Why the Redmi 8A touchscreen might stop working
The Xiaomi Redmi 8A touchscreen is one of the most vulnerable elements of a smartphone. If your device suddenly stops responding to touch, the causes can range from software failures to physical damage. Most often, the problem occurs after a fall, moisture or a failed system update. But even without visible damage, the display module can fail due to wear of the plume or factory defects.
It is important to distinguish between total sensor failure (the screen does not respond at all) and partial failures (hangs, incorrect touches). In the first case, usually a hardware defect is to blame, in the second case, a software conflict. For example, after installing custom firmware or resetting settings, ghost presses or response delays can occur, and often the problem manifests itself when the battery charge is low (less than 15%) or the device is overheated.
Before you take your phone to the service center, try to diagnose the problem yourself. In 60 percent of cases, the malfunction is fixed without disassembling the device — just follow a few simple steps. Below we will discuss all possible causes and solutions, from the simplest to radical measures.
Basic checks: what to do first
If the Redmi 8A screen doesn't respond to touch, start with the basics. Sometimes the problem is the trivial things that users overlook.
- 🔋 Check the battery. Connect the phone to the charger for 30 to 60 minutes. At a critically low charge (less than 5%), the sensor can shut down even if the indicator shows the remaining power. Use the original cable and power supply.
- 🧤 Take off the protective film or the glass. Cheap accessories sometimes create an electrostatic layer that interferes with the sensor.
- 📴 Reboot the device forcefully. Press the Power button. + Increase volume by 10-15 seconds until the logo appears MI. This will reset the temporary OS errors.
- 🔌 Connect a known working charge. A faulty adapter can cause voltage surges, leading to malfunctions in the display module.
If the sensor is activated after this manipulation, the problem was temporary, but if the screen responds only to a part of the touches or is working with a delay, this may indicate that the plume or matrix is beginning to fail - the sunoon will need repair.
⚠️ Attention, do not use alcohol wipes or aggressive detergents to clean the screen, they destroy the oleophobic coating and can penetrate the glass, damaging the touch layer.
2. Software failures: resetting settings and software updates
Firmware errors are the second most common cause of sensor failure, especially for Redmi 8A after upgrading to MIUI 12/13 or installing custom ROMs, and factory resets or flashing help in these cases.
Reset via Recovery Mode
If the screen is not responding but the phone is turning on, try resetting through Restore mode:
- Turn off the device (press the power for 20 seconds).
- Press Power + Volume Up until the Recovery menu appears.
- Use volume buttons to navigate, select Wipe Data → Wipe All Data.
- Confirm the action and wait for the process to be completed.
Once it's reset, it'll restart in its original state, and if the sensor is up, it's the software problem, and if it's not, move on to the next step.
Update or flash through Fastboot
For power users: if the reset didn't work, try reflashing the device via Fastboot. Download the official firmware for Redmi 8A (codenamed olivelite) from Xiaomi's website and follow the instructions:
fastboot flash all firmware.zip
fastboot reboot⚠️ Attention! Fastboot flashing erases all data, including photos and contacts. Pre-remove the memory card if it is used.
Download the official firmware for olivelite
Install ADB/Fastboot drivers on PC
Unclose the firmware in a folder without Cyrillic
Charge your phone to at least 50%
Connect USB-cable to the back port of the PC (for stability)
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3. Diagnostics of hardware malfunctions
If the software methods don't work, the problem is probably hardware. Redmi 8A most often fails:
- 🔧 The plume of the display module - rubbed or moves away from the connector after falls.
- 📱 The sensor layer of the matrix – cracks under strong impacts (even without visible damage to the glass).
- 🔌 The sensor controller on the motherboard - burns out with short circuits.
For diagnosis, follow the following steps:
| Symptoms. | Probable cause | Decision |
|---|---|---|
| The screen doesn’t respond at all, but the lighting works. | The train is disconnected or the controller is out of order. | Disassembly and inspection of connections |
| The sensor only works in the upper/lower part. | The plume or matrix is damaged. | Replacement of the display module |
| The screen responds to late touches | Wear of the sensor layer or overheating of the processor | Cleaning from dust, replacing thermopaste |
| Ghost presses (spontaneous swipes) | Moisture falling under the screen or damage to the controller | Drying or matrix replacement |
For accurate diagnosis, you can use the Xiaomi test mode:
- Enter the code in the phone app: ##4636##.
