The Xiaomi Redmi Note 7 remains one of the most popular self-repair models, thanks to the availability of spare parts and relatively simple design. However, removing the display module on this smartphone harbors several pitfalls: a fragile plume of the touchscreen, duct tape under the battery and the risk of damage to flexible connectors. In this article, we will analyze three officially approved methods of dismantling (heated, without it, and to replace only glass), and also explain how to avoid the typical mistakes that cause 70% of beginners to break the phone in the first stage.
It is important to understand: Redmi Note 7 (codename lavender) has a glued display module where the touchscreen is, OLED-The matrix and the glass are a single unit, which means that if you break the glass, you have to change the entire module -- you can change the glass separately, but you need professional equipment and skills.
Before you start, answer three questions:
- Do you have the right tools (plastic blades, suction cup, temperature-adjusted hair dryer)?
- Are you ready for the fact that after opening, you may need to glue the battery (glue loses its properties)?
- Are you sure that the problem is in the display, and not in the plume or motherboard?
If you answer at least one question with no, you better go to the service center, otherwise read on.
Required tools and materials
To dismantle the Redmi Note 7 display, you'll need a minimal set of tools, but you don't need to save on quality -- cheap plastic blades break and scratch the body. Here's the full list:
- 🔥 Technical dryer with temperature control (optimally 70-90)°C) Household hair dryer is not suitable - it is too powerful and can melt plastic.
- 🧲 Suction cup with a diameter of 5-7 cm with a metal ring (for convenient grip).
- 🔧 A set of plastic blades (preferably with pointed ends for smearing plumes).
- ⚡ Tweezers with curved ends (for working with small connectors).
- 🔋 Isopropyl alcohol 90%+ (cleaner).
- 📦 New glue (bilateral scotch or liquid glue) B-7000 reverse-assembly).
- 🔌 Screwdriver. T3 (to remove the stains of the motherboard, if necessary).
Critically, use only isopropyl alcohol, not acetone or solvent, which destroys the protective coating of plumes and can lead to corrosion of contacts. Also prepare an antistatic mat or at least work on a wooden surface - static electricity can damage the motherboard.
If you're planning a full replacement of the display module, order the original part in advance.For the Redmi Note 7 Suitable modules with marking: DM-RN7-01 (original DM-RN7-02 (improved version with oleophobic coating. 2026 year-on 3 500 before 5 000 RUB depending on the supplier.
⚠️ Note: Do not buy display modules without prior inspection IMEI! Fakes often have incompatible touchscreen firmware, which is why the sensor works with delays or does not recognize the multi-touch.
Preparing the phone for disassembly
Before you take the display off, you have to completely de-energize the device and prepare it for opening.
- Turn off the phone and remove it. SIM-card from the tray (use a paper clip or a special key).
- Discharge the battery to 25-30%, and a fully charged battery can ignite if damaged.
- Remove the back cover (if it has already been peeled off) or prepare a hair dryer to remove it.
- Unplug the protective film from the battery (if any) – this will simplify access to the plumes.
If the back cover hasn't been removed yet, you'll have to unplug it.
- Heat the hair dryer of the edge of the cover (temperature 70)°C, hold for 20-30 seconds).
- Insert a plastic blade into the gap between the lid and the case (start at the bottom edge where the USB-C connector is).
- Carefully swipe the perimeter, separating the glue. Don't force it, the lid is attached to the latches!
When you take the lid off, you'll see a battery pack with black adhesive tape -- you need to tweak it carefully and remove it -- underneath it, you'll find the motherboard mount screws. Don't try to disconnect the battery right away -- first, you'll turn off the display plumes!
The phone is disconnected from the network and discharged to 30%|
Removed the back cover and protective film from the battery|
All tools (dryer, sucker, shoulder blades) are prepared)|
Workplace cleaned of garbage and covered with soft cloth|
Photos of internal wiring of plumes (for reverse assembly)-->
Disabling the display plumes
The most critical step is to disconnect the flexible plumes that link the display to the motherboard, and Redmi Note 7 has three:
- 📱 Main display plume (transmits the image from the motherboard to the matrix).
- ✍️ Touchscreen plume (responsible for touch input).
- 🔦 Lighting plume (controls the brightness of the screen).
Procedure:
- With the help of tweezers or a plastic blade, carefully lift the black lock on the connector of the main plume (it clicks from above).
- Remove the plume by pulling it parallel to the board (not up!).
- Repeat the procedure for the touchscreen plume (the connector is nearby, but smaller in size).
- The backlight plume usually does not have a fixator - it can simply be pulled out.
Important: If the plume doesn't respond, don't use force! It's probably glued to the connector. Put some isopropyl alcohol on the base and wait 10 seconds for the glue to soften.
⚠️ Warning: Never touch the plume contacts with your fingers - fat and sweat can cause oxidation. Use tweezers or special silicone gloves.
What do I do if the plume is broken?
