If you are faced with the designation Xiaomi BM46 And you're not alone in trying to figure out which model of TV you're talking about, and this labeling is often confusing, and it can be found in documents, on boxes, on service menus, or even in firmware names. BM46 It is not an independent model, but denotes the mainboard of the Mi series. TV 4S/4A/4X diagonally 43–50 inches released in 2020–2023 years.
In this article, we will discuss in detail:
- 🔍 What does the abbreviation mean? BM46 And what kind of TVs does it belong to?
- 📺 How to accurately determine your model by marking on the case or in the menu
- ⚙️ Technical features of the platform and compatibility with firmware
- ⚠️ Typical Problems and How to Avoid Errors When Buying Parts
We will pay special attention to the differences from similar series (BM43, BM50), So that you do not confuse components during repair or upgrade.
What is Xiaomi? BM46: deciphering
Marking BM46 — This is the internal code of the motherboard that Xiaomi installed in the TV budget and medium range:
- B – series of boards for televisions (from the English Board)
- M - modification for the Mi market TV (unlike Redmi. TV, r)
- 46 is a conventional board number indicating the range of supported diagonals (in this case 43-50 inches).
It is important to understand that BM46 — It's not a TV model, it's a component that can be used in different devices:
- 📺 Mi TV 4S 43" (model L43M6-6ARG)
- 📺 Mi TV 4A 50" (model L50M6-6ARU)
- 📺 Mi TV 4X 43" (model L43M6-6AIN)
At the same time, the externally TVs may differ in the design of the case or legs, but the "stuffing" they have is identical.
How to determine the exact model of your TV
If the box or documents are only BM46, If you need to know the full name of the model, use one of the methods:
1. View the sticker on the back panel
On the back of the TV (usually at the bottom right) there is a white or silver sticker with full labeling.Look for a line that starts with the letter L (e.g., the letter L, L43M6-6ARG). This is the official name of the model.
2. Go to the service menu
Open the sequence on the remote:
Settings → On TV. → ModelThe full name will be displayed here, for example: Mi TV 4S 43" (L43M6-6ARG).
Checking a check or guarantee card
Take a picture of the serial number (SN) Check out the Xiaomi website
Compare the appearance with the catalogue on 4PDA AliExpress.
Use the "Mi Home" app to scan your device-->
3. Check through ADB-Team (for advanced users)
If the TV is connected to the PC ADB, execute:
adb shell getprop ro.product.modelThe answer is an exact model, for example: l43m6-6arg.
⚠️ Attention: Don't confuse BM46 s BM43 or BM50! The last two boards are designed for TVs with a diagonal of 32-40" and 55-65" respectively.
Technical characteristics of the platform BM46
Payment BM46 It is based on the Amlogic chipset. T962 (4-core processor Cortex-A53 clock speed up to 1.5 GHz) and has the following key parameters:
| Parameter | Meaning |
|---|---|
| Processor | Amlogic T962 (4× Cortex-A53, 1.5 GHz) |
| Graphics | Mali-450 MP3 (up to 750 MHz) |
| RAM | 1.5-2 GB (depending on the TV model) |
| Flash memory. | 8–16 GB (eMMC 5.1) |
| Support for authorization | Do 4K (3840×2160) upon 60 Hz |
Features of the platform:
- 🔄 Support for Dolby Audio and DTS-HD (But without Dolby Vision)
- 📶 Built-in Wi-Fi module AP6256 (2.4/5 Hz and Bluetooth 4.2
- 🖥️ 2 port HDMI 2.0, 1 USB 2.0, optical output S/PDIF
- 🔌 Power: external unit on 12V/2.5A (connector) 5.5×2.1 mm)
💡
If your TV is paid BM46 playback 4K-Content, try to disable the function "AI Super Resolution in the image settings. This will unload the processor and eliminate the slowdowns.
