Touch screen Xiaomi Redmi 6A — One of the most vulnerable parts of a smartphone: falls, bumps, or even prolonged use can lead to cracks, “dead zones” or complete failure of the touchscreen. If your device stopped responding to touch, shows "ghost" presses or the screen is covered with a web of cracks - do not rush to carry it to the service center. 6A It is quite possible even for a beginner, provided that accuracy and proper preparation are provided.
In this article you will find step-by-step instructions with a photo, a list of necessary tools, tips for choosing spare parts and unique nuances for the model. 6A (For example, the features of turning off the battery plume without risking damage to the power controller.We will also analyze the typical errors that lead to a broken display after replacement, and give recommendations for calibrating the new sensor.
The average cost of replacing a touchscreen in the service is from 2500 to 4000 rubles (depending on the region and the quality of the spare part). Self-repair will cost 2-3 times cheaper, but will require patience and attention to detail. If you are ready, then get started!
Preparation: tools and spare parts
Before you take down the Redmi 6A, Make sure you have everything you need, and not even one tool can damage the plumes or the body.
- 🔧 Screwdriver kit: cross-haired PH00 (for shell screws) and flat 1.5 mm (for latching).
- 📱 New touchscreen: original (article) MDG6) or a qualitative analogue (for example, from OEM-manufacturers such as Tianma or BOE).
- 🧲 Suction cup (diameter 4-5 cm) to separate the screen from the body.
- 🔥 Dryer or thermo-air station (power of at least 300 W) for softening the adhesive.
- 📏 Plastic mediators (2-3 pieces) or guitar mediators for separating glued parts.
- 🔌 Tweezers with thin ends for working with plumes.
- 🧴 Isopropyl alcohol (90%+) Cleaning contacts and removing glue residues.
- 🔋 External battery (Power Bank) with USB-Type-C cable to test the screen before final assembly.
Important: don't use metal tools to separate the screen, they can damage the plumes or leave scratches on the frame. If you don't have a thermo-air station, a building hair dryer will do, but watch the temperature: overheating above 80.°C can deform plastic elements of the housing.
⚠️ Attention: If your Redmi is 6A When you are in the water or have been vibrating (for example, after falling from a height), before replacing the touchscreen, check the integrity of the display controller on the motherboard. In such cases, replacing the screen may not solve the problem, and the money will be wasted.
Choice of touchscreen: original vs analogues
There are three types of touchscreens for Redmi on the market 6A:
- Original (OEM) — manufactured by the same factories as Xiaomi.Article: MDG6 (for a version with a Tianma display; or MDG6-BOE. Pros: perfect color reproduction, lack of "yellow" shades, long service life. Cons: high price (from 1800 rubles) and the risk of running into a fake.
- Quality analogues - manufactured by Tianma companies, BOE, Cost: 1000-1500 rubles. the characteristics are almost not inferior to the original, but may have minimal differences in brightness.
- Budget copies - cheap screen modules (400-800 rubles) without specifying the manufacturer. Risks: poor sensitivity, "broken" pixels, rapid wear of the sensor.
How to check the originality of the touchscreen when buying:
- 📦 The package must have a holographic sticker with a serial number.
- 🔍 On the screen (under the protective film) is marked the manufacturer (Tianma or BOE).
- 📱 Connect the screen to the phone before installation: the original should not have color skews or "ripples" when scrolling.
| Type of touchscreen | Price (ruble) | Term of service | Sensitivity | Color rendering |
|---|---|---|---|---|
| Original (OEM) | 1800–2500 | 3-5 years | 100% | Perfect. |
| Analogue (Tianma/BOE) | 1000–1500 | 2–4 years | 95–98% | Minor deviations |
| Budget copy | 400–800 | 0.5 to 1.5 years | 70–85% | Yellow, ripples. |
Tip: If you buy a touchscreen on AliExpress or eBay, pay attention to the reviews with the photo. Often sellers indicate that the screen is "fully compatible", but in fact it may not fit the plume connector. 6A Only modules with 30-contact connector (Redmi) 6/6 Pro — 40-contact!).
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Before buying a touchscreen, remove the back cover of your Redmi. 6A And check the markings on the old screen, and if it says "Tianma," take a screen that's marked the same, and it's 100% compatible.
Step-by-step disassembly of Xiaomi Redmi 6A
Redmi's disassembly 6A It requires care: the body is held on latches and double-sided tape, and the plumes are very fragile.
Step 1: Turn off and prepare the phone
Turn off your smartphone completely. If the screen doesn't respond to touch, hold the Power button 10-15 seconds until you vibrate. Remove the tray for the touch. SIM-cards by means of a paper clip or special key.
Step 2: Heating the body
Turn on the dryer at minimum power (or set the temperature 60-70)°C at thermo-air station). evenly warm the back cover for 2-3 minutes, paying special attention to the edges. This will soften the glue and facilitate separation.
The phone is turned off and the battery is removed (if possible)|Heated back cover around the perimeter|Plastic mediators prepared|Screwdrivers and sucker on hand-->
Step 3: Rear cover separation
Suction the suction cup onto the bottom of the case (near the USB-Type-C connector) and pull up. Once the lid has moved a little, insert a plastic mediator into the slot and gently swipe it around the perimeter to separate the latches. Don't force it -- if the lid doesn't lend itself, warm it up again.
After removing the cover, you will see:
- 🔋 Battery (stick to the body).
- 📶 Antenna contacts (don't touch them!).
- 🔌 Battery plume connector (you need to turn off first!).
Step 4: Shutting off the battery
With a plastic mediator or tweezers, gently tuck the battery plume connector (it's under a black insulation tape) Don't pull the wires -- just behind the connector itself! This will prevent short circuits from breaking down further.
