Replacement of touchscreen on Xiaomi Redmi 4: a complete guide with the nuances of 2026

Xiaomi Redmi 4 is one of the most popular budget smartphones of 2016-2017, but even it is not immune to breakdowns. Most often owners face a cracked sensor, “dead” touch zones or a complete failure of the touch screen. If you decide to save and replace it yourself, this article will help avoid mistakes that make simple repairs expensive.

We're going to look at not only the standard replacement procedure, but also the hidden nuances of how to distinguish the original touchscreen from the fake, why the new sensor might not work after installation, and what to do if the repairs show up "ghost" touches, and what tools are really needed and what you can do without - this will save up to 30% of the budget.

Important: the instruction is relevant for all versions of Redmi 4 (Redmi 4 Pro, Redmi 4 Prime, Redmi). 4A and standard version), but there are critical differences in the disassembly - we will highlight them separately.

1. Diagnosis of malfunction: is it really the fault of the touchscreen?

Before ordering parts, make sure the problem is in the touch layer, not the motherboard or the plume.

• 🔍 Cracks on the screen with sensor malfunction in the area of damage (most often).
• 👆 «Dead areas where touches are not recorded or recorded with a delay.
• 👻 «Ghostly" presses - the smartphone opens the application or scrolls through the menu.
• 🔄 Complete inoperability of the touchscreen with a working display (there is an image, but touches do not respond).

If the screen doesn't turn on at all (black display), the problem may be in the display module, the plume, or even the firmware, in which case replacing the touchscreen will not help.

⚠️ Attention: Redmi 4 is often characterized by "semi-sensor syndrome" - when the touchscreen only works after rebooting or when connected to a charge - a sign of damage to the contacts of the plume on the motherboard, not the sensor itself.

For accurate diagnosis:

1. Connect your smartphone to your PC through USB-OTG And check if it's responding to the mouse. If so, the problem is the touchscreen.
2. Call the phone: if the call is received, but the screen does not respond, the sensor or plume is to blame.
3. Try a hard reset (clamp down the power supply) + Volume up for 10 seconds. Sometimes the sensor comes to life after rebooting.

2. Touchscreen selection: original vs. copy and where to buy

There are three types of touchscreens in the Redmi 4 parts market:

How to distinguish the original from the fake when buying:

• 🔎 Packaging: the original comes in Xiaomi's trademark box with hologram and serial number.
• 📏 Glass thickness: the original glass is thinner (about 0.55 mm), copies - 0.7 mm and thicker.
• 🎨 Color rendering: the original does not have yellow when viewed from an angle.
• 🔧 The train: the original is flexible, with clear markings MI or Redmi.

⚠️ Attention: Redmi 4 Pro and Redmi 4 Prime are equipped with touchscreens with different plume connectors (24-pin vs. 30-pin). You need to refine the model before you buy it, and you have to cut and solder the incompatible plume, which makes it harder to repair.

Where to buy without risk:

• 🌍 Foreign stores: AliExpress (shops) HWSHOP Official Store, MI Global Store, Ebay (sellers rated 99%+).
• 🏬 Russian suppliers: MegaParts, GSMArena, FixMarket.
• 🔧 Local service centers: sometimes sell used originals after replacement.

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Before buying, check the reviews for the parts by the keywords oleophobic coating and ghost touch. If there are many complaints, look for another seller.

3. Necessary tools: what really needs to be done

To replace the touchscreen on Redmi 4 does not need a professional set for 10 000 ₽. Here is the minimum set that guarantees a successful repair:

• 🔧 Plastic mediators / spoons (2-3 pieces) - to separate the body.
• 🔨 Thin screwdriver cross (PH00) — screw.
• 🧲 Magnetic mat or tray - so as not to lose screws.
• 🔥 Hair dryer or thermo-air station - for softening the glue.
• 📱 Screen suction cup – necessarily with a metal ring.
• 🧴 Isopropyl alcohol (90%+) — glue-cleaner.
• 🔗 Double-sided tape or glue B-7000 — touchscreen.

What is NOT needed (common myths):

• ❌ The soldering iron - only if the plume is not damaged.
• ❌ Ultrasonic bath - for home repairs is excessive.
• ❌ Special screen tester – enough standard applications (for example, Touch Screen Test).

If you are disassembling a smartphone for the first time, take a kit for beginners (worth it). ~500 ₽ It's got all the tools you need, including plastic shoulder blades and a suction cup.

4. Step-by-step instruction: disassembly and replacement of the touch screen

The replacement process takes 1-2 hours with careful operation, follow the instructions strictly in order to avoid damaging the plumes or motherboard.

Step 1: Turn off and prepare the smartphone

Before the disassembly:

1. Turn off Redmi 4 and retrieve it. SIM-memory-card.
2. Heat the back cover with a hair dryer (a temperature of ~60°C) for 2-3 minutes to soften the glue.
3. Stick the suction cup closer to the bottom edge of the screen.

Step 2: Removal of the back cover

Carefully pull the suction cup while putting the lid on with a plastic blade around the perimeter. On Redmi 4, the lid is attached to the latches and glue - don't put too much effort into it!

