How to change the display on Xiaomi Redmi 9A: full-length instruction

Xiaomi Redmi 9A — One of the most popular budget smartphones, but its display is vulnerable to falls and mechanical damage.Cracks, broken pixels or a broken touchscreen are typical problems that owners face after a crash. 1-2 The service center will charge you for replacing the screen 3 000 before 5 000 RUB, but with the tools and patience you can save money by doing the repair yourself.

This article will take a look at the entire process, from the selection of the original or analog module to the final testing. 9A (model M2006C3LG), So if you've never taken a smartphone apart, start by looking at video reviews of this model's disassembly to see if you can avoid common mistakes, like a plume or a battery break.

Important: the process requires precision and minimal skills in working with small details. If you doubt your abilities, it is better to contact professionals - especially if the phone is still warranty (although Redmi is not a reliable phone). 9A Xiaomi is no longer supported by official warranty).

1. Diagnosis of malfunction: is the display to blame?

Before replacing, make sure that the problem is in the screen module, not in other components.

• 🔍 Cracks or chips on glass – even if the touchscreen works, damaged glass can cut fingers and impair visibility.
• 🖥️ Artifacts in the image: vertical/horizontal stripes, flickering, broken pixels (black or colored dots).
• 👆 Sensor not working: partially (for example, does not respond to touch in one corner) or completely.
• 🔋 The screen does not turn on, but the phone vibrates when charging or calling - this may indicate problems with the motherboard, but more often the display plume is to blame.

If the screen doesn't turn on at all, connect the phone to your computer or charger. If the charging indicator is on and there's no image on the screen, there's a problem in the display or its plume. If the phone doesn't respond to charging and doesn't vibrate, there may be a malfunction in the battery or the board.

⚠️ Note: If the screen flickers green or pink when pressing the glass, this is a sign of detachment of the plume touchscreen - in this case, not only a replacement of the display is required, but also soldering of contacts.

For accurate diagnosis of touch screen, use the service code:

##6484##

In the menu that opens, test the screen's response to touch. If the lines are interrupted or missing, the touchscreen is faulty.

2. Display selection: original vs analog

The quality of the module depends not only on the appearance, but also on the durability of the repair. 9A three options available:

Where to buy:

• 🛒 AliExpress is a great choice, but a long wait (2-4 Look for sellers with higher ratings 98% and photo reviews.
• 🏬 Local stores (like Chip & Deep, Amperka) are faster but more expensive.
• 🔧 Service centers – sometimes sell used displays after replacement.

When choosing, pay attention to:

• 📋 Article: For Redmi 9A The original module has a number T19031-001 or T19031-002 (framed).
• 🔄 Availability of a frame: some modules are sold without it - you will have to carefully remove from the old screen.
• 🔌 Type of plume: Must 30-pin (Redmi 9A just such a connector).

⚠️ Attention: Cheap analogues often come with an already unpatched protective film on the inside of the glass. If it is not, be sure to stick a new one before installation (sold separately), otherwise the screen will "play" when pressed.

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Before you buy, ask the seller to send a video of the display (touch screen and backlight test) to avoid marriage.

3. Tools and training required

To replace the display on Redmi 9A You'll need it:

Screwdriver. T3 and T4 (rear-cover)|Plastic blades or mediators (2-3 piece.)|Screen suction cup (diameter) 5-7 centimeter)|Tweezers with curved ends|Hair dryer or thermo-air station (power) 300-500 Watt)|Double-sided tape or glue B-7000 (plume-fix)|Alcohol and lilac-free wipes (for cleaning contacts)|Antistatic bracelet (optional, but recommended)-->

Preparation of the workplace:

1. Choose a flat surface with good lighting. Paint white cloth or paper, which will help you not lose small details.
2. Turn off the phone and remove it. SIM-card and memory card (if any) you don't need to take out the battery!
3. Discharge the battery before 20-30% — This will reduce the risk of fire during heating.
4. Take a picture of the back cover of the phone – later this will help to place the screws correctly.

Features of Redmi 9A:

• 🔩 The tailgate screws are of different lengths – do not confuse them when assembling!
• 🔥 The display is glued around the perimeter, so you will need heating to 60-80°C for softening glue.
• 🔌 The plume of the display is very fragile - it can not be bent at an angle of more than 90 degrees.

If you do not have a hair dryer, alternative methods can be used:

• 🕯️ Heat on the battery: put the phone on a warm (not hot!) battery 10-15 minute.
• ☀️ Sunlight: Leave your phone in direct light 20-30 Minutes (suitable for warmer seasons).

4. Step-by-step instructions for replacing the display

Follow this algorithm to avoid errors:

Step 1: Removing the back cover

Rotors on the Redmi 9A double-plated:

1. Carefully put the plastic plugs on the connector. USB-C and-tray SIM-map.
2. Twisted 10 screws. T3 (8 perimeter and 2 under stubs. Attention: screws of different lengths - remember the location of the long ones (they are near the camera).
3. Put a plastic blade on the back, starting at the bottom corner, and it's held on clips -- don't put too much effort into it!

Step 2: Shutting off the battery

This is a mandatory step – it prevents short circuit when working with plumes.

