M1804S3DG Xiaomi: What is the model of the TV and how to identify it?

If you are faced with labeling M1804S3DG You can't figure out which model it is -- you're not alone -- it's a very confusing acronym, because it doesn't match the usual names like Mi. TV 4A or Mi TV P1. Actually. M1804S3DG — This is an internal factory code that hides a specific modification of the TV from the Xiaomi line, released in 2018.

In this article, we will discuss in detail what this marking means, how to determine the exact model of your device, and what it means. M1804S3DG It's different from other TVs in the brand, and you'll also learn where to look for this information on the body. TV, How to check it through the settings menu, and what key features are specific to this series, will help to avoid errors when buying parts, firmware or setting up the device.

What does marking mean? M1804S3DG?

Code. M1804S3DG — This is the internal model designation that Xiaomi uses to identify TVs in production and service centers:

• 📅 M1804 — year and month of development (April 2018) This indicates that the TV is from the first generation of the Mi. TV 4 or Mi TV 4A, issued that year.
• 🔢 S3 — A series or modification (third revision in the line) often denotes hardware changes, such as a different processor or type of backlight.
• 🌍 DG — regional code, where D usually stands for Dachshund (European market) and G stands for a specific country (e.g. Germany or the common European standard).

It is important to understand that M1804S3DG — It's not the end-user model name, but it's sold in stores under different names, like, for example, the TV:

• 📺 Xiaomi Mi TV 4A 43" (if diagonal 43 inches)
• 📺 Xiaomi Mi TV 4 55" (for 55-inch versions)
• 📺 Xiaomi Mi TV 4S (in some regions)

To determine exactly which model it is, you need to check the labeling against the match table or check the data in the menu of the TV, more about this in the next section.

How to find out the exact model of the TV M1804S3DG?

If the back of your TV is written M1804S3DG, But you don’t know which model is from the Xiaomi catalog, there are several ways to find out:

1. You can see the sticker on the case, and it's usually next to the factory code, and you can see a consumer model, like, Mi. TV 4A 43" or "or LE43M5-AZ (European market).
2. Check the settings menu. Go to Settings. → On TV. → The model. It might say, for example, LMDQ43M5-AZ — That's the real name.
3. Check documentation: instructions or warranty cards often duplicate both the factory code and the consumer name.

For convenience, we have compiled a table of correspondence M1804S3DG Real-life Xiaomi models:

Please note: if there is a hyphen with numbers at the end of the code (e.g, M1804S3DG-55), This indicates the exact diagonal of the screen. Without a hyphen, the code can be of multiple sizes.

⚠️ Note: Some sellers in the secondary market only specify the factory code without specifying the actual model.This may lead to the purchase of the wrong part (for example, a matrix or power supply!

Technical characteristics of TVs with code M1804S3DG

Televisions marked M1804S3DG The company is in the budget and mid-segment Xiaomi 2018-2019:

• 📺 Screen type: VA-resolution panel 3840×2160 (4K UHD) model 50" and 55", 1920×1080 (Full HD) for 43-inch-version.
• 🖥️ Processor: Amlogic T962 (4 cores Cortex-A53) or MStar 6A928 (depending on the modification).
• 🎮 RAM: 2 GB DDR4, In-built memory – 8 GB of eMMC.
• 🔊 Sound: 2 dynamics of 8-10 W, support for Dolby Audio and DTS-HD.
• 📶 Network: Wi-Fi 802.11ac (dual antenna, Bluetooth 4.2, 3 ports HDMI 2.0.

Features of firmware:

• 🤖 It runs on PatchWall (Xiaomi shell for Android) TV 8.1 or Android 9).
• 🔄 Supports OTA-updates, but for some regions (e.g. Europe) they may be delayed.
• 🛠️ The ability to manually run through USB (files with the extension.zip or.img).

Compared to newer models (e.g., Mi) TV P1 or Mi TV Q2), television M1804S3DG have:

• ✅ Lower price in the secondary market.
• ❌ Lack of support HDMI 2.1 and 120 Hz.
• ❌ Less bright backlight (maximum 250-300 nits).
• ✅ Simple disassembly for repair (no adhesive joints of the body).

⚠️ Note: If you are planning to use this TV for games PS5 Xbox Series X, please note that due to the lack of HDMI 2.1 not available 4K@120Hz and ALLM. Maximum — 4K@60Hz play-lag.

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If you have a TV M1804S3DG Slowly running, try resetting it to factory settings via Settings → The device → Reset.It often solves brake problems after updates.

Differences M1804S3DG from other Xiaomi models

So you don't get confused. M1804S3DG With other Xiaomi TVs, note the key differences:

Main advantages M1804S3DG older models (e.g., the Mi) TV 3S):

• 🔹 Support 4K (mi TV 3S Full only HD).
• 🔹 More modern remote with voice control (included).
• 🔹 Possibility to install apps via Google Play (in Mi) TV 3 was a limited store).