Compatibility with firmware and modifications
One of the main problems of TV owners with pay BM46 It's a firmware incompatibility between different models. TV 4S 43's not good for Mi TV 4A 50" even if they have the same pay, it's because of the differences in the:
- 📱 Matrix panels (different manufacturers and controllers)
- 🔊 Audio systems (power of speakers, presence of subwoofer)
- 📡 Tünerach DVB (T2/C or T2)
To avoid “bricking” the TV, when choosing firmware, focus on the full model name (for example, L43M6-6ARG), You can download your firmware files exclusively from official sources:
- 🌐 Official Xiaomi website (Support section")
- 📁 Topics on 4PDA (with verified links from moderators)
- 📦 GitHub repositories (for custom firmware such as OpenTV)
⚠️ Note: Firmware from unofficial sources (for example, torrent trackers) may contain viruses or be collected for another revision of the board.Be sure to check build.prop your current version with the new version before installing it.
How to check the firmware version without a remote?
Typical problems and solutions for BM46
Owners of pay-TVs BM46 Often encounter the following failures:
| Problem. | Possible cause | Decision |
|---|---|---|
| Not turned on (red light flashes) | Firmware failure or power supply | Fly through. USB replace the power supply |
| No image, but there's sound. | Problems with the matrix plume or T-CON pay-off | Check the connection of the plumes or replace T-CON |
| Self-involved reboots | Processor overheating or RAM malfunction | Clean dust, replace thermopaste or memory |
| Wi-Fi/Bluetooth is not working | Antenna dump or module failure AP6256 | Replace the antenna or replace the module |
If the TV stopped turning on after the update, try rolling back to the previous firmware version through USB-It's a storage device:
- Download the desired version of the software (for example, mi_tv_firmware_2.1.56.zip).
- Unpack the archive and copy the file update.zip flash-root (FAT32).
- Insert the flash drive into the TV turned off and hold the Menu button on the case for 10 seconds.
💡
Before any firmware manipulation, disconnect the TV from the network for 5 minutes - this will drop the residual charge in the capacitors and prevent damage to the board.
Differences BM46 from other Xiaomi boards
So you don't get confused. BM46 With similar fees, note the key differences:
- 🆔 BM43 — for TVs 32-40" (Amlogic chipset) T950, weaker).
- 🆔 BM50 — for 55-65” (Amlogic chipset) T972, Support for Dolby Vision).
- 🆔 RM46 — analogue BM46, but for the Redmi line TV (differs in firmware and a set of pre-installed applications).
Visually, the boards are different:
- 🔧 BM46 Has 2 RAM slots (but usually only 1 is occupied).
- 🔌 The connector for connecting the matrix is located closer to the center of the board.
- 📶 Wi-Fi antenna soldered to the right (y) BM50 — left).
When buying parts, always check the photo of the board with your device, even if the seller specifies BM46, may be nuanced:
- 🔄 Various fee audits (e.g, BM46 v1.2 vs v2.0).
- 🔌 Differences in connectors for connecting an infrared receiver.
- 📡 Different versions of the tuner (for example, T2/C or T2).
Where to buy spare parts for BM46
If you need to replace a board, matrix or other components for BM46, Contact the verified sellers:
| Parts. | Where to find | Average price (2026) |
|---|---|---|
| Maternity pay BM46 | AliExpress, eBay, local service centers | 3 500–6 000 ₽ |
| Matrix 43” (e.g, V430HK1-T07) | Specialized stores (for example, "Screen Service") | 8 000–12 000 ₽ |
| Power supply (12V/2.5And) | AliExpress, Ozon, Wildberries | 800–1 500 ₽ |
| T-CON fee | Groups in Telegram for repair of TV | 1 200–2 500 ₽ |
When buying on AliExpress, pay attention to:
- 📦 Seller rating (not lower than 98%) and number of sales.
- 💬 Photo reviews (check to make sure the fee matches visually).
- 🔄 Availability of a guarantee (minimum 3 months).
⚠️ Attention: There are many counterfeit boards on the market BM46 These cards often fail after 1-2 months. Ask the seller for a picture of the back of the board before you buy, the original must have clear markings of the components.