Heating and removal of the display module
Redmi Note 7 display is attached to double-sided glue 3M, It's a module that, when heated, becomes elastic:
- Set the hair dryer at 80-90°C and start warming up the edge of the display (starting at the top where the speaker is located).
- Keep the hair dryer at a distance of 3-5 cm, constantly moving it so as not to overheat the plastic.
- After 1-2 minutes, try to put a plastic blade on the display. If you don't, we'll heat it for another 30 seconds.
- As soon as the shoulder blade enters the gap by 1-2 mm, run it around the entire perimeter, separating the glue.
When the display is separated, don't take it off completely -- it's still connected to the body with a thin proximity sensor plume! Carefully raise the module to 45.° and disconnect this plume (the connector is under the battery).
If the glue is too strong, you can use a thread or guitar string:
- Squeeze the thread under the display from one of the corners.
- With peeling movements (forward-back), cut the glue.
- Periodically drip isopropyl alcohol on the thread to facilitate the process.
| Method of heating | Temperature. | Time. | Pluses | Cons |
|---|---|---|---|---|
| Fen | 80–90°C | 1-2 minutes | Quick, evenly. | Risk of plastic overheating |
| Infrared station | 60–70°C | 3-5 minutes | Safe for electronics | Expensive, need equipment. |
| Hot air (iron) | 50–60°C | 5+ minute | Resources available | Uneven heating, high risk of damage |
| String/string | No heat without heating. | 10-15 minutes | Minimum risk to electronics | Long, requires skill. |
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If the display cracks, before heating, stick a cross-cross tape on it - this will prevent the fragments from scattering and protect your hands.
Replacement of glass only (without module)
If you only have a glass crack and the matrix and touchscreen are working, you can try to separate the layers of the display module, a process called delamination, and it takes a lot of care.
You'll need:
- 🔥 Infrared lamp or hair dryer with narrow nozzle.
- 🧴 Special delimation solution (e.g, LOCA Glue Remover).
- 📏 Thin metal blade (0.1–0.2 mm thick).
- 🛡️ Safety glasses and gloves (shattered glass and solvent vapor are dangerous!).
Step-by-step:
- Place the display module in a sealed solvent bag for 10-15 minutes (this will soften the adhesive between the glass and the sensor).
- Heat the module with a hairdryer (temperature 50)°C) and start separating the glass with a metal blade from the corner.
- As soon as the glass starts to move away, suction it with a suction cup and slowly pull it up.
- After removing the glass, clean the remains of the glue with the touchscreen with isopropyl alcohol.
⚠️ Attention: When delimination inevitably damages the oleophobic coating (repulsive fat), after the glass is replaced, the screen will get dirty faster and will have to be polished with a special paste (for example, Nano-Coating Restorer).
If you are not sure about your skills, it is better to replace the entire module - the cost of a new glass with installation in the service often exceeds the price of a full-fledged display module.
Assembly and performance check
After replacing the display or glass, you need to properly assemble the phone to avoid sensor or backlight problems.
- Clean the seat on the phone frame from the remnants of old glue (use alcohol and a lilac-free napkin).
- Apply new glue: For a complete module replacement: Use a 0.2 mm thick double-sided tape (e.g., 0.2 mm thick, 3M For glass replacement: apply UV-glue, LOCA) and irradiate with a UV lamp.
Connect all the plumes in reverse order (first the proximity sensor, then the touchscreen, then the main plume).
connector locks are snapped
- Does the sensor (multi-touch, gestures) work?
- Are there any artifacts on the screen (broken pixels, stripes).
- Is the autobrightness working correctly?
If the sensor is delayed or floating after assembly, it's likely that the touchscreen plume is not well fixed in the connector, turn off the phone, check the connector, and, if necessary, clean the contacts with alcohol.
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The most common mistake in assembly is forgetting to plug in the proximity sensor plume, which keeps the screen from going out during the call!
Common Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when replacing the Redmi Note 7 display. TOP-5 Problems and ways to prevent them:
- 🔥 Overheating of fees → Use a dryer at a minimum temperature (maximum 90).°C) and warm at short intervals.
- 🧲 Damage to plumes → Never pull the plume upwards - only parallel to the board!
- 🔋 Battery breakage → Before heating the display, unplug the protective film and loosen the glue under the battery.
- 📱 A broken touchscreen → Check the compatibility of the new module (must be stitched under your model).
- 🔌 Short circuit. → Always turn off the battery before working with a fee!
If the phone does not turn on after replacing the display, check:
- Is the battery connected (sometimes the plume leaves during assembly).
- Is there any visible damage on the motherboard (blackened elements, bloated capacitors).
- Are all the plumes (especially the proximity sensor) properly installed?
If the screen flashes or shows artifacts, the problem may be:
- Poor contact of the display plume (reconnect).
- Damaged matrix (replace module)
- Faulty graphics chip on the board (requires diagnosis in the service).
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If you've got waves after you've changed the display, you've got the glue unevenly applied, take the phone apart and glue the module back.