Smartphone Xiaomi Redmi Note 7 is deservedly considered one of the most popular budget devices on the market, but its popularity has a downside: the fragile glass back cover often breaks when dropped. Owners are faced with the need for repairs that cannot be performed without access to the internal components of the device. Disassembling this model requires some skill, since the structure is attached to a durable adhesive layer, and the internal elements are located very compactly.
Many users mistakenly believe that it is enough to pry the cover with a screwdriver to gain access to the battery or motherboard. In fact, careless intervention can lead to damage to the cables, display, or even irreversible damage to the case. Correct sequence of actions and the use of specialized tools is the key to successful repairs without unnecessary costs for replacing additional parts.
In this article we will look in detail at the process of removing the back cover, removing the battery and replacing the display module. We will pay attention to the key stages where errors most often occur, and tell you how to minimize the risks of damage to electronics. If you are planning a DIY repair, carefully read each step of the instructions before starting work.
Preparing tools and work area
Before you begin physical impact on the body Redmi Note 7, it is necessary to organize a safe workspace and prepare a set of tools. Lack of suitable equipment is the main reason why DIYers break screws or damage cables. You will need a plastic spudger to open the case, as a metal tool can short out the contacts or leave deep scratches on the glass.
You will need a hair dryer to heat the adhesive layer that holds the back panel in place. It is better to use a construction hair dryer with temperature control, but in extreme cases a powerful household hair dryer will do. It is important not to overheat the device so as not to damage the display matrix or batteries, as they are sensitive to high temperatures. You will also need screwdrivers: Phillips PH00 for screws and flat for neat prying of parts.
Don't forget to prepare a container for sorting small screws and a magnetic mat. The loss of even one screw may result in the case not fitting tightly after assembly, which will compromise its moisture resistance and aesthetic appearance. Additionally, prepare isopropyl alcohol to remove any remaining old glue and new adhesive strips to secure the lid.
- 🛠️ Plastic picks and paddles for opening the case
- 🔥 Hairdryer (construction or powerful household) for heating
- 🔩 Precision screwdriver set (including
PH00) - ⚡ Isopropyl alcohol and cotton swabs for cleaning
- 🧲 Magnetic mat or container for screws
⚠️ Attention: Do not use a regular household hair dryer at maximum power without control, as local overheating can melt the cables inside the case or cause deformation of the plastic elements of the frame.
Organizing your workspace also includes ensuring good lighting. You need to see the smallest details, including delicate trains that may not be visible in dim light. If you are planning to replace the battery, make sure you have a safe place to dispose of the old battery, as damage to the lithium battery may cause a fire.
The process of removing the rear glass cover
The first and most important step is heating the adhesive layer around the perimeter of the back cover. You need to heat the glass evenly for 3-5 minutes to soften the glue. Start heating from the bottom edge of the device, where the main battery is usually located, and gradually move towards the top and sides. The surface temperature should not exceed 70-80 degrees Celsius.
After heating, carefully insert the plastic pick into the gap between the frame and the glass. Do this slowly, moving the spatula along the perimeter to cut through the layer of glue. Do not use excessive force as the glass may crack from pinpoint pressure. If you feel a lot of resistance, it means that the glue has not yet warmed up enough and you need to continue heating.
Pay special attention to the corners of the device, where the glue is often applied in a thicker layer. IN Xiaomi Redmi Note 7 There are also sensors and cameras that can be damaged if the paddle goes too deep. Accuracy and patience Speed is more important here. Once you go all the way around, the lid should separate from the body.
- 🌡️ Heat the glass evenly, moving around the perimeter
- 🔪 Use only plastic tools for separating
- 👀 Monitor the depth of penetration of the mediator into the body
- ⏳ Take your time, give the glue enough time to soften
After removing the cover, be extremely careful with the antenna cable that often runs underneath it. This cable connects the top and bottom of the device, providing cellular and Wi-Fi functionality. If it is torn or pinched, you will have to replace not only the cover, but also carry out complex repairs to the board.
- Battery replacement
- Replacing the display
- Cleaning from dust
- Just out of curiosity
Removing the battery and turning off the power
Once you have access to the internals, the first step is to disconnect the battery from the motherboard. This is a critical step that prevents short circuits during further disassembly. Remove the metal protective cover covering the connectors by unscrewing the four screws. Be careful not to lose these small fasteners.
Under the protective cover you will see the battery connector. Carefully remove the cable with your fingers or a plastic spatula, prying it off by the edge. Never pull on the cable itself, as it may come off the board. Once the power is turned off, you can safely continue working on other components without fear of accidental shorting.
The battery itself Redmi Note 7 attached to an adhesive base, which holds it very firmly. To remove it, you can use special plastic wedges or heat its surface with a hairdryer. Be careful not to puncture or bend the battery case, as this may cause a chemical reaction and fire. If the battery is swollen, you need to work with it especially carefully.
☑️ Safe battery removal
In some cases, the adhesive may be so strong that it is almost impossible to remove the battery without damage. In such a situation, it is better to use patience and gradually soften the glue with isopropyl alcohol, pouring it into the gap between the battery and the case. This will allow you to safely separate the battery while maintaining the integrity of the inner surface of the case.
⚠️ Attention: If the battery is deformed or shows signs of swelling, it is strictly prohibited to use metal tools to remove it. The risk of breaking through the battery case and fire in this case is extremely high.
Before completely removing the battery, take a photo of the location of all cables and screws - this will help you reassemble the device correctly and remember to connect important connectors.
Replacing the display module and touch glass
If your goal is to replace the display, the process will be different from removing the back cover. Display in Redmi Note 7 glued to the front frame and also requires heat to remove. However, here you need to be even more careful, since the matrix is very sensitive to mechanical stress and overheating. Heat only the edges of the display, avoiding the center where the matrix itself is located.
After heating, carefully pry the display with a plastic spatula and slowly separate it from the body. Pay attention to the cables that connect the display and touchscreen to the motherboard. They pass through narrow channels and can break with sudden movement. They need to be disconnected only after the display is completely free from the adhesive layer.
To replace only the glass (if the matrix is intact, but the glass is broken), you will need specialized equipment, such as a machine for separating glass and matrix with heat and vacuum. Doing this at home is extremely difficult and risky. Most often, if the glass is damaged, the entire display module assembly is replaced, which guarantees stable operation and the absence of artifacts on the screen.
- 📱 Heat only the edges of the display, bypassing the center of the matrix
- 🔌 Disconnect the cables only after completely dismantling the glass
- 🛡️ Use protective film when working with a fragile matrix
- 🔄 When replacing glass, consider the complexity of the process and the risk of damage