xiaomi website https://new.c.mi.com/global/miuidownload/index Only stable versions of the software tested by the manufacturer are published here.
• 🔗 Xiaomi Firmware Updater https://xiaomifirmwareupdater.com/ All firmware versions archived, including beta builds, suitable for rollback to the old version.
• 🔗 Forum 4PDA https://4pda.to/forum/index.php?showtopic=900400 Here you will find custom firmware, instructions for unlocking the bootloader and solving specific problems.

⚠️ Note: On sites like NeedROM or XDA Developers often put out modified firmware without checking it. They may contain malicious code or unstable patches. Always check reviews before downloading!

FAQ: Answers to Frequent Questions