Replace the screen on Xiaomi Redmi 4: disassemble the smartphone and install a new display

Xiaomi Redmi 4 is one of the most popular budget smartphones of 2016-2017, but even after years of operation, its owners face a serious problem: a broken screen, a fall on asphalt, a hit on a hard surface or a factory defect of the module — and you have a black screen with cracks, artifacts or a broken touchscreen. In the service center, you will ask for a replacement display from 3,000 to 6,000 rubles, but with tools and patience, you can do the procedure yourself.

This article is a step-by-step guide to replacing the screen with Redmi 4 (including Redmi 4 Pro and Redmi modifications). 4X), We'll look at the design nuances, the typical errors and the ways to avoid them, and we'll look at which display to buy, which tools you'll need, and why 90% of the self-replacement failures are due to the battery plumes not being turned off correctly. If you have never disassembled smartphones – no problem: the instruction is adapted for beginners, with a photo of each stage.

Before you start, assess the scale of the problem. If the screen cracks, but the image is displayed and the sensor is working, just replace the glass (but it is more difficult and expensive). If the display does not turn on, flicker or do not respond to touch, you will need a complete replacement module (screen is more expensive). + touchscreen + This article will focus on the second option.

1.What screen to buy for Xiaomi Redmi 4: original vs. analogues

The first and most important step is choosing a new display module, which not only determines the quality of the image, but also the durability of the repair. Three types of screens are suitable for Redmi 4 (codenamed prada):

• 🔹 Original (OEM) — It is taken from other Xiaomi devices or released at the same factory, guarantees 100% compatibility, but is expensive (from 4,500 rubles) and rarely sold.
• 🔹 High quality analogues – manufacturers: JDI, Tianma, BOE. Price 2,000-3,500 rubles, quality is close to the original, but small differences in color reproduction are possible.
• 🔹 The budget analogue is cheap Chinese modules (from 1,200 rubles), often have a dim backlight, a poor viewing angle and quickly fail.

For Redmi. 4 Pro and Redmi. 4X The same modules will fit, but make sure the description is 5.0" HD (1280×720) support 2.5D If the seller offers a screen for Redmi 4A — It's a hoax. 4A size (5") plug-in!

Where to buy? Secure sites:

• 🛒 AliExpress is the cheapest, but deliver 3-4 weeks.
• 🛒 Beru/Yandex Market - Faster (3–7 days, but prices are higher 20–30%.
• 🛒 Local parts stores are expensive, but you can check the screen before buying.

⚠️ Note: If the screen description says "bezel-free" or "touch screen only," it means you'll have to move the old frame from the old display. For beginners, this is extremely difficult - you'd better take the module as a complete unit").

2. Screen replacement tools: what you will need

Without the right tools, it's almost impossible to disassemble the Redmi 4 without damaging the body or plumes.

New display module (check compatibility!)

Screwdriver kit: cross-haired (PH00) flat (1.5 mm)

Plastic blades or mediators (2-3 pieces)

Screen suction cup (∅ 5-7 cm)

Thin-ended tweezers

Dryer or thermo-air station (power 300-500 W)

Double-sided tape or glue B-7000 (plume-fix)

Alcohol and lilaless wipes (for cleaning contacts)

Multimeter (optional, for check of chains)

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Pay special attention to the hair dryer. Cheap household models don't heat up above 200.°C, and to soften the glue under the screen need at least 250-300°C. Alternatively, use a thermoplatform (if you have access to a soldering station) without heating, you risk tearing off the plumes or bend the frame when you try to fit the screen.

Also prepare the workplace:

• 📱 Table with good lighting (better lamp with magnifying glass).
• 🧲 Magnetic mat or screw container – easy to lose!
• 📸 Take a picture of each step of the disassembly – it will help to put the phone back together.

⚠️ Warning: Do not use metal blades to tweak the screen! Even a gentle movement can puncture the battery plume or damage antenna contacts. Plastic or nylon is the only safe option.

3. Step-by-step disassembly of Xiaomi Redmi 4

Now, to the most critical stage, follow the instructions in strict order, and skipping the steps can damage the motherboard.

Step 1 Turn off the phone and remove it. SIM-map.

Turn off Redmi 4, press the power button for 10 seconds to discharge the capacitors. SIM-cards - it will interfere with the dismantling.

Step 2. Heat the screen with a hair dryer.

Turn the dryer on to the maximum temperature (300).°C) and warm up the edge of the screen evenly for 2-3 minutes. Keep the hair dryer 5-7 cm away so as not to melt the plastic.

Step 3. Put a sucker on the screen.

Place the suction cup closer to the bottom edge (where the charging connector is). Pull it up carefully, and it should have a gap of 1-2 mm. Insert a plastic spatula.