⚠️ Warning: If you skip this step and start disconnecting the screen plumes from the battery connected, you risk burning the power controller (chip) PM660 It's a motherboard replacement costing 3,000 to 5,000 rubles!
Step 5: Disconnect the screen plumes
Under the battery plume you will find a metal plate screwed by two screws. PH00. Unscrew them and remove the plate. There are two plumes underneath:
- The top is the display plume (responsible for the image).
- The bottom is the plume of the touch screen (responsible for touching).
Disconnect both plumes with tweezers, pulling the black "tongues" of the connectors.
Step 6: Remove the Old Screen
The screen module is glued to the frame with double-sided tape, warm it up with a hair dryer on the front side (temperature 50-60).°C) and gently apply the mediator around the perimeter, once the screen has separated, remove it and clean the frame of the glue residue with isopropyl alcohol.
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Do not use a knife or metal tools to separate the screen – this is the main source of damage to the plumes and motherboard.
Installation of a new touchscreen
Before installing the new screen, check its performance.
- Connect the plumes of the new touchscreen to the motherboard (first the display, then the sensor).
- Connect the external battery (Power Bank) to the USB-Type-C connector.
- Hold the power button for 5-10 seconds. If the screen catches fire and reacts to touch, you can continue.
If the screen is not switched on:
- 🔌 Check the density of the plumes in the connectors.
- 🔋 Make sure the battery is turned off (even if the phone is off, there may be voltage on the board).
- 📱 Try connecting another power source (such as a charger).
Applying new glue
To fix the screen, use a two-way scotch 3M 9088 (0.2 mm thick) or liquid adhesive B-7000. Apply the glue in a thin layer along the perimeter of the frame, retreating 1-2 mm from the edges (so that the glue does not fall on the plumes).
Carefully attach the new screen, combining the holes under the speaker and the front camera. Press it evenly throughout the area (you can use a heavy book).
Phone assembly
Collect the phone in reverse order:
- Connect the touchscreen and display plumes.
- Set a metal plate and twist the screws.
- Connect the battery plume.
- Close the back cover, starting at the top (near the camera).
After assembly, turn on the phone and check:
- 🎨 Color rendering (is there a yellow tint).
- 👆 Touchscreen sensitivity (check multi-touch in the Touch Screen Test app).
- 🔊 The speaker and microphone (sometimes when changing the screen, contacts are lost).
What if the screen does not work after assembly?
Calibration of the touch screen after replacement
Even the original touchscreen may require calibration after installation. If the touches are not recorded accurately (for example, the presses are side-shifted), follow the following steps:
Method 1: Through the Engineering Menu
Open the phone application and enter the combination:
##6484##From the Touch Screen Test menu, select Calibration and follow the on-screen instructions (usually press 4-5 points).
Method 2: Using third-party software
Install the Touchscreen Calibration or Display Tester app from Google Play. These tools allow you to:
- 📊 Check multi-touch (up to 10 touches at the same time).
- 🎯 Calibrate sensitivity.
- 🔍 Identify the dead zones».
If calibration doesn’t help, the problem may be:
- 🔌 The loose fit of the touchscreen plume.
- 📱 Damage to the sensor controller on the motherboard (Synaptics chip) S3706).
- 🛠️ Defect of the touchscreen itself (especially if it is a budget copy).
Common Mistakes and How to Avoid Them
Even experienced masters sometimes make mistakes when replacing touchscreen with Redmi. 6A. Here are the most common ones and how to prevent them:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Use of metal tools | Scratches on the body, damage to plumes | Use only plastic mediators |
| Overheating of the screen with a phenome (>80°C) | Deformation of plastic, detachment of polarization film | Keep the temperature within 60-70°C |
| Connecting the plumes with the battery on | Short circuit, failure of the power controller | Always turn off the battery first. |
| Incorrect installation of metal plate on plumes | Bad contact, screen flickering | The plate should fit tightly to the connectors. |
| Use of poor quality glue | The screen will fall off in 1-2 weeks | Use only 3M 9088 or B-7000 |
Another common problem is ghost touches after changing the screen, which are caused by:
- 🔌 Bad contact of the touchscreen plume (reconnect it).
- 📱 Static electricity (discharge yourself by touching a grounded object before work).
- 🛠️ Defect of the screen itself (return it to the seller if the warranty allows you to do so).
⚠️ If after replacing the touchscreen phone stopped charging, check the integrity USB-It's easy to damage when you pull the cable hard, and you'll need to replace the connector (cost about 800 rubles).
Cost of repair: independently vs service
Let’s compare the cost of replacing the touchscreen with your own hands and in the service center:
| Item | Independently. | Service centre |
|---|---|---|
| Touchscreen (original) | 1800–2500 rubles | Included in the price |
| Touchscreen (analogue) | 1000-1500 rubles | Included in the price |
| Tools | 300-500 rubles (if you buy) | — |
| Work of the master | — | 1500–2500 rubles |
| Total (with original screen) | 2100-3,000 rubles | 4000-6500 rubles |
| Total (with analogue) | 1300–2,000 rubles | 2500–4,000 rubles |
The benefits of self-repair are obvious, but keep in mind:
- ⏳ You will spend 1.5-3 hours of time (in the service - 30-60 minutes).
- 🔧 The risk of damage to the phone in the absence of experience (the service gives a warranty of 1-3 months).
- 🔄 If something goes wrong, expensive motherboard repairs may be required.
If you have shaking hands or no experience with small details, you should contact the service, and if you are confident in your abilities, replacing yourself will save up to 50% of your budget.