Nuance: The Redmi 4 Pro makes the lid harder to remove because of the extra latches on the camera. If it doesn't, warm up with a hairdryer again.

Step 3: Shutting off the battery

When the lid is removed, first of all, disconnect the battery plume (it is under a black protective film) and use a plastic spatula to keep the contacts in check.

⚠️ Warning: If you don't turn off the battery, if you accidentally close the plume, the touchscreen can burn the power controller on the motherboard. ₽.

Step 4: Removing the old touchscreen

Now you have to separate the sensor from the display module.

1. Warm up the screen with a hair dryer (temperature) ~70°C) perimeter 3-5 minutes.
2. Insert a plastic spatula in the gap between the frame and the screen, carefully lead it in a circle.
3. When the glue softens, take off the touchscreen. If it's glued to the display, warm it up again.

On the Redmi. 4A The touchscreen and the display are often in the same module, and then you have to change the whole thing!

Step 5: Install a new touchscreen

Before installation:

• Clean the frame and display of the old glue with isopropyl alcohol.
• Check the integrity of the plume of the new touchscreen (there should be no clutters!).
• Apply a thin layer of glue B-7000 or bilateral tape around the perimeter of the frame.

Carefully apply a new touchscreen starting at the top, make sure the plume is not twisted.

Step 6: Assembly and testing

Collect your smartphone in reverse order:

1. Connect the touchscreen plume to the motherboard.
2. Fix the back cover (latches should stand with a characteristic click).
3. Connect the battery and turn on the phone.

To test, use the Touch Screen Test app (available on Google Play).

• Are all areas of the screen responsive?
• No ghost touches.
• Does multi-touch work correctly (simultaneous pressing in several places).

5 Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when replacing touchscreen with Redmi 4. TOP-5 problems and solutions:

The most common mistake of beginners is to damage the battery plume during disassembly. If the phone does not turn on after assembly, first check:

• Is the battery plume connected to the motherboard?
• Is there any visible damage to it (breaks, meltings).
• Is the voltage applied to the battery (can be checked with a multimeter).

⚠️ Warning: The Redmi 4 battery plume is very fragile. If you break it, don't try to solder yourself! ~300 ₽) or go to the service.

Another common problem is the new touchscreen's poor sensitivity, which is typical of cheap copies.

• Calibrate the sensor through the engineering menu (#6484##).
• Update the firmware to the latest version of MIUI.
• If nothing helps, replace it with a better part.

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If you have artifacts on the screen after you replace the touchscreen (strips, flickering), the problem is not the sensor, but the display module or the plume, and you need a comprehensive diagnostic.

6. Alternative repair methods: when replacement is not needed

It's not always the only way to replace the touchscreen, and in some cases, you can do with a cheaper or temporary solution.

• 🔧 Trail repair: If the oxidized contacts are the problem, they can be cleaned with a blower or alcohol solution. Cost: 0 ₽.
• 🔄 Flashing: sometimes the sensor gets bugged by a software failure. Try flashing the latest version. MIUI via Fastboot.
• 📱 Use of the OTG-Mouse: If the touchscreen is completely dead, but the display is working, plug the mouse through the USB-OTG adapter (stands) ~200 ₽).
• 🛡️ Glass replacement (if the sensor works): if only the glass cracked, and the touchscreen is serviceable, you can only replace it (cost) ~800 ₽).

For a temporary solution (for example, if you are waiting for a spare part), you can use the software keyboard:

1. Install Virtual Soft Keys from Google Play.
2. Activate. USB-debugging in the developer settings.
3. Connect your smartphone to your PC and control it via TeamViewer QuickSupport or Vysor.

If you're not sure about your abilities, contact the service.Average cost of replacing the touchscreen with a Redmi 4 in 2026:

• With his spare parts: 1,000-1,500 ₽.
• Turnkey (with spare parts): 2,500–3,500 ₽.

7. Care after replacement: how to extend the life of a new touchscreen

To make the new touchscreen last longer, follow simple rules:

• 🛡️ Use protective glass (preferably tempered with an oleophobic coating).
• 🧴 Regularly clean the screen with microfiber and special liquid (without alcohol!).
• 🔋 Avoid overheating – do not leave your smartphone in the sun or near the battery.
• 💧 Do not use your phone with wet hands – moisture reduces the life of the sensor.
• 📦 Store in a case with shock-absorbing inserts (such as Spigen or Ringke).

If you have a non-original touchscreen, be prepared for the following:

• The oleophobic coating will be erased after 3-6 months (solution: apply a new coating with a liquid composition, for example, Nano Liquid).
• Sensitivity may deteriorate over time (solution: periodic calibration through an engineering menu).

For sensor calibration:

1. Enter the code ##6484##.
2. Select the Touch Screen Test.
3. Follow the instructions on the screen (click on the dots that appear).

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If after the replacement of the touch screen worsened the fingerprint (on Redmi) 4 Pro/Prime), Try to re-register the fingerprints, and sometimes the failure is due to a reset of the sensor.

FAQ: Frequent questions about replacing the touchscreen with Xiaomi Redmi 4