How to disassemble Xiaomi Redmi Note 4: a complete guide to dismantling

Xiaomi Redmi Note 4, released in 2016, is still a popular device due to its robust metal body and excellent autonomy. However, time takes its toll: broken screens, worn-out batteries or departed plumes require hardware intervention. Disassembly of this device requires care, since the design involves the use of a large number of screws and tight fitting components.

Before you get to work, you need to understand that opening the case automatically deprives you of an official warranty if it is still valid.The process requires a specialized tool, without which there is a high risk of damaging plastic latches or breaking fragile plumes. In this article, we will discuss in detail the algorithm of actions that will help you safely disassemble the Xiaomi Redmi Note 4 to replace the display or battery.

It's important to note that inside the device are components that are sensitive to static electricity and mechanical stress. Don't rush to use force if the part fails - you're likely to have missed some fastener. The right sequence of actions will preserve the integrity of the motherboard and other expensive components.

Preparation of the workplace and the necessary tool

And quality repair starts with the right organization of space, and you'll need a clean, well-lit surface, preferably an antistatic mat, to prevent static damage to the electronics, and to avoid the absence of small foreign objects, you'll need to keep tiny screws in the process.

To successfully disassemble the Redmi Note 4, you will need a standard suite of mobile device repair tools. Using inappropriate items such as kitchen knives or thick screwdrivers can result in scratches on the frame or the rims breaking.

Here is a list of what to do before starting the procedure:

• 🔧 A set of precision screwdrivers (including cross-haired) P2 flat)
• 🎴 Plastic blades (mediators) for opening the body
• 🌡️ Hair dryer or heat heater for softening glue
• 🧲 Magnetic mat or screw sorting container

⚠️ Warning: Before starting any work, be sure to turn off the device. Attempting to disassemble the included smartphone can lead to short circuit and irreversible damage to the motherboard.

Pay special attention to the battery condition. If you plan to work with components underneath it, or if you accidentally damage the plume, the lithium polymer battery may catch fire. Be very careful.

Dismantling the tray SIM-maps and back cover removal

The first step in the process of disassembly is to remove the tray for SIM-This action removes the internal stress in the structure and allows you to access the hidden screws, and ignoring this step can lead to the failure of the case when you try to remove the lid.

Use a special clip or thin needle to press the extraction mechanism located on the lower end of the device next to the USB-Once you've removed the tray, flip your smartphone over and look at the bottom of the back, and that's where, under the back, or directly in the speaker hole, the fasteners often hide.

The process of removing the back cover requires patience, as it is held on a two-phase glue and plastic latches around the perimeter:

• 🔥 Carefully warm the perimeter of the back cover with a hair dryer to temperature 40-50 degrees to soften the glue layer.
• 🔪 Insert a plastic blade into the gap between the frame and the cover in the area of the lower part of the body.
• 🔄 Slowly lead the shoulder blade along the side faces, snapping the locks, trying not to damage the plume of the fingerprint scanner.

Don't try to open the top cover first, because there's a plume that's easy to break when you're moving abruptly.

⚠️ Warning: Do not use metal tools to lid the metal may damage the graphite layer or breach the battery if it swells.

Unscrewing screws and removing protective plates

After successfully removing the back cover, you will see the inside of the smartphone, and you will see a lot of screws that fix the plastic frame and protective screens. The Redmi Note 4 uses 14 screws that you need to unscrew before you disassemble.

It's important to follow the order of twisting and folding screws, because they can differ in length and diameter, if you confuse them when you build them, you can damage the thread or break through the body. Systematization of the fastener is the key to successful assembly.

At the bottom of the device, under the plastic speaker cover, there may also be additional screws hidden, and once removed, the plastic protective plates that cover the display plumes and main connectors must be carefully removed, which are usually fixed to the latches and require careful handling.

When you remove the protection, you get access to the main plumes, and you can see the structure of the display and touchscreen connection to the motherboard, and beware, some models may have additional metal screens that cover the connectors.

Disabling the plumes and retrieving the battery

The most critical part of the disassembly is the shutdown of the plumes. Power can still come if you don't disconnect the battery first. In the Xiaomi Redmi Note 4, the battery connector is located at the bottom of the motherboard, next to the vibrator.

Use a plastic shoulder blade or finger (access-free) to snap the connector, move upwards, not sideways, so as not to break the contacts, and after the battery is turned off, you can safely work with the rest of the components.

Next, you need to disconnect the main plumes:

• 📱 Display plume (centered, wide and flat)
• 🖐️ Touchscreen plume (often paired with the display or separately)
• 📡 Antenna cable (thin coaxial wire going to the top)

Antenna cable requires special care: it must first be carefully removed from the slots, and then disconnect the connector. You can not pull behind the wire - only by the metal tip.

⚠️ Warning: Never turn off the plumes under tension. If the connector does not come out, check if it is clamped with a metal plate or a protective shield.

The battery in this model is glued to the body with double-sided tape, and to remove it, it is recommended to warm up the back of the case again a little bit or use a special liquid to dissolve the glue. It is strictly forbidden to smack the battery with sharp objects.

Replacement of the display and removal of the motherboard

If you wanted to replace a broken screen, you need to remove the old matrix after the plumes are turned off. In Redmi Note 4, the display can be glued to a frame or assembled with a frame. In the first case, you need to warm up and cut the glue, in the second, you just need to move the components to a new frame.

To remove the motherboard, you need to unscrew the screws that hold it in the landing place, usually about 4-6 pieces. Also remember to disconnect the main and front camera plume, as well as the control button plume, if it is not integrated into the common tourniquet.

Table of the main modules and their location:

When installing a new motherboard, make sure that all screw holes match. Don't put too much effort into screwing - the plastic of the case cracks easily.

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Move the speaker and vibrator from the old display to the new one only if there are no new ones in the kit. Old components may be worn out, but this will save time on soldering contacts.

Assembly of the device and verification of functionality

The battery is assembled in the exact reverse order, first it is installed and glued to the battery, then the battery plume is connected, and only after the battery is connected can the motherboard be installed and the rest of the components are fixed.

Check all functions before you finally twist all screws and stick the back cover.

• ✅ Smartphone responds to charging
• ✅ Image on the screen without defects
• ✅ The touchscreen works all over the area.
• ✅ Cameras and sound function

If all tests are successful, you can apply a new glue (B-7000 or analog) to the perimeter of the case and install the back cover. For better fixation, it is recommended to put the smartphone under the press (or pressed with heavy books) for 15-20 minutes.

Don't turn the device on immediately after assembly, if you've used a lot of glue, let it grab. The quality of gluing affects the moisture resistance and durability of the repair.

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The main principle of assembly is not to twist the screws "to the point" at once. First, make all the screws, and then evenly tighten them diagonally to avoid skewing the body.

Frequently Asked Questions (FAQ)