If the touch screen of your Xiaomi Redmi 6 suddenly stopped responding to touch, it does not always mean that the display breaks. In 60% of cases, the problem is solved without visiting the service center - it is enough to correctly diagnose the cause and apply one of the proven methods. The smartphone of this model, released in 2018, still remains popular due to the balance of price and functionality, but its touchscreen is based on the Synaptics controller. S3706 has a number of typical "diseases".
Users often confuse hardware malfunctions with software failures, such as after a phone drop or moisture hit, symptoms may coincide with the effects of a failed update. MIUI. We'll look at all the scenarios, from the usual contamination of the screen to the damage to the plume, and we'll also checklist for self-diagnosis. Importantly, some methods (such as factory resets) will lead to data loss, so prepare a backup copy in advance.
According to statistics of Xiaomi service centers, in 2023-2026 the most common causes of a broken touchscreen on Redmi 6 were distributed as follows:
| Reason. | Proportion of cases | Can I correct myself? |
|---|---|---|
| Software failure (MIUI, applications) | 35% | Yes. |
| Pollution/damage to the sensory layer | 20% | Yes (partially) |
| Touchscreen plume disconnection | 25% | No (disassembly required) |
| Damage to Synaptics Controller | 15% | No. |
| Mechanical damage to the matrix | 5% | No. |
1. Diagnosis of the problem: how to determine the cause
Before you start repairing, you need to understand what exactly went wrong. The Redmi 6 touchscreen consists of three key components:
- ๐น Touch layer (digitizer) - transparent film that registers touches.
- ๐น Touchscreen Controller (Synaptics) S3706) โ signal-processing chip.
- ๐น Connection plume โ a flexible cable that connects the screen to the motherboard.
Take the step test:
- Connect your phone to charge. If the charger lights up, but the screen stays black, the problem is the backlight or the matrix.
- Try unlocking your phone with the power button, and if you have an unlock sound, but the image is missing, the matrix or the plume is faulty.
- Connect your phone to the PC by USB. If the computer detects the device but the screen does not respond, the problem is in the touch layer or controller.
- Check the response to touch in safe mode (press the power button). โ "Safe Mode. If the touchscreen works, it's third-party software.
Critical symptom: If the screen responds only to a strong press or in certain areas (for example, only at the edges), this indicates damage to the touch layer or detachment of the plume, in such cases, self-repair is impossible - you need to replace the screen or solder the contacts.
2. Software solutions: when firmware or applications are to blame
If the diagnostics show that the hardware is fine, start with the software methods.
- ๐ฑ Updates MIUI (especially 11-to-12 version).
- ๐ Installation of custom firmware (for example, LineageOS).
- ๐ฎ Launching Resource-intensive Games (PUBG Mobile, Genshin Impact).
- ๐ ๏ธ Use of โoptimizersโ or โcleanersโ of cache.
Method 1: Reboot to Safe Mode
Press the power button for 5 seconds. โ Select "Safe Mode." This mode only runs system applications:
Remove newly installed applications
Clear the cache through Settings โ Annexes โ All applications
Turn off Optimization. MIUI" In Settings โ Battery
Restart your phone in normal mode-->
Method 2: Resetting the touchscreen settings
Redmi 6 has a hidden sensor calibration function to activate it.
- Open the phone app.
- Dial the code: ##6484###.
- In the menu that opens, select "Test Mode" โ "Touch Screen Test".
- Follow the instructions on the screen (touch the crosses for calibration).
โ ๏ธ Note: If nothing happens after entering the code, your version MIUI I've blocked the engineering menu, and in this case, the only thing that's going to help is resetting to the factory settings.
Method 3: Reverse the MIUI Update
If the problem occurs after the system update:
- Go to Settings โ About the phone โ System update.
- Click on the three dots in the upper right corner โ "Select the Service Pack".
- Download the previous version MIUI Redmi 6 (codename: cereus) from Xiaomi Firmware Updater.
- Select the downloaded file and wait for the rollback.
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Before rolling back the update, create a backup through Settings โ Additionally. โ Backup. Use Mi Cloud or Local Storage.
3. Hardware malfunctions: when without repairs can not do
If the software methods didn't work, the problem is the hardware.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| The screen only responds to a strong press. | Detachment of the sensory layer or plume | Screen replacement or plume re-painting |
| Touchscreen works, but with a delay (laid) | Damage to Synaptics Controller | Replacement of the controller or the entire screen |
| Part of the screen does not respond (e.g., right edge) | Mechanical damage to the digitizer | Replacement of the sensor layer |
| The screen is completely dead (no image or reaction) | Breakage of the plume or damage to the motherboard | Diagnostics in the service |
Self-examination:
- ๐ฆ Light a flashlight at an angle on the screen, and if you see rainbow film or bubbles, the touch layer has moved away from the matrix.
- ๐ Listen to the sounds when you press the screen. A crunch or creak indicates cracks in the glass.
- ๐ง Check the charging connector and speakers for corrosion (green plaque) - a sign of moisture getting into the car.
โ ๏ธ Warning: If the phone has fallen into water or been in a wet environment, do not turn it on until it is completely dry (minimum 48 hours in rice or silica gel.
Interim solution for detached plume:
If the screen only reacts when you press a certain area (for example, the lower left corner), this may indicate a microcrack in the plume.
- Carefully remove the back cover (use a plastic shoulder blade).
- Find the touchscreen plume (a thin orange cable running from screen to board).
- Easy press the plume at the connection point with the connector.
- Set it on a scotch (do not use glue!).
What happens if you ignore the detached plume?
4. Replace the screen with your own hands: step-by-step instructions
If the diagnosis shows that you need to change the screen, you can do it yourself. Redmi 6 refers to phones with a collapsible body, but the process requires care.
