The need to disassemble the case of the smartphone can arise suddenly: the battery is swollen, the screen is broken or you need a deep cleaning of the speaker from dust. Owners of popular models often look for an answer to the question of how to open the Xiaomi Redmi 4 to repair yourself and save on the services of the service center. This process requires accuracy, since the device is assembled tightly enough, and the internal components are compact.
Xiaomi Redmi 4 (often called Prime or Standard) has a metal body, which creates certain difficulties in dismantling. Unlike plastic counterparts, you can not just plug the back cover. The technical process requires heating the adhesive layer and the use of special tools. Wrong actions can lead to damage to the plumes or impaired sealing of the structure.
In this guide, we will take a detailed look at the steps to open the device, the necessary tools and precautions. You will learn how to safely disconnect the display module and access the motherboard.
Preparation of the workplace and tools
Before you start disassembling your smartphone, you need to have a comfortable workspace, the lights should be bright and directed so that the small parts and screws are clearly visible. Loss of fasteners is a common problem when you are in a hurry, so prepare a magnetic mat or containers for sorting screws of different sizes.
To work with the Xiaomi Redmi 4, you will need a specific set of tools. A conventional screwdriver will not be enough, since the design uses screws with Torx heads.
- 🛠️ Set of screwdrivers (cross and Torx) T5/T6) hull-screw.
- 🌡️ Hair dryer building or household heating pad for heating the adhesive layer of the screen.
- 🎴 Plastic mediators or suction cup for neat disengagement of the display.
- 🔧 Tweezers with dielectric coating for working with small plumes.
Pay special attention to clean hands and tools. Fat spots can remain on the inside of the display or contacts, which will subsequently lead to image problems. Static electricity is also dangerous to electronics, so it is recommended to use an antistatic bracelet or periodically touch a grounded metal object.
⚠️ Warning: Before any work begins, be sure to turn off the device. Attempting to disconnect the plumes under voltage can lead to a short circuit and failure of the power controller.
The process of dismantling the back panel and battery
Unlike many modern smartphones, the Redmi 4 doesn’t have a removable back cover in the classic sense, if you consider the all-metal version (Prime), however, if you have a version with plastic inserts or plan to disassemble the entire process begins with the removal of the screws. In some modifications, it is necessary to first remove the tray. SIM-map.
The heating is critical. The glue that holds the display to the frame is very strong. You need to warm the perimeter of the screen evenly with a hairdryer for 2-3 minutes. The temperature should not be extreme so as not to damage the matrix or the plastic frame. It is enough to feel when the body becomes hot, but tolerant to touch.
Once you warm up, use a suction cup to create a small gap between the screen and the frame. Insert a plastic mediator into the gap. Move it along the perimeter, gradually peeling off the display. Don't rush or exert excessive effort to prevent the glass from cracking.
⚠️ Warning: Do not insert metal tools (knife, needle) deep between the screen and the body.There is a high risk of damage to the plume of the backlight or touch screen, passing in close proximity to the edges.
☑️ Checking before disassembly
Disabling the plumes and removing the display module
Once the Xiaomi Redmi 4 display module is peeled off around the perimeter, don't try to remove it completely right away. It's connected to the motherboard with plumes. Carefully bend the screen like a page of a book to access the internal components. Your goal is to find the connectors and safely disconnect them.
On the motherboard, connectors are usually covered by a metal shield plate, which is mounted with several screws, and you use a thin screwdriver to unscrew them, and you put the plate aside, and underneath it you'll see the display connectors and the touchscreen.
To turn off the plumes, use a plastic blade or nail. Push the connector from the bottom up, trying not to damage the contacts themselves. Once all the cables are disconnected, the display module can be completely separated from the phone body.
- 🔌 Carefully disconnect the main display plume (usually wide).
- 📱 Turn off the touchscreen plume (often nearby).
- 🔋 Disconnect the battery connector from the motherboard before any other manipulations.
Now that the screen is off, you have access to the main board, the speakers, and the battery, which is a condition that you need to replace the battery or repair the charging connectors, and if that's what you were going to do, most of the work is done.
What to do if the plume is broken?
Access to motherboard and internal components
To gain full access to the insides of the Xiaomi Redmi 4, you need to dismantle the metal chassis frame to which the motherboard is attached, which is held by many screws around the perimeter and in the center.
Once you've unscrewed all the screws, carefully remove the metal frame, underneath it is the board itself, the vibrator, the main speaker and the antenna modules, and at this point you can see the entire architecture of the device, and often there are antenna cables under the board that also need to be disconnected if you want to fully remove the board.
When working with the motherboard, it is important to be careful. The chips are sensitive to mechanical pressure. If you need to replace the charging connector (a common problem of this model), the board can not be removed completely, but only slightly raised, gaining access to the bottom.
| Component | Location. | Difficulty replacing |
|---|---|---|
| Battery | Under a metal frame | Medium (requires heating) |
| Charging connector | The bottom of the fee | High (needs ration) |
| Vibromotor | Down speaker. | Low. |
| Main camera. | Top of the pay | Low. |
Battery replacement is one of the most sought-after procedures. The battery in Redmi 4 is glued to the body with double-sided tape. Removal of it may also require light heating of the back of the case and the use of a plastic card to tamper with the battery.
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When installing a new battery, don’t glue it to the ground right away. First, check the phone’s performance by plugging in a plume to make sure the new battery is working properly.
Assembly of the device and verification of functionality
The assembly is done in reverse order, but it requires even more care. Set the motherboard in place, make sure all screw holes match. Twisted the screws of the board mounting, but don't tighten them to the full stop for adjustments.
Connect all the display and touchscreen plumes, put a metal plate on the connectors, and that's the important thing: the plate not only protects, but also fixes the plumes, preventing them from moving away when they vibrate.
Before you finally seal the case and twist all the screws, it's recommended that you start the first one. Connect the battery and press the power button. If the phone vibrates and the image appears, you're on the right track. If the screen is black, double-check the plumes.
- ✅ Check the touchscreen (fly through the menu).
- ✅ Make sure the speakers and microphone work.
If all functions work correctly, you can apply a new glue (B-7000 or special adhesive tapes) and press the screen against the case. For better adhesion, it is recommended to put the phone under a small load for 1-2 hours.
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Quality assembly depends on the cleanliness of the surfaces. Be sure to remove the residue of old glue from the frame and display before applying a new layer, otherwise the leakage will be impaired.
Typical errors and precautions
The most common mistake when trying to open the Xiaomi Redmi 4 is neglecting heating. Trying to pull the screen "cold" in 90% of cases leads to cracks in the glass or damage to the frame, the glue in these devices is very aggressive and requires softening.
Another mistake is the loss of screws. The screws can be as long as half a millimeter, but they'll screw in, but if you screw a long screw into a short hole, you can punch through the body or damage the board inside.
Using inappropriate tools, such as regular kitchen knives or thick screwdrivers, often results in chipped on the sides of the case.The Redmi 4 metal is soft, and leaving the serrated on it is very easy.Use a specialized tool.
⚠️ Warning: If you notice a bloating battery during the disassembly process, stop working immediately.Puncture or severe deformation of the ballooned battery can cause ignition.Replace the battery first.
Remember, self-disassembly deprives the device of warranty if it was still in operation. However, for the Redmi 4, which is already a mature device, this is often the only economically viable way to repair.