1. Unplug the protective film from the battery (it is black).
2. Disconnect the battery connector with a plastic spatula. It's located at the top of the board, next to the camera.

Step 3: Heating and Removing Old Display

Use a dryer at minimum power:

1. Heat the screen around the perimeter during 2-3 minutes, keeping the hair dryer at a distance 5-7 centimeter.
2. Suction the display from the bottom edge (where the connector is) USB-C).
3. Carefully push the plastic blade between the frame and the body, gradually separating the screen. The glue will stretch - take your time!
4. When the display is separated, put it face down. Don't pull the plume!

Step 4: Disconnecting the plume

Display plume at Redmi 9A metal-latch:

1. Then, lift the slat (it is located above the plume connector).
2. Take the plume out with tweezers, don't pull the wires!
3. If the plume is glued, put it on the side with a spatula.

Step 5: Installation of a new display

Before installation:

• Clean the seat from the residues of glue with alcohol.
• Check that the new display has a protective film on the inside (if not, stick it).
• Remove the transport film from the outside of the new screen only after installation!

Next:

1. Connect the new display plume to the circuit board connector, make sure it sits down to the end.
2. Close the metal latch.
3. Apply a thin layer of glue B-7000 perimeter of the body (not on the display!).
4. Carefully apply the new screen, starting at the top, and press it evenly across the area.

Step 6: Build the phone

Repeat the steps in reverse order:

1. Connect the battery connector.
2. Set the back cover by snapping clips around the perimeter.
3. Turn the screws (do not pull!).
4. Put it in. SIM-memory-card.

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Don't turn on the phone right after assembly! 10-15 minutes, otherwise the screen may be behind.

5. Common Mistakes and How to Avoid Them

Even the experienced craftsmen sometimes make mistakes. Here are the most common problems when replacing the Redmi display. 9A and ways to prevent them:

• 🔌 Train damage: Never pull the wires, only take the hard part of the connector. If the plume breaks, it can be replaced separately (stands). ~500 ₽).
• 🔋 Short circuit: always turn off the battery before working with the plumes.
• 📱 Bad screen fixation: If the display is playing when you press it, it's not enough glue.
• 🎨 Artifacts after replacement: if you see a strip or a flicker, check if the plume is tightly stuck in the connector. Sometimes it helps to just tap the screen near the plume.

If the screen is not switched on after replacement:

1. Check the connection of the plume and battery.
2. Connect your phone to charging – if the indicator is on, the problem is in the display or its plume.
3. Try to run your phone in Fastboot (clip the power supply) + If the screen flashes a Mi Bunny, the display works, but there may be problems with the firmware.

⚠️ Note: If after the replacement of the display, the phone stopped seeing SIM-map, check if you have damaged the antenna contacts on the board (they are located next to the connector of the display plume).

6. Testing and calibration of the new display

After assembly, it is necessary to check the performance of all functions:

• 🔍 Visual inspection: Turn on your phone and check if there are broken pixels, stripes or backlights at the edges.
• 👆 Touch Screen Test: Use service code ##6484## or Google Play's Touch Screen Test app.
• 🔊 Sound and vibration: check the speaker and vibrator – sometimes when assembled, their contacts are accidentally touched.
• 📶 Network and Communication: Make sure the phone catches the network and determines SIM-map.

If the touchscreen is not working correctly (for example, touches are recorded with a bias), calibrate:

1. Install the Touchscreen Calibration app.
2. Follow the instructions on the screen – usually you need to click on a few dots.
3. Reboot the phone.

To check the color rendering:

• Open a white background (such as a blank page in your browser) and see if there is any yellowness or other shades.
• Compare colors with another device – if the new screen is too cold/warm, check the color profile settings in Settings → Display. → Color scheme.

If the screen starts to drain the battery quickly after replacement, check:

• Is the Constantly Active Display mode (in the screen settings) turned on?
• Is the plume of the backlight damaged - this can cause increased power consumption.

7. Alternative repair methods

If replacing the display seems too complicated, consider other options:

• 🔧 Replacement of glass separately: if the matrix is intact and only the glass is cracked, you can replace it only. ₽, But the process requires special equipment (laminator) and skills.
• 📱 Buying a used phone: on Avito or Yula you can find Redmi 9A 3,000-4,000 screens ₽ — Sometimes cheaper than repairs.
• 🔄 Trade-in exchange: some stores (for example, Svyaznoy or M. Video) accept old phones for the purchase of new ones, even with a broken screen.

If you have decided to replace the glass separately, consider:

• The process requires a complete disassembly of the display (separation of glass from the matrix using a special liquid and heating).
• Without experience, there is a high risk of damaging the matrix or touch screen.
• After glass replacement, optical defects often remain (for example, iridescent smears in bright light).

For those who want to save money but are not willing to take risks:

• Look for masters on YouDo or Profi.ru – they often offer a replacement display cheaper than in service centers.
• Check reviews and ask for photos of previous works!

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If you sell a phone with a broken screen, indicate in the ad that the display is not working, but the phone is turned on and determined by the computer, which will increase customer confidence.

FAQ: Frequent questions about replacing the Redmi display 9A