Broken screen Redmi Note 12 - one of the most common problems faced by owners of this smartphone. Even a minor crack can eventually turn into a sensor dead zone, and a strong impact can often lead to complete inoperability of the display. In this article we will look at all the nuances of screen replacement: from fault diagnosis to choosing between the original module and analogues, and we will also describe in detail the repair process - both in the service center and with your own hands.
It is important to understand that Redmi Note 12 was produced in several modifications (Note 12 Pro, Note 12 Pro+, Note 12 5G), and the screens for them are not always interchangeable. For example, display module for Note 12 Pro+ with AMOLED matrix not suitable for the basic version with IPS. We will pay attention to these subtleties, and also reveal the secret why the Always-On Display (AOD) function may disappear after replacing the screen and how to avoid it.
How to determine what screen Redmi Note 12 needs replacement
A crack in the glass does not always mean that a complete module replacement is required. Sometimes it is enough to just change safety glass (if the matrix is intact), which costs 3–5 times less. To avoid overpaying, carry out a simple diagnosis:
- 🔍 Visual damage to glass Without disrupting the operation of the sensor, you can get by by replacing the glass.
- 📵 Black screen with backlight on (visible in bright light) - the matrix or cable is damaged.
- 🖱️ "Dead zones" of the sensor or spontaneous clicks - the problem is in the digitizer (touchscreen).
- 🌈 Multi-colored stripes or artifacts — the matrix or graphics chip is damaged.
If the smartphone won't turn on after falling, first check if it responds to charging (vibration, connection sound). The problem may not be with the screen, but with the battery or motherboard. For accurate diagnostics, connect the phone to the computer: if it is detected as a device (for example, in Device Manager), then the screen definitely needs to be replaced.
⚠️ Attention! If after the blow Redmi Note 12 overheats or discharges quickly, do not rush to change the screen. This could be a symptom damage to the power controller on the motherboard. In this case, repairs will cost more.
- Crack without disruption
- Black screen, but the phone works
- The sensor does not work
- Colorful stripes
- Another option
Screen replacement cost: original vs analogues
Screen replacement price Redmi Note 12 varies from 3,000 to 15,000 rubles depending on model, module type and region. Below is a comparative table of costs for different versions of the smartphone (current for 2026):
| Model | Original screen (OEM) | High-quality analogue (A+) | Budget analogue (A-) | Cost of work |
|---|---|---|---|---|
| Redmi Note 12 4G (IPS, 90 Hz) | 6 500–8 000 ₽ | 4 000–5 500 ₽ | 2 500–3 500 ₽ | 1 500–2 500 ₽ |
| Redmi Note 12 5G (AMOLED, 120 Hz) | 9 000–11 000 ₽ | 6 000–7 500 ₽ | 4 000–5 000 ₽ | 2 000–3 000 ₽ |
| Redmi Note 12 Pro (AMOLED, 120 Hz) | 10 000–12 000 ₽ | 7 000–8 500 ₽ | 4 500–6 000 ₽ | 2 500–3 500 ₽ |
| Redmi Note 12 Pro+ (AMOLED, 120 Hz, 2K) | 12 000–15 000 ₽ | 8 000–10 000 ₽ | 5 500–7 000 ₽ | 3 000–4 000 ₽ |
Original screens (OEM) are supplied in original packaging with logo Xiaomi and have a 6 month warranty. Their main advantage is 100% compatibility with function Always-On Display, correct operation of the light sensor and no problems with color calibration. However, their disadvantage is their high price and shortage in some regions.
Class analogs A+ (for example, from BOE or Tianma) are practically not inferior to the original in quality, but may have:
- 🔄 Slightly different viewing angles (especially for IPS matrices).
- 🎨 Shift in color rendering (most often a colder shade).
- ⚡ Increased energy consumption (5–10% higher than the original).
⚠️ Attention! Cheap class screens A- often go without preliminary calibration. This means that after installation you may need to software color profile adjustment through the engineering menu (command *#*#6484#*#*). Without this, the colors will be unrealistic.
Before purchasing a screen, check its part number for compatibility with your model. For example, for Redmi Note 12 Pro+ the original module is marked TDDI-OLED-FHD+-120Hz, and for the basic version - IPS-FHD-90Hz.
Step-by-step instructions for replacing the screen yourself
If you decide to replace the screen yourself, prepare the following tools:
- 🔧 Plastic picks (for disassembling the case).
- 🔥 Hair dryer or hot air station (to soften the glue).
- 🧲 Sucker (to remove the screen).
- ⚡ Screwdriver T3 and T5 (for screws).
- 📏 Double-sided tape or B-7000 glue (to fix the new screen).
The replacement process takes 1.5–2 hours and requires accuracy. Here is a step-by-step algorithm:
- Turn off your phone and remove the SIM card.
- Heat the screen with a hairdryer (temperature 60–70°C) around the perimeter for 3–5 minutes to soften the glue.
- Pry the screen with a plastic pick, starting from the bottom edge (where the charging connector is). Use a suction cup for even lifting.
- Disconnect the cables batteries and screen (they are secured with metal latches).
- Move to new screen speaker, proximity sensor and camera (if they are not included).
- Connect the new module, check the operation of the sensor and matrix before final assembly.
- Apply new glue (For example, B-7000) or double-sided tape and press the screen.
No dust under the screen|Sensor performance in all zones|Correct operation of the light sensor|No artifacts on the matrix (stripes, dead pixels)|Sound from the top speaker-->
The most common mistake when replacing yourself is battery cable damage. It is located next to the screen cable and easily breaks if dismantled carelessly. If this happens, the phone will not turn on and you will need to cable replacement (price - from 1,500 ₽).
What should I do if the screen does not work after replacement?