- ๐ง Set of screwdrivers (cross, flat, Torx) T3).
- ๐ฑ Plastic blades for disassembly.
- ๐ฅ Fryer (for softening glue).
- ๐งฒ Magnetic mat (so as not to lose the screws).
- ๐ ๏ธ New screen for Redmi 6 (model: LM1805E702 or LM1805E703).
Step-by-step process:
- Turn off the phone and remove it. SIM-card.
- Heat the screen edge dryer (~60ยฐC) for 2-3 minutes to soften the glue.
- Put a plastic blade on the screen, starting at the bottom, and be careful, the touchscreen plume is on the top.
- Disconnect the battery and screen plumes (use tweezers).
- Move it to the new screen: Speaker and microphone (sticked on double-sided tape), camera and proximity sensor, home button (if physical).
Connect the new screen
until final assembly
Put on a new glue.
B-7000
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The most common mistake when replacing a screen is to damage the battery plume. Always turn it off first and plug it in last!
Where to buy spare parts:
- ๐ AliExpress โ original and non-original screens (price: 1,500โ3,000) โฝ).
- ๐ฌ Local service centers โ often sell used parts with a guarantee.
- ๐ Shops such as "FixPrice" or "Svyaznoy" - sometimes available (price is higher by 30-50%).
โ ๏ธ Warning: When buying a screen, check if the screen includes duct tape for plumes. Without it, the screen can depart in 1-2 weeks.
5. Alternative ways to control the phone without touchscreen
If repairs are delayed and the phone needs to be used urgently, use alternative management methods:
Method 1: Connecting the mouse to USB-OTG
This will require:
- ๐ฑ๏ธ USB-mouse (wired or wireless with adapter).
- ๐ Transitioner USB-C/OTG (for Redmi 6 Any universal will do).
Connect your mouse to your phone, and the cursor will appear on the screen. Right-click to call the context menu (an analogue of long-pressing).
Method 2: Control over PC (Mi PC Suite)
- Download Mi PC Suite and install it on your computer.
- Put the phone on. USB (set up the debugging USB In Settings โ The phone. โ Version. MIUI โ 7 times press the version โ return to "Additional" โ "For developers").
- In the program, select "File Management" or "Backup".
Method 3: Google Voice Assistant
If the screen is slightly responsive to touch:
- Activate Google Assistant (long press on the Home button).
- Say, "OK, Google, turn on voice input."
- Now you can dictate the commands: "Open WhatsApp", "Call Mom", "Enable flashlight".
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For convenience, create a Google Assistant shortcut on your desktop. To do this, download the Activity Launcher app and search for Google App" โ "Assistant".
6. When to contact the service: prices and guarantees
If self-repairing didn't help or you're not confident in your abilities, contact the service.Average prices for Redmi 6 repairs in 2026:
| Type of repair | Cost (โฝ) | Time (hours) | Guarantee |
|---|---|---|---|
| Replacement of touch glass (digitizer) | 1 200โ2 500 | 1โ2 | 3 months |
| Replacement of the entire screen (matrix) + touchscreen) | 2 500โ4 000 | 2โ3 | 6 months |
| The cross-ploughing of the touchscreen plume | 1 500โ3 000 | 3โ5 | 1 month |
| Replacement of Synaptics controller | 2 000โ3 500 | 4โ6 | 3 months |
| Diagnosis + cleaning of contacts | 500โ1 000 | 1 | No guarantee. |
How to choose a service:
- ๐ Check reviews on Yandex.Maps or 2GIS.
- ๐ Ask if you have a work guarantee and spare parts (at least 3 months).
- ๐ฐ Check whether the cost of spare parts is included in the price or it will have to be paid separately.
- ๐ธ Ask to show the new screen before installation (it should not be scratched or stained).
โ ๏ธ Note: Some services offer budget repairs using used parts, often with hidden defects (such as broken pixels or uneven backlighting.
Xiaomi Service Centers in Russia:
- ๐ Moscow: Official SC (Letnikovskaya Street, 10; Baumanskaya M).
- ๐ St. Petersburg: Grand Canyon shopping center (154 Engels Avenue).
- ๐ Regions: list of partner services on mi.com.
7.Prevention: How to Avoid Touch Screen Problems in the Future
To extend the life of the Redmi 6 screen, follow the following simple rules:
- ๐ก๏ธ Use tempered glass (at least 0.3 mm thick) and a case with protrusions at the edges.
- ๐ฟ Avoid moisture, even if the phone is "waterproof" by standard. IP53, It's just a splash protection.
- ๐ Do not use your phone while charging if the cable is damaged โ this can cause power surges.
- ๐ฎ Do not play games with a low battery charge (less than 20%) โ this increases the load on the power controller.
- ๐งน Clean the screen regularly with microfiber and alcohol (at least 70%).
What you absolutely cannot do:
- ๐ฅ Heat your phone (for example, leave it in the sun in your car).
- โ๏ธ Refrigerate (for example, take out of a warm room in the cold).
- ๐จ Pressing on the screen with force (for example, during cleaning).
- ๐ Use non-original chargers (especially with output current) >2A).
๐ก
The most common reason for the Redmi 6 touchscreen failure is mechanical damage (falls, bumps), and even a micro-crack in the glass can eventually lead to detachment of the sensor layer.
Recommended accessories for protection:
- ๐ฑ Spigen Tough Armor or Ringke Fusion-X (shock protection).
- ๐ฎ Tempered Glass: AmFilm Tempered Glass (with oleophobic coating).
- ๐ External battery: Xiaomi Power Bank 3 (to avoid planting the native battery).