Step-by-step dismantling of Xiaomi Redmi Note 8T: from the lid to the motherboard

Xiaomi Redmi Note 8T is a popular smartphone with good repairability, but its disassembly requires care. Unlike flagship models, there are no complex cooling systems or multi-component modules, but the risk of damage to the plumes or tear off the battery contacts remains. This article will help to disassemble the device without consequences – from tool preparation to motherboard extraction.

We're going to look at not only the standard procedure, but also the typical novice errors that cause a display or camera to fail, like forgetting to turn off the battery before running a board, which can be a short circuit, and you'll learn how to properly remove the duct tape under the battery without damaging the flexible plumes.

If you're planning to replace a screen, battery or speaker, this will be your guide. For complex repairs (such as soldering chips), it's best to contact a service center, but basic operations - like disassembling the case or replacing the charging connector - are quite possible even for beginners.

Preparation: security tools and measures

Before disassembling the Redmi Note 8T, make sure you have everything you need. Using the wrong tools is the main cause of damage. For example, metal blades can scratch the body, and too thick mediators can break the latches.

Here is the minimum set you will need:

• 🔧 Set of screwdrivers (cross-haul) PH00, flat 1.5 mm, five-pointed Y00 screw-tray SIM)
• 📱 Plastic mediators (2-3 pc, thickness 0.1–0.2 mm) or special shoulder blades for smartphones
• 🔥 Dryer or thermo-air station (to soften the glue under the lid and battery)
• 🧲 Magnetic mat or screw container (so as not to lose small details)
• 🔋 Insulation or capron screeds (to fix plumes and prevent them from breaking)

Also, prepare your workspace: it should be well lit, free of dust and moisture. Work on a table with a soft substrate (like a silicone mat) so that you don't scratch the screen or body. If you're taking your smartphone apart for the first time, take a picture of each step, which will help you get the device back together properly.

⚠️ Warning: Don't use knives or screwdrivers to lid the lid! Metal can damage plastic latches, which will lead to a backlash of the case after assembly. Plastic mediators are safer, but require patience.

Removing the back cover: how not to break the latches

The back cover of the Redmi Note 8T is mounted on latches and glue, and the challenge is to heat the glue evenly without overheating the body, and if the temperature is too high, the plastic can deform and the glue can harden and become brittle.

Algorithm of action:

1. Turn off your smartphone and remove the tray. SIM-cards (use a paper clip or special key).
2. Heat the edge of the lid with a hair dryer around the perimeter for 1-2 minutes. Keep the hair dryer at a distance of 5-7 cm, the temperature is not higher than 80 ° C.
3. Insert a plastic mediator into the gap between the lid and the case (start at the bottom edge, next to the USB-C connector).
4. Carefully drive the mediator along the edge, snapping the mounts. Don't force it -- if the lid doesn't respond, warm it up again.

Once you remove the lid, you'll see the internal structure: the battery, motherboard, camera and plumes. Don't touch the metal parts of the board with your bare hands - static electricity can damage the chips. If you plan to work with the device for a long time, ground yourself (for example, touch the heating battery).

Battery shutdown: Why it's critical

Before any manipulation of the board, be sure to turn off the battery. In the Redmi Note 8T, it is connected via a JST 1.0 connector (a small white connector next to the battery). If you do not disconnect it, the risk of short circuit when you touch the board is almost 100%.

How to turn off the battery correctly:

• 🔌 Carefully tuck the connector into a plastic spatula (not metal!) pulling by the black tongue, not the wires.
• 📝 Lock the connector with a tape so that it does not touch the board during work.
• ⚡ If the battery is swelling, don't try to remove it yourself.

After the battery is turned off, check the voltage on the board contacts with a multimeter (if you can). It should be 0 V. If there is a voltage, then the battery is not completely turned off, or there is a contact somewhere.

