Xiaomi Redmi 7A is one of the most popular budget smartphones of the brand, but even it is not immune to breakdowns. The screen does not respond to touch, the battery is swollen, or the speaker began to wheez? In most cases, repairs can be done on their own, saving on the service center. However, the dismantling of the Redmi 7A has its nuances: fragile plumes, adhesive display module and the risk of damage to flexible plates if you carelessly handle.
In this article, you will find a step-by-step photo instruction, a selection of video reviews from experienced craftsmen, a list of necessary tools and unique tips for disassembling this particular model (for example, how to separate the back cover without damaging the antenna tracks), we will also analyze typical beginner errors and give recommendations for diagnosing malfunctions before repairs begin.
If you've never taken a smartphone apart before, don't worry. The Redmi 7A is a medium-sized device (3 out of 5 on the iFixit scale), and even a beginner can do it right, and the key is to take your time and follow our recommendations.
Why should you take down the Xiaomi Redmi 7A?
Most Redmi 7A owners face the need to disassemble in the following cases:
- 🔋 Battery replacement is the most common reason: after 2-3 years of operation, the battery loses up to 30-40% of its capacity, and in some cases it begins to swell, which is dangerous for internal components.
- 📱 Display breakdown: cracks, broken pixels or a broken touchscreen.At Redmi 7A The screen is glued to the frame, so the replacement requires special care.
- 🔊 Failure of the speaker or microphone, often the problem is oxidation of contacts or damage to the plume.
- 📶 Antenna problems (network catches poorly, communication often breaks down) In this case, you may need to check the contacts on the motherboard.
- 💧 Even if the phone hasn't sunk, condensation or high humidity can cause corrosion on the board.
Before you start disassembling, make sure the problem does require physical intervention. For example, if the Redmi 7A does not turn on, first check:
- 🔌 Charger and cable (try charging from another unit).
- 🔄 Forced reboot (squeeze power) + Volume up for 10-15 seconds).
- 🔋 Battery condition (blowning is noticeable on the raised back cover or characteristic creak when pressed on the screen).
⚠️ Warning: If the phone was in water or other liquid, do not turn it on until completely disassembling and drying! Short circuit can disable the motherboard, and then repair will cost many times more expensive.
Required tools for disassembling Redmi 7A
For a careful disassembly of the Xiaomi Redmi 7A, you will need a minimal set of tools. Don’t skimp on quality – cheap plastic blades can break and scratch the body.
| Tool. | Appointment | Where to buy / price |
|---|---|---|
| Plastic spatula (mediator) | Department of the back cover and display module | AliExpress, 50–100 ₽ |
| Screwdriver cross (PH00) | Screws of the back cover and motherboard | Any tool store, 100-200 ₽ |
| Screen suction cup | Lifting the display module after heating | AliExpress, 80–150 ₽ |
| Fryer-dryer | Heating the glue under the screen (temperature 60–80°C) | Household stores, from 1,000 ₽ |
| Tweezers (preferably magnetic) | Retention of small screws and plumes | AliExpress, 150–300 ₽ |
In addition, the following may be useful:
- 🧴 Isopropyl alcohol (90%+) — oxidizing.
- 🧲 Magnetic mat - so as not to lose screws (in Redmi) 7A 12 pieces of different sizes!).
- 🔍 loope USB-microscope – to examine small details (for example, charging port contacts).
⚠️ Warning: Do not use metal blades to separate the screen! They can damage the plumes and antenna tracks.
Turn off the phone and remove it. SIM-map|Backup the data (in case of memory damage)|Prepare the workplace (clean desk, good lighting)|Put the tools in order of use|Take the process on video (useful for reverse assembly)-->
Next articleHow to disassemble Xiaomi Redmi 7A
The Redmi 7A is a multi-step process, and we're going to go from start to finish, taking into account the typical complexities of this model.
Step 1: Removing the back cover
The back cover of the Redmi 7A is mounted on latches and glue to remove it.
- Heat the edges of the cover with a hair dryer (60-70°C) for 1-2 minutes. This will soften the glue.
- Insert a plastic blade into the gap between the lid and the frame (start at the bottom corner where the speaker and Type-C connector are located).
- Carefully drive the shoulder blade along the perimeter, snapping the latches. Don't put too much effort into it, the lid may crack!
After removing the cover, you will see:
- 🔋 Battery (stick to the body).
- 📟 Motherboard with Qualcomm Snapdragon 439 processor.
- 📶 Antenna modules (do not touch them with metal objects!).
What to do if the lid does not lend itself?
Step 2: Shutting off the battery
Before any work with internal components, be sure to turn off the battery!
- Unplug the protective film from the battery (it is glued weakly, tuck the corner with tweezers).
- Disconnect the battery plume from the motherboard with a plastic blade.
Important: In the Redmi 7A, the battery is glued to the body with double-sided tape to remove it:
- Put a plastic shoulder blade on the side (don’t bend it!).
- If the tape doesn't lend itself, gently pull the tongue (if any) or use isopropyl alcohol to dissolve the glue.
💡
If the battery is swelling, don't prick it! Take the phone outside or into a well-ventilated room and carefully remove the battery, avoiding sudden movements. Bloated batteries can ignite if damaged.
Step 3: Withdrawal of the motherboard
The Redmi 7A motherboard is mounted on 8 screws (of different lengths!) to remove it:
- Unscrew all the screws (remember or take a picture of their location!).
- Carefully unplug all the plumes: 📞 Display plume (the widest, at the top of the board). 🔊 Dynamics and microphone plume (bottom, next to Type-C). 📶 Antenna connectors (small gold connectors).
Tie the board with a plastic spatula and gently lift it.
Pay attention to the metal frame under the board – it is attached separately and easily lost during assembly!
Step 4: Disassembly of the display module
The Redmi 7A screen consists of three parts: a touchscreen, a display panel and a frame.
- Heat the display with a dryer (70-80°C) for 3-5 minutes. The glue under the screen is very strong!
- Stick the suction cup to the bottom of the screen (where the Home button is located) and gently pull up.
- Insert a plastic blade into the resulting gap and slowly lead it along the edges, separating the glue.
For a deep diagnosis of the board, a multimeter (voltage check at key points) or USB-microscope (inspection for microcracks).
Reverse Assembly Tips for Redmi 7A
Building a phone is often harder than disassembling. Here are the key points for the Redmi 7A:
- Plugs: Lastly, when the board is already secured by the screws, you can prevent accidental pulling.
- Screen glue: Use the B-7000 or 3M double-sided Scotch. Apply a thin layer, otherwise the excess will squeeze out and hit the board.
- Screw them cross-curl (like the wheels of a car) to avoid skewing the board.
- Rear cover: Before you stick it and the body clean of old glue with alcohol. Press the cover evenly, starting from the center.
After assembly, be sure to check:
- 🔋 Charging (plug the charger and make sure the current is going on).
- 📶 Network signal (if not, check the antenna connectors).
- 🔊 Sound and microphone (record voice message).
- 📷 Cameras (take a photo on the main and front).
⚠️ Note: If after the assembly of Redmi 7A It doesn't turn on, don't panic. Possible causes: Unconnected battery or display plume, forgotten screw under the board (can close contacts), damaged flexible cable (check for tears), disassemble the phone again and inspect all connections.
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The most common mistake when building Redmi 7A is forgetting to plug the power button plume! If the phone doesn't respond to a press, check this point first.