Disassembly of the Xiaomi Mi TV: from the back cover to the motherboard

Disassembling a Xiaomi Mi TV yourself is a task that scares many users, and the fear of damaging a fragile matrix, mixing up plumes, or running into hidden latches often stops even experienced craftsmen. But with the right approach and tools, the disassembly process becomes predictable and safe, and this guide covers all the key steps, from the preparation of the workplace to the removal of the motherboard, taking into account the characteristics of different generations of the Mi. TV (Mi TV 3 to Mi TV Q2 2023).

It is important to understand that the design of Xiaomi TVs has evolved: in the early models, the back cover was mounted on screws, and in new ones (for example, Mi). TV A2 43) plastic latches are used. We will take the generic steps and point out the nuances for specific series. If your goal is to replace the matrix, clean the dust, update the TV tuner or repair the power supply, this guide will help avoid typical errors and save on the service center.

Preparation for disassembly: tools and security measures

Before you start, make sure you have everything you need, and if you don't have at least one tool, you can damage the body or the internal components, and here's the minimum set.

• 🔧 Screwdriver cross (PH2) — For most of the propellers in Xiaomi Mi TV.
• 🔧 Plastic blades (or mediators) - to disconnect latches without scratches.
• 🧲 Magnetic mat or container – to avoid losing small screws.
• 📸 Smartphone with camera - for fixing the location of plumes and connectors.
• 🧤 Antistatic bracelet (optional but recommended for chip protection).

Pay special attention to the workplace: the TV should lie on a soft, flat surface (for example, on a bedspread or foam) with the screen down. Do not put it on a tabletop without protection - even a small grain of sand can scratch the matrix when pressed. OLED-screen (e.g., Mi) TV OLED 55), avoid pressure on the center of the panel - this is fraught with damage to the pixels.

⚠️ Warning: Before disassembling, disconnect the TV from the socket for at least 10 minutes. The capacitors in the power supply can retain charge, which will lead to an electric shock when accidentally touched.

If you are disassembling a TV for dust cleaning, prepare a compressed air cylinder and a soft brush. LED-You may need a soldering iron and a multimeter, and if you doubt your skills, you should contact the service, especially if you are talking about models with a high-quality lighting system. QLED-matrix, where an error in the assembly can lead to uneven illumination.

Removal of the back cover: screws, latches and hidden fasteners

The back cover of Xiaomi Mi TV It's attached by a combination of screws and plastic latches, and it depends on the model:

• 📺 Mi TV 3/4 (2016–2018): 8–12 perimeter screws, no latch.
• 📺 Mi TV 4S/4A (2019–2020): 6 screw + 4 top-latch.
• 📺 Mi TV 5/Q1/Q2 (2021–2023): 4 screw + latches around the perimeter (shoulder blades required).
• 📺 Mi TV OLED: screws hidden under rubber plugs.

Algorithm of action:

1. Unscrew all visible screws (usually located in the corners and middle of the sides). TV 5 Pro screws can be hidden under stickers - gently slap them with a knife.
2. If the lid is not removed, check for latches. Put the plastic blade in the gap between the lid and the body and carefully guide it along the perimeter, snapping the mounts. Start at the bottom (there is usually less risk of damaging the plumes).
3. In the Mi models TV Q2 55" and Mi" TV A2 the cover can "hold" on bilateral tape - pull it perpendicular to the body, without twisting.

⚠️ Attention: In the TVs Xiaomi Mi TV 4S 50" and similar under the lid may be a metal plate, screwed with additional screws. Do not try to remove it unnecessarily, it serves as protection against electromagnetic interference.

Once you remove the lid, take a picture of all the plumes and connectors. TV (Like Mi. TV (5) Frequently occurring:

• 🔌 The plume of the matrix (wide, usually at the bottom).
• 🔌 Power supply connector (black or white, with 4-6 contacts).
• 🔌 Antenna cable (coaxial, screwed to a TV tuner).
• 🔌 Infrared port plumes and LED-indicator (thin, at the top of the).

Access to motherboard and power supply

Once the back cover is removed, you'll see the main components of the TV. In most Xiaomi Mi models, you'll see the main components. TV The motherboard is vertical in the center or left, and the power supply is horizontal in the bottom. TV OLED, where the board can be integrated into the matrix frame.

To extract the motherboard:

1. Disconnect all plumes by gently pulling the plastic tongues (not by wires!) in Mi models TV 4A The matrix plume is fixed by a latch - it must be bent beforehand.
2. Unscrew the screws that attach the board to the case (usually 4-6 pieces). TV 5 Pro can be additional racks.
3. Keep the charge up carefully, holding it by the edges. Don't touch the chips and contacts!

Power supply in Xiaomi Mi TV It often causes breakdowns (for example, the TV doesn't turn on or the indicator flashes:

• Disconnect the power connector from the motherboard (usually a wide white connector with 4-6 wires).
• Check the multimeter voltage at the output of the block (should correspond to the marking, for example, 12V or 24V).
• Check the capacitors for bloating – this is a common cause of malfunctions in Mi models TV 3/4.