This is where the new TV sets are (for example, Mi). TV Q2 2023):

• 🔸 No Dolby Vision and Atmos.
• 🔸 Lower brightness and contrast.
• 🔸 An outdated version of Android TV (There is no support for new apps, such as Disney.+ into 4K).

Where to look for markings M1804S3DG TV-wise?

Factory code M1804S3DG You can find it in several places:

1. The back panel is usually located at the bottom right (near the ports). HDMI). Look for a white or silver sticker with fine print.
2. The barcode label often duplicates both the factory code and the serial number.
3. Settings menu. Pathway: Settings → On TV. → Model information, which may indicate either M1804S3DG, or consumer name (e.g., consumer name, LE43M5-AZ).
4. Documents: In the warranty card or instructions (usually on the last page).

If the label is worn or missing, try the following methods:

• 🔍 Remove the back cover (unscrewing 4 screws) - the code can be applied to the metal case.
• 📱 Install the app AIDA64 or TV Google Play Settings – It will show you the full model information.
• 🖥️ Connect the TV to the computer ADB and execute the command: adb shell getprop ro.product.model This will display the exact model.

⚠️ WARNING: If you're taking apart a TV to look for markings, be sure to unplug it 10 minutes before.

Take a photo of the code sticker|Check the screen diagonal.|Check the serial number in the Xiaomi database|Check the matrix compatibility table|Buy part only from official suppliers-->

Compatibility of Firmware and Spare Parts for M1804S3DG

One of the most common questions of TV owners M1804S3DG — Can I install firmware from another model or use spare parts from Mi? TV 4S/Mi TV 5. The answer depends on the specific modification:

• 🔄 Firmware: You can only install files that are designed for your exact model (e.g., your exact model, LE43M5-AZ). Firmware from Mi TV 4A 55's not good for Mi TV 4 43" even if they have the same code M1804S3DG.
• 🔧 Matrixes: Compatible only with screens of the same diagonal and backlight type. TV 4A 50's not good for Mi TV 4 55".
• ⚡ Power supplies: You can replace them with similar power (for example, for a 43-inch model, a 60-80 W PD is suitable for a PD).
• 🔊 Dynamics: Universal for all models of the Mi series TV 4/4A (connector and impedance are the same).

Where to download the correct firmware?

• 🌐 Xiaomi official website (support section for your region).
• 🔗 Forums 4PDA XDA-Developers (seek themes from the exact model, for example, LE43M5-AZ).
• 📧 Upon request to the Xiaomi service center (serial number is required).

Example of firmware name for M1804S3DG (LE43M5-AZ):

mi_tv_4a_43_international_00100100.00000000_20220315.zip

⚠️ Note: Install firmware from another model (for example, from Mi) TV 4S on Mi TV 4A) This could cause a TV to crash, check the serial number before you run the firmware.

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The firmware must match not only in code. M1804S3DG, but also according to the exact model (for example, LE43M5-AZ or LMDQ55M5-AZ).

Frequent problems and solutions for M1804S3DG

Coded TVs M1804S3DG, And yet, despite being reliable, they have a number of common problems, and these are the most common ones and the ways to fix them:

• 🔴 It doesn't turn on (red light flashes) Cause: Power supply or motherboard malfunction. Solution: Check capacitors for PD (bloated to replace). If the circuit board is a problem, you need to flash through the capacitors. USB (file bootloader.img).
• 📺 No image, but there's sound. Cause: Damage to the plume of the matrix or the panel itself. Solution: Take apart the TV and check the connection of the plumes. If the matrix is broken, replace (price) ~30-50% of the value TV).
• 🔊 No sound through HDMI. Reason: Resetting sound settings or port damage Solution: Go to Settings → Sound. → Exit HDMI choose PCM. If not, check the port multimeter.
• 🌐 It does not connect to Wi-Fi. Cause: Outdated firmware or Wi-Fi module failure Solution: Update the software via USB or reset network settings (Settings) → Network → Reset).

If the TV does not respond to the remote control:

1. Check the batteries (even if the indicator on the remote is on).
2. Reboot. TV, disconnect from the network for 1 minute.
3. Reset the remote: pinch the Menu + Home for 10 seconds.
4. If it doesn’t help, try to manage through the Mi Remote app on your smartphone.

You can use a service menu to diagnose hardware problems.

1. Turn off the TV.
2. On the remote, press sequentially: Menu → Up → Up → Down → Down → Left → Left → Right → Right.
3. Turn it on. TV — menu with matrix, sound and ports tests.

⚠️ Warning: Do not change the settings in the service menu unless you are sure of their value! Incorrect settings can damage the matrix or power supply.

FAQ: Answers to popular questions