Modern smartphones like the Xiaomi Redmi 8 are designed with a tightness and aesthetic appearance that often makes it difficult to access internal components. Owners face the need to open the device when replacing a broken display, battery or motherboard. The process requires accuracy, since the rear panel is glued around the perimeter, rather than fixed screws.
The wrong actions can lead to damage to plumes, cracks in glass or impaired moisture protection. Before starting work, you need to prepare a quality tool and workplace. In this article, we will discuss in detail each stage of dismantling so that you can safely perform repairs at home.
It is important to understand that self-interference with the design of the gadget will void the official warranty. If your device is still subject to warranty service, it is better to contact an authorized service center. However, if the failure occurred after the warranty expires or you are confident in your abilities, follow our instructions.
Tools and workplace preparation required
Good preparation is key to successful disassembly. You need a toolkit that allows you to carefully separate the lid without damaging the frame and internal elements. Use of improvised tools such as knives or needles is highly undesirable due to the high risk of short circuit or mechanical damage.
First of all, get a hair dryer or a professional heating pad for even heating of the glue, you also need a mediator or a thin plastic card to crack the latches, you will need a set of screwdrivers with interchangeable bits, including cross and special shapes.
- 🔧 Precision screwdriver set (PH000, Phillips).
- 🔥 Hair dryer or heating pad.
- 💳 Plastic mediator or card.
- 🧲 Magnetic screw mat.
- 🧴 Isopropyl alcohol or liquid B-7000.
The work surface should be clean, well-lit and not conduct electrical current. It is recommended to use an antistatic mat to prevent damage to electronics by static discharge. All small parts are better folded in separate containers or on a magnetic mat.
Safety measures and initial diagnosis
Before you start physically affecting the body, make sure the device is completely turned off. Working with the phone on can lead to a short circuit, especially if you touch the plumes of the display or battery with a metal tool.
If there are cracks on the screen, it is recommended to pre-paint transparent tape throughout the matrix area, which will prevent the glass fragments from raging and hold them together, reducing the risk of cuts and further destruction of the display when heated.
⚠️ Note: Before starting work, be sure to discharge the battery before 15-20%. A fully charged battery can catch fire if damaged, and a deep discharge is lower. 0% Dangerous to Li-Ion chemistry.
Check if the battery is swelling through cracks in the back cover. If the battery is swelling, it is strictly forbidden to heat the device with a hairdryer, as this can lead to ignition of the electrolyte, in such cases, special care is required when removing the battery.
The process of heating and separation of the back cover
The main fixing element of the Redmi 8 back panel is a special glue that softens at a temperature of about 80-90 degrees Celsius. Uniform heating of the device perimeter is a critical step on which the integrity of the glass depends.
Use a hair dryer to direct hot air along all four faces of the smartphone. Do not hold the jet of air at one point for longer than 3-5 seconds, so as not to overheat the display or internal components. The entire heating process takes about 2-3 minutes.
How to check the sufficiency of heating?
After heating, insert a plastic mediator or a thin card into the corner between the frame and the lid. Carefully guide the tool along the perimeter, gradually snapping the plastic latches. Movements should be sliding, without sharp jerks.
- 🌡️ Heat the perimeter evenly during the 2-3 minute.
- 🔪 Insert the mediator at an angle of 45 degrees to the body.
- 🔄 Move around in a circle, releasing the glue gradually.
- 🚫 Do not use metal blades to open.
If the lid resists, don't use force. Repeat the heating procedure. The rush at this stage often leads to cracks in the back panel, the replacement of which is harder to find than the display.
Disabling the plumes and removing the protective plate
Once the lid is successfully removed, you will have access to the insides, but you cannot remove the battery or other modules immediately, and at the bottom of the device there is a metal protective plate covering the plumes.
You have to unscrew all the screws that hold this plate, and they're usually around. 10-12 And it's very important to remember or photograph the location of each screw, so that you don't damage the board when you build it.
☑️ Dismantling protection
Once the metal shield is removed, the connectors will be accessed, and the first thing you need to do is turn off the battery plume, and use a plastic blade or finger to do that, gently lifting the connector up.
Only when the device is de-energized can the display and touchscreen plumes be disconnected, and these components are very fragile, so you can't pull them on the cable itself -- just hold on to the rigid plastic connector.
⚠️ Note: Trains in Xiaomi Redmi 8 can be fixed with additional plugs. remove them carefully, putting your nail or plastic tool.
Comparison of autopsy methods and risks
There are several approaches to lid removal, each with its own advantages and disadvantages, depending on the tools and experience of the master.
| Method | Tools | Risk of damage | Implementation time |
|---|---|---|---|
| Heating with a hair dryer | Fen, mediator | Low. | 10-15 minutes |
| Chemical solvent | Alcohol, needle | Medium (screen) | 20-30 minutes |
| String (string) | Leska, heat. | Tall (trains) | 15-20 minutes |
Using a thread or string effectively cuts the glue, but it creates a danger of cutting the plumes running around the perimeter below the frame. Chemical solvents can leak under the display and damage the matrix or glue that holds the touchscreen.
The safest and most recommended method is a combination of moderate heating and mechanical mediator snapping, which minimizes risks and does not require expensive equipment.
Common mistakes in the dismantling of the Redmi 8
Beginners often make mistakes that lead to additional repair costs, and one of the most common is trying to plug the lid off the end where the volume and power buttons are located, and there are plumes that pass, and damage to them is almost guaranteed.
Another mistake is to use too aggressive force in snapping: plastic latches inside the housing are fragile and easily break, which will lead to backlash and creaking of the body after assembly.
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Use a suction cup to create an initial gap. When you heat up, pull the suction cup up slightly, creating tension, and at this point insert the mediator into the resulting gap.
Don't forget the screws are of different lengths. If you screw a long screw into a hole for a short one, you can punch a board or get stuck in the components, which will break the motherboard when you tighten it.
⚠️ Warning: When installing a new cover, be sure to remove the remnants of the old glue.The surface must be defatted with alcohol to securely fix the new adhesive layer.
Assembling and checking functionality
After the necessary repairs (replacing the battery, screen or cleaning the speakers) are done, the assembly stage begins, and the actions are performed in reverse order: connecting the plumes, installing a protective plate, twisting the screws.
Before the final adhesion of the cover, it is recommended to temporarily connect the battery and turn on the device, which will check the performance of the touchscreen, sound in the speaker, camera operation and vibration.
If everything is working correctly, apply a new layer of glue (B-7000 or special tape) around the perimeter of the frame. Press the lid and lock the device with rubber bands for 15-20 minutes before the initial grasp of the glue.
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Checking all modules before final assembly saves time and eliminates re-disassembly in case of defect detection.