Step 4. Disconnect the plumes.

Swipe around the perimeter, separating the screen from the body, and as soon as it rises 5-7 mm, you will see three plumes:

display

touchscreen

proximity-sensor

lastly

Step 5. Turn off the battery.

This is the most critical point: if you don't disconnect the battery before you run the plumes, a short circuit can burn the motherboard, find the battery connector (black, next to the camera) and disconnect it with a plastic blade.

Now you can take the old screen completely off, clean the case of glue residue with alcohol and a lilac-free napkin.

4. Installation of a new screen and assembly of the phone

Before installing a new module, check it for performance:

• 🔍 Connect the plumes to the board (do not fix the latches!).
• 🔋 Connect the battery and turn on the phone.
• 📱 If the screen catches fire and the touchscreen reacts, it's okay. Turn off the phone and continue building.

How to install a new screen:

1. Apply a thin layer of glue B-7000 around the perimeter of the case (or use double-sided scotch if it came complete with a screen).
2. Carefully put the new module in place, combining the holes under the speaker and camera.
3. Press the screen evenly over the entire surface (you can use a heavy book).
4. Connect the plumes in reverse order: first the display, then the touchscreen and the proximity sensor.
5. Close the latches on the connectors.

After assembly, turn on the phone and check:

• 🎨 Color rendering (whether there is yellow or greenish tint).
• ☀️ Brightness and uniformity of lighting (are there any dark spots).
• 👆 Touchscreen reaction all corners.

⚠️ Attention: If the screen doesn't turn on after assembly, but the phone vibrates when you press the buttons -- most likely, the display plume is not connected correctly. Take the phone apart and check the contacts. If there is an image but the touchscreen doesn't work, the problem is the sensor plume or connector on the board.

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If the new screen is dimly illuminated, try turning off Auto Brightness and manually setting the value to 80-90% in the settings, often solving the problem with cheap counterparts.

5. Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when replacing the screen with Redmi 4.

Another common problem is that the touchscreen is broken after replacement.

• 🔌 Badly connected train (check contacts).
• 🔧 Damaged connector on the motherboard (needs a microscope for diagnosis).
• 📱 Incompatible screen (for example, for Redmi) 4A instead of Redmi 4).

If the screen is working after replacing it, but there are “dead zones” (unresponsive areas), try reconnecting the touchscreen plume or updating the phone’s firmware – sometimes this helps.

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90 percent of the problems with screen replacement are due to three things: an undisabled battery, damaged plumes, or an incompatible display module.

6. How much does it cost to replace the screen in the service vs. independently

Prices for replacement screen Xiaomi Redmi 4 service centers vary depending on the region and type of module:

Is it more profitable to repair yourself?

• 💰 You already have tools (dryer, screwdrivers, shoulder blades).
• ⏱️ You are in no hurry and ready to spend 3-4 hours.
• 🔧 You have experience with small electronics (for example, repaired remotes or headphones).

Please contact the service if:

• 📱 Phone warranty (self-repair cancels it).
• ⚡ You’ve never taken your smartphone apart and are afraid of damaging the fee.
• 🔍 You need a 100% guarantee for work (most SCs give 3-6 months).

It is also worth considering the hidden costs of self-repair: if you damage the plume or fee, you will have to buy new parts or carry the phone to the service, where the repair price will increase by 1.5-2 times.

7 What to do if the screen does not work after replacement

Situation: you've assembled a phone, but the screen is not turning on, or you have an image, but the touchscreen is not responding.

1. The screen doesn't turn on at all (black screen, but the phone vibrates):

• 🔌 Check the connection of the display plume. Often it is not fully inserted into the connector.
• 🔋 Make sure the battery is connected and charged (plug in the charge if the phone doesn't turn on).
• 🔍 Check the connector on the motherboard - perhaps the contacts broke off (you need a microscope).

2. Image is available, but touchscreen is not working:

• 🔌 Reconnect the touchscreen plume (sometimes helps to take out and paste back in).
• 📱 Check if the new screen is compatible with your model (e.g. Redmi) 4X Redmi 4 Pro has different tracks!).
• 🔧 Update the firmware – sometimes sensor malfunctions are solved software.

3.The screen flickers or has artifacts:

• 🔌 The display plume may be damaged. Try replacing it separately.
• 🔋 The problem may be in the motherboard (overheated contacts or microcracks).
• 📱 If you used a budget analogue, it could be a factory marriage.

If nothing works and the phone still doesn't work, the motherboard is probably damaged, and in this case, self-repair is almost impossible, you need a soldering station and experience with microelectronics.

FAQ: Frequent questions about changing the screen on Xiaomi Redmi 4