In the Mi models TV Q2 In 2023, the power supply and the motherboard are combined into one module - they can not be separated without a soldering iron.If your goal is to replace the power supply, make sure that the new module has the same revision (number indicated on the sticker).

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If the TV does not turn on after disassembly, check the connection of the power plume to the motherboard - in 30% of cases, the problem lies in poor contact.

Disassembly of the matrix and replacement LED-lighting

Access to the matrix is required to replace a broken screen, repair backlights or eliminate broken pixels.This is the most critical stage - an error here can lead to irreversible damage to the panel. TV matrix is attached to the frame by:

• 🔩 Screws (in models of Mi) TV 3/4).
• 🧲 Magnets (in Mi) TV 5 Pro and newer).
• 📏 Double-sided scotch (in Mi) TV A2 budgetary).

Procedure:

1. Remove the metal frame holding the matrix (usually mounted on 8-12 screws). TV OLED The frame can be glued – use a building hair dryer to heat the glue.
2. Disconnect the backlight plumes (thin white tapes with connectors) in models with Local Dimming (e.g. Mi). TV Q1) There can be up to 16 trains – mark them!
3. Carefully place the matrix with the screen up on the soft surface. Don't put it on hard objects, even light pressure can damage. TFT-layer.

For replacement LED-lighting:

• Remove the diffuser (thin plastic film above the lamps).
• Drink out faulty LEDs or replace the entire tape (in Mi) TV 4S A 30-60 diode tape is used).
• Check the chain with a multimeter - the resistance of the serviceable LED should be within 1.8-3.2 Ohms.

⚠️ Attention: In the TVs Xiaomi Mi TV QLED Replacing the backlight requires calibrating the colors after assembly, without special equipment (e.g. X-Rite). i1Display Pro) color distortions may occur.

Reverse Assembly: How to Avoid Common Mistakes

Building a TV after disassembly is no less important, typical errors that lead to breakdowns:

• ❌ Skewered back cover - can press on plumes and cause artifacts on the screen.
• ❌ Unconnected connectors are a common cause of lack of sound or image.
• ❌ Twisted screws - lead to cracks in the case or damage to printed circuit boards.
• ❌ Forgotten bilateral scotch - the lid will dangle, creating a backlash.

Proper assembly order:

1. Make sure all plumes are connected before clicking (in Mi models) TV 5 connectors may have fixtures).
2. Twirl the screws in reverse sequence, starting with the corner mounts (they hold the main load).
3. Before final assembly, turn on the TV in service mode (click Menu). + Volume Down on the remote at the same time) and check the matrix and speakers.

In models with Dolby Vision (for example, Mi). TV Q1) After assembly, you may need to reset the color settings:

Settings → Picture → Additional → Resetting image settings

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Always check the work of the TV before the final assembly - this will save time for re-disassembly.

Frequent breakdowns and how to prevent them

Analysis of service centers shows that 60% of the breakdown Xiaomi Mi TV They're associated with mishandling or misuse, and these are the most common problems and ways to avoid them:

If the TV turns on after disassembly, but there is no image, the reasons may be as follows:

• 🔍 The matrix plume is not connected (check the connector on the motherboard).
• 🔍 Damaged backlight (light flashlight on the screen - if the image is visible, the problem is in the LED).
• 🔍 The lighting inverter burned (characteristic of Mi) TV 4A).

In Android models TV 9.0+ (Like Mi. TV 5 Pro) may lose Netflix or Disney license after disassembly+. For recovery:

Settings → Applications → Resetting DRM licenses

When the disassembly will not help: cases for the service center

Not all breakdowns can be repaired by yourself.

• 💥 The TV does not respond to the power button and does not show signs of life (possible malfunction of the power controller).
• 🎨 Vertical or horizontal stripes appeared on the screen (matrix defect or T-KON board defect).
• 🔥 Smell the smell of burning - this is a sign of a short circuit, requiring diagnosis.
• 🔊 Speakers emit wheezing or squeaking (problem with amplifier or acoustic system).

In the Xiaomi Mi models TV OLED Replacing the array on its own can cause the controller to fail, as these panels require calibration on factory equipment. LED-lighting (e.g. Mi) TV Master – here the replacement of LEDs without special skills is almost impossible.

If you have disassembled the TV to update the firmware through USB-But the process ended in a mistake, don't try to repeat it many times:

1. Download the firmware from the official Xiaomi website (Support section).
2. Format the flash drive in FAT32.
3. Place the firmware file in the root of the drive (the name should match the model, for example, mi_tv_q2_2023.zip).
4. Put the flash drive in the port. USB 2.0 (commonly referred to as Service).

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Self-disassembly voids the warranty Xiaomi. If the TV is warranty, first contact the official service.

FAQ: Frequent questions about the Xiaomi Mi disassembly TV