Smartphone Xiaomi Mi 8, released in 2018, became a landmark device for the company thanks to the introduction of the new model. AMOLED-But despite the strong aluminum frame, the back panel of glass remains vulnerable to falling. Damage to the back glass is not only an aesthetic problem, but also the risk of losing the tightness of the case, which can lead to dust getting inside the device.
Many users are wondering if you can replace a broken lid without going to the service center. The replacement procedure is quite real at home, if you act carefully and observe the temperature regime, the main thing is to properly warm the adhesive layer so as not to damage the battery or other internal components located directly under the glass panel.
In this article, we will take a closer look at the process of removing an old lid, cleaning the frame of glue residues, and installing a new part. You will learn what tools will be required to work, how to avoid common errors, and what to pay special attention to when building. The accuracy of actions at each stage ensures that your smartphone will look like new.
Tools and workplace preparation required
Before starting to disassemble the Xiaomi Mi 8, special equipment must be prepared. The lack of suitable tools can lead to damage to the body or injuries. The main tool for heating is the thermophene or, in extreme cases, a household heating pad, although professional equipment gives a more controlled result.
To work with the adhesive layer and small screws, you will need suction cups, thin plastic mediators (scapula) and a set of precision screwdrivers. Pay special attention to the cleanliness of the desktop: cover it with soft cloth or silicone mat to avoid scratches on the screen and loss of small screws.
Below is a list of what should be on your desk before you start:
- 🔥 Thermophen or heating platform for softening glue.
- 🔧 Set of screwdrivers (cross Pentalobe and Phillips) for screws of the body.
- 📱 Plastic blades and mediators for safe opening of seams.
- 🧴 Special glue B-7000 or T-7000 lock-in.
⚠️ Note: Using a metal blade instead of a plastic blade can short-circuit the battery or damage the plumes if the tool slips inside the housing.
It's also important to have good lighting, and the small parts and plume connectors are not easily visible in dim light, which increases the risk of error, and if you have a magnifier or macro on your phone, use them to monitor the internal connections.
Removing the old back cover and cleaning the frame
The process of removing the broken lid begins with heating the perimeter of the case. The adhesive composition used by Xiaomi melts at about 80-90 degrees Celsius. Warm up the edges of the smartphone evenly for 2-3 minutes, constantly moving the heat source so as not to overheat one point.
After warming up, gently insert the suction cup into the bottom of the back panel and pull up, creating a small gap. Insert a thin plastic mediator into the resulting gap. Move the tool along the perimeter, trying not to plunge deeper than 3-4 mm so as not to touch the internal components.
Once the glass is successfully separated, you will have access to the insides, and you will need to clean the aluminum frame of the residue of the old glue, a time-consuming process that requires patience.
- 🧹 Carefully scrape off large pieces of glue with a plastic spatula.
- 🧪 Use isopropyl alcohol to soften the sticky layer.
- 🧽 Wipe the surface with a lilaless napkin until perfect smoothness.
Pay special attention to the area around the camera module and the fingerprint scanner. If these elements remain glue, the new cover can get crooked or damage the optical module. Complete absence of pile and dust on the frame is critical for quality sealing.
☑️ Check before installing a new cover
Installation of a new back panel and fixation
Once the frame is completely cleaned, you can start mounting a new part. Before applying the glue, make sure to try on a new lid to the case and make sure that all the holes match and the gaps around the perimeter are uniform, which will help avoid distortion.
Apply a thin layer of special adhesive (e.g., B-7000) around the frame. Try not to apply the adhesive too close to the internal components so that it does not squeeze in when pressed. Let the glue dry a little (about 1-2 minutes) so that it becomes less fluid.
Carefully align the lid with the body, starting at the top where the camera is located. Press the panel tightly around the perimeter. You can use stationery bands to evenly distribute the pressure, wrapping them around the smartphone in several places.
| Work segment | Implementation time | Required temperature | Criticism |
|---|---|---|---|
| Heating the hull | 2-3 minutes | 80-90°C | Tall. |
| Cleaning the frame | 10-15 minutes. | Room room | Medium |
| Applying glue | 2-3 minutes | Room room | Tall. |
| Elastic fixation | 1-2 hours | Room room | Tall. |
Leave your smartphone to dry at least 2-3 Full polymerization of the glue provides the necessary strength and protection from moisture. SIM-map.
Working with a fingerprint scanner
Xiaomi Mi 8 has a fingerprint scanner built directly into the back cover. When changing the panel, the question often arises: do you need to move the old module or a new cover is assembled. In most cases, new covers are sold without electronics.
If you just bought glass, you're going to have to gently dismantle the scanner from an old, broken lid, and it's mounted on double-sided tape, and you're going to put a thin blade on the module, and you're going to move it to a new location, making sure that the contact area matches the connector on the motherboard.
When installing the module, it is important not to damage the thin plume. The plume hall can cause the scanner to stop responding to touch. After installation, check the sensor before the final sealing of the case.