- Select Testing → Touch Screen Test.
- Check if your touches are displayed on the screen.
How to check the plume without disassembly?
4. Temporary solutions if repair is not possible
If you can not immediately take the phone to the service, but you need to urgently access the data, use these methods:
- 🖱️ Connect. USB-mouse-wise OTG-adapter. 8A supports cursor control, which will allow you to copy files or make a backup copy.
- 📱 Use a voice assistant. Activate Google Assistant with a voice command, OK, Google, and try to control your phone through voice queries.
- 🔄 Turn it on. USB-If you have previously activated this option in the Developer Settings, you can connect to the phone via ADB And run it from the PC.
You will need to connect the mouse. OTG-The Type-C adapter, when you plug in the mouse, the screen splits into two zones: the left for the cursor, the right for the keyboard, and you can use the device temporarily until you have repaired it.
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If you don't. OTG-Adapters can be made from the old one. USB-cable, soldering a resistor 51 k Ohm between the contacts ID and GND. The schema of the schema is in open sources.
5 Disassembly and replacement of the display module
If the diagnostics show a hardware malfunction, you'll have to disassemble the phone. Replacing the display module with the Redmi 8A is a medium-sized repair, and requires care.
- 🔧 Set of screwdrivers (cross, flat, flat, T3, T5).
- 🧲 Screen suction cup.
- 🔥 Hair dryer or thermo-air station (for softening glue).
- 📦 New display module (original or qualitative analogue).
Step-by-step:
- Turn off the phone and remove it. SIM-map.
- Heat the screen edge with a hair dryer (60–70°C) for 2-3 minutes.
- Suck the suction display and carefully separate it from the body, starting at the bottom edge.
- Disconnect the battery and display plumes (use a plastic mediator).
- Install the new module in reverse order, checking the density of the plumes.
⚠️ Attention, when you're disassembling Redmi 8A It's easy to damage the flexible fingerprint scanner plume, and if it breaks, the sensor will stop working even after the screen is replaced.
The cost of the new display module for the Redmi 8A in 2026 is 1,200-2,500 rubles, depending on the quality. Original parts can be found under the article MDY10-001-01 (for the version with a Type-C connector).
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When buying a display module, be sure to check whether the set includes adhesive tape for fixation. Without it, the screen will "walk" and may depart in a few days.
6. Alternative repair methods
If screen replacement is too expensive or temporarily impossible, consider alternative options:
- 🔧 If the problem is oxidized contacts, they can be purified with alcohol and soldered, which is a temporary solution, but can extend the life of the phone by several months.
- 📱 Use of external display. HDMI-Type-C adapter can be connected to Redmi 8A To the monitor and control it with the mouse.
- 🔄 If the repair is unprofitable, you can get 1,500-3,000 rubles by selling working components (battery, motherboard, camera).
For soldering of the plume you will need a soldering station with a thin sting (0.5-1 mm) and flux RMA-223. The process requires experience, so it is better to entrust it to a professional. The cost of such a service in service centers is from 800 rubles.
If you’re connecting your phone to an external display, consider that Redmi 8A only supports Mobile High-Definition Link (MHL) display. This requires a Type-C → HDMI adapter that supports DisplayPort Alt Mode.
7.Prevention: How to avoid sensor problems in the future
To extend the life of the Redmi 8A display module, follow these guidelines:
- 🛡️ Use a high-quality case with shock absorbing inserts at the corners, which will reduce the risk of damage when falling.
- 🚫 Avoid overheating. Do not leave your phone in direct sunlight or near heat sources (e.g. on a car torpedo).
- 🔋 Charge with the original adapter. Cheap charges can cause power surges that damage the sensor controller.
- 💧 Do not use your phone in wet conditions, even a slight humidity can cause the plume contacts to oxidize.
- 📱 Update the software regularly. In new versions MIUI Errors related to sensor operation are often corrected.
Pay special attention to cleaning the Type-C connector. Dust and debris can cause short circuits that cause a malfunction of the display. Use a wooden toothpick and a can of compressed air to clean.
If you drop your phone a lot, consider installing a tempered glass with an oleophobic coating that not only protects against scratches, but also reduces the load on the touch layer when impacted.