If the matrix does not light up, but the phone vibrates when turned on, check:
1. The tightness of the screen cable to the connector on the board.
2. Integrity of contacts (sometimes they oxidize - clean with alcohol).
3. Screen compatibility with model (eg Note 12 Pro does not support screens from Note 12 4G).
If the screen works, but the sensor does not, the problem is in the digitizer. Perhaps its cable is damaged or requires calibration via software Mi Flash.
Where is it better to replace the screen: service center vs self-repair
The choice between a service center and do-it-yourself repair depends on your experience and budget. Let's look at the pros and cons of each option:
| Criterion | Service center | Self-replacement |
|---|---|---|
| Cost | More expensive (labor + extra charge for spare parts) | Cheaper (only screen price) |
| Warranty | Yes (from 3 to 12 months) | No (unless original part) |
| Deadlines | 1–3 days (depending on load) | 1–2 hours (if tools are available) |
| Quality | Professional assembly, dust/moisture testing | Risk of errors (damage to loops, leaks) |
| Additional services | Diagnosis of other faults, dust removal | Screen replacement only |
If you choose a service center, give preference official partners Xiaomi or a proven workshop with reviews. Avoid salons where:
- 🚫 They do not provide a guarantee for work.
- 🚫Use screens from unknown brands (for example, NoName from China).
- 🚫 They refuse to show spare parts before installation.
Average cost of service:
- 📱 Screen replacement - 1 500–3 500 ₽.
- 🔧 Glass replacement (if the matrix is intact) - 1 000–2 000 ₽.
- 🔄 Diagnostics + dust cleaning - 500–1 000 ₽.
Official service centers Xiaomi They often refuse to repair phones with non-original screens installed previously. If you plan to sell a smartphone, it is better to immediately install an OEM module.
Typical problems after screen replacement and how to solve them
Even after successfully replacing the screen, owners Redmi Note 12 may encounter unpleasant surprises. Let's look at the most common of them and ways to eliminate them:
1. The sensor or part of the screen does not work
Reasons:
- 🔌 Poor contact of the cable — check whether it is tightly inserted into the connector.
- 🛠️ Damage to the digitizer - if the screen is new, it may be defective.
- 📱 Firmware incompatibility - MIUI update required.
Solution: reconnect the cable, update the software via Settings → About phone → System update. If the problem persists, return to the technician.
2. The screen flickers or changes brightness spontaneously
This is typical for non-original AMOLED matrices. The reason for this is - lack of correct calibration. You can fix it through the engineering menu:
- Enter code
*#*#6484#*#*. - Select
Manual Test → Display. - Calibrate colors and brightness.
3. Always-On Display (AOD) disappeared
This feature only works with original screens Redmi Note 12 Pro/Pro+. If you installed an analogue one, AOD will turn off automatically, as it requires a special controller, which non-original modules do not have. This limitation can only be circumvented by flashing custom software (for example, LineageOS), but this will deprive you of official updates.
4. Phone overheats after replacement
Reasons:
- 🔥 Poor thermal conductivity of the glue - use high-quality B-7000.
- 📉 Increased matrix power consumption - typical for cheap analogues.
Solution: Check the temperature via Settings → Battery. If the temperature exceeds 45°C, contact service.
If, after replacing the screen, “dead pixels” (constantly burning dots) appear, return the module under warranty. This is a manufacturing defect and cannot be fixed programmatically.
How to extend the life of a new screen Redmi Note 12
To avoid repeated replacement, follow these simple rules:
- 🛡️ Use quality safety glass (For example, Spigen Glas.tR EZ Fit or Belkin UltraGlass).
- 📦 Carry your phone in a case with reinforced corners (we recommend Xiaomi Hard Case or Ringke Fusion-X).
- 🚫 Avoid falls on hard surfaces - even with protective glass.
- 🔋 Do not use your phone in extreme temperatures (below -10°C or above +40°C).
- 🧴 Clean your screen regularly soft microfiber cloth (alcohol-free!).
If you frequently drop your phone, consider using insurance for gadgets. For example, in Sberbank or AlfaStrakhovanie can be insured Redmi Note 12 from mechanical damage for 1,500–2,500 RUR per year. It's cheaper than replacing the screen again.
FAQ: Frequently asked questions about screen replacement Redmi Note 12
Is it possible to replace only glass if the matrix is intact?
Yes, but this technically complex process, since the glass is glued to the matrix. Services rarely offer this service (cost starts from RUB 3,000), as there is a high risk of damage to the display. Most often it is easier and cheaper to replace the entire module.
Why doesn't Face Unlock work after replacing the screen?
This happens if during transfer infrared camera (responsible for facial recognition) has been damaged or not connected correctly. Check its location under the top frame of the screen. If the camera is intact, recalibrate Face Unlock in the security settings.
How long does it take to replace a screen in the service?
In most workshops, repairs take 1–2 hours, if the screen is available. If the part needs to be ordered, the period may increase to 2-3 days. In official services Xiaomi sometimes you have to wait up to a week because of the queue.
Is it possible to replace the screen Redmi Note 12 on the screen from another model?
No, it's impossible due to different connectors, sizes and firmware. For example, the screen from Note 12 Pro not suitable for Note 12 4G, even if outwardly they look the same. The only exception is some screens from POCO X5 (based on the same platform), but this also requires a compatibility check.
What should I do if streaks appear after replacing the screen?
Stripes (vertical or horizontal) indicate:
- 🔌 Poor contact of the cable - reconnect it.
- 🖥️ Damage to the matrix - if the stripes are static, the screen is defective.
- 📱 Problems with the graphics chip - motherboard diagnostics required.
If the bars blink when you press the screen, the digitizer cable is most likely damaged.