⚠️ Warning: If you accidentally close the board before the battery is turned off, the smartphone may not turn on, in which case you will need a diagnosis at the service center - the power controller may have burned down.

Extraction of the motherboard: the procedure for action

The Redmi Note 8T motherboard is mounted on 12 different sized screws, and their location and length are critical — if you mix up the screws when you build them, you can damage the board or the body, and we recommend that you arrange them in order on a magnetic mat.

Step-by-step:

1. Unscrew all screws (use the PH00 screwdriver for most and the Y00 screws for the SIM tray).
2. Carefully unplug all the plumes: 📷 Main camera plume (black, wide) 🔊 Dynamics and microphone plume (thin, white) 📱 Display plume (the widest, with metal protection)

Put a plastic blade on the board, where there are no components.

If the board is not removed, check if all screws are unscrewed. A common mistake is to forget about the screw under the sticker or under the camera plume. It can also interfere with the glue under the battery - it must be carefully cut with a knife (no deeper than 1 mm!).

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If the screw doesn't unscrew, don't force it, you risk breaking the slits. Try dripping a little alcohol or WD-40 and waiting 5 minutes. Also check if the screw is twisted at an angle (this happens if the previous repair was done carelessly).

Disassembly of the camera module and speaker

The camera module in the Redmi Note 8T consists of three parts: the main camera (48 MP), wide-angle (8 MP) and depth sensor (2 MP). It is mounted on a metal frame that also captures the plume. When changing the camera, it is important not to confuse the assembly order - otherwise the focus will be disrupted.

To extract the camera:

1. Unscrew 4 PH00 screws (2 mm) holding the metal frame.
2. Carefully remove the frame without touching the lenses (greaty spots from the fingers will worsen the quality of the photo).
3. Disconnect the camera plume from the board (it is fixed by a latch - lift it up).
4. Put a plastic blade on the camera module, and it's sitting on double-sided tape.

The speaker and the microphone are at the bottom of the body, they're attached to the glue and two screws, and when you change the speaker, check the integrity of the mesh, and if it's broken, the dust will get in, which will distort the sound.

⚠️ Attention: If the camera takes blurry pictures after assembly, the likely reason is the wrong frame setting. It has to tightly press the module against the body, otherwise there will be a backlash, and autofocus will not work.

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When changing the camera, always check its performance before final assembly, connect the plume to the board, temporarily lock the camera and take a test photo. If something is wrong, it is easier to fix the error at this stage.

Smartphone Builder: How to Avoid Mistakes

Building the Redmi Note 8T after disassembly requires just as much care. The main rule is to check every step, for example, if you forget to plug in the display plume, you have to disassemble the device again.

Assembly order:

1. Make sure all the plumes are connected and fixed by latches.
2. Set the motherboard and spin the screws backwards.
3. Connect the battery and check if the smartphone is turned on (before the lid is installed).
4. Apply the new glue to the lid (use 3M 9448A double-sided tape or B-7000 liquid glue).
5. Press the lid evenly, starting from the center to avoid air bubbles.

After assembly, check:

• 🔋 Charging (plug the cable and make sure the current is going on).
• 📶 Network (insert) SIM-map and check the signal).
• 🔊 Sound (speaker and microphone).
• 📷 Camera (take a photo on the main and front cameras).

If something's not working, don't panic. 80 percent of the time, the problem is that the plumes are in bad contact. Take your smartphone apart and check all the plugs again.

Frequent problems after disassembly and how to fix them

Even with a careful disassembly, there can be problems, and here are the most common ways to solve them:

If the smartphone overheats after disassembling, chances are you forgot to apply the heat paste to the processor. In the Redmi Note 8T, it is under a metal shield on the board. Use the Arctic MX-4 thermopaste or similar.

Another common mistake is the wrong installation of antenna modules (they are located under the lid). If after assembly there is no network or Wi-Fi, check if the antenna wires have disconnected from the board.

FAQ: Answers to popular questions