The Xiaomi Redmi 8, released in 2019, is still a popular budget smartphone due to its robust “stuffing” and maintainability. However, the display is one of the most vulnerable places: falls, bumps or even prolonged use can lead to cracks, broken pixels or a broken sensor. If you encounter such a problem, do not rush to bring the phone into service: you can replace the screen on the Redmi 8 yourself, saving up to 70% of the cost of repair.
In this article, we will look at the whole process from A to Z: how to choose a quality display module, what tools you will need, how to carefully disassemble your smartphone and avoid typical errors. Particular attention will be paid to the nuances that are often missed in standard instructions, such as checking the originality of the plumes or calibrating the sensor after replacing. Even if you have never repaired the equipment, following our recommendations, you will cope in 1-1.5 hours.
We warn you right away: the procedure requires patience and accuracy. One wrong move can damage the flexible plumes or the motherboard. But don't worry, we've detailed each step and added unique tips for diagnosing after replacement that are not found in other guides, such as how to distinguish a display problem from a graphics chip malfunction.
1. Diagnosis of malfunction: is the display to blame?
Before you order a new screen, make sure that the problem is in it.
- 🔹 Cracks or broken glass is the most obvious sign, but even here, there's a caveat: if the glass is cracked, but the image is displayed normally, you can do with replacing only the glass (it's cheaper by 30 to 40%).
- 🔹 White screen or "snow" when turned on - often indicates damage to the plume or display contacts.
- 🔹 The sensor is not working (partially or completely) – it may be the fault of both the display itself and the controller on the motherboard.
- 🔹 Image artifacts: stripes, flickering, broken pixels are usually a problem in a matrix or graphics chip.
To rule out a board malfunction, connect your smartphone to your computer or TV via a USB-C → HDMI adapter. If the external screen is normal and the phone is not, the display module is to blame. If the artifacts remain, the problem is deeper (possibly in the Adreno 506 GPU).
⚠️ Warning: If the phone doesn't turn on after a fall (no vibration, no charging indication), don't be quick to blame the display. First check the battery and power contacts - the battery connector may have left the battery.
Another test is to call your smartphone, and if it vibrates or makes sounds, but the screen is black, it confirms that the display or its plume is not functioning, and if there is no response, it could be the circuit board or the battery.
2. Selection of display module: original vs. copy
The quality of the new screen is not only the picture, but also the life of the smartphone. For the Redmi 8, three types of modules are available:
| Type of module | Price (2026) | Pluses | Cons |
|---|---|---|---|
| Original (OEM) | 3 500–5 000 ₽ | Perfect color reproduction, full compatibility, long service life | Expensive, hard to find in stock |
| Quality copy (A+) | 1 800–2 500 ₽ | Good color reproduction, often with original plumes | Maybe a little more dim than the original. |
| Budget copy (A- or B) | 1 000–1 500 ₽ | Low price, quick delivery | Poor color reproduction, possible broken pixels, short service life |
Our advice is that the best option is a class A+ module. It is 30-40% cheaper than the original, but it is almost as good as the quality. The main thing is to check for the original plume (it should be flexible, with clear markings). Cheap copies are often equipped with Chinese plumes that break down after 2-3 months.
Where to buy:
- 🛒 AliExpress is cheaper, but it's a long wait. Look for sellers with a rating above 98% and reviews with photos.
- 🛒 Local parts stores (for example, FixPrice, RepairTechno) are more expensive, but you can check before buying.
- 🛒 Avito/Yula - risk of running into a used module!
⚠️ Note: In the description of the module should be specified For Xiaomi Redmi 8 M1908C3JG (If a vendor says "fits all Redmis" that's a hoax. Redmi 8 has a unique display connector! 📊 Which display will you choose to replace (OEM)Quality copy (A)+)Budget copy (A-) Not yet solved 3. Tools: What to buy in advance To replace the display with Redmi 8 will need a minimum set of tools. Don't skimp on quality - cheap plastic blades break and scratch the body. 🔧 Screwdriver kit: cross-haired PH00 (for the screws of the shell), flat 1.5 mm (for tweaking clips). 🔧 Plastic blades / mediators - 2-3 pieces of different thickness (for separation of the display). 🔧 Suction - helps to pick up the screen after heating. 🔧 Dryer or thermo-air station - for softening the glue (temperature 60-80)°C). 🔧 Tweezers – to work with small details. 🔧 Double-sided tape or glue B-7000 — fixing. 🔧 Antistatic bracelet (optional) - protects the board from static electricity. The cost of a full set is about 1,000-1 500 ₽. If you do not plan to repair constantly, you can rent tools (many service centers rent them for 200-300). ₽ day-to-day). ⚠️ Warning: Never use metal blades or knives to separate the display! They will damage the plumes and can close contacts on the board. Only plastic or special mediators. Also prepare the workplace: a clean table, good lighting and a screw container (so as not to lose small details) It is advisable to work on an antistatic mat or at least on a wooden surface (not on metal!). ☑️ Preparation for replacement of the display Buy display module Prepare tools Charge the phone on 50%Make a backup of data Clear the workplace Completed: 0 / 5 4. Step-by-step: Disassembly and replacement of the display Now let's get to the most important stage. Follow the instructions carefully - every step is important! 1: Turn off and prepare your phone completely turn off Redmi 8 (clamp down on power. + Volume up on 10 - if you don't respond to the button. SIM-card and memory card - they can interfere with disassembly. 60–70°C, no higher!) This will soften the glue and the lid will be removed easier. Keep the hair dryer at a distance. 5–7 - Not to overheat the battery. 2: Removing the back cover Insert the plastic blade into the gap between the cover and the case (start with the lower right corner where the SIMKA is located). Carefully drive the blade around the perimeter, separating the clips. Do not force — if the lid does not respond, warm up the problem again. Once the lid is removed, you will see the battery, motherboard and camera. Do not touch the boards with your hands — static electricity can damage the chip. Step 3: Disconnect the battery connector (it is in the bottom of the board, next to the vibrator). Use the plastic blade to gently lift the connector. This is a mandatory step — if you do not turn off the power from the top part, you can pay the chipboard with a 4°. It's fixed by a latch -- you need to gently lift it with a spatula or tweezers -- the plume is very fragile, so be careful! Once the plume is unplugged, you can start removing the old display. It's glued around the perimeter, so use the hairdryer again (heat the front of the phone). Then grab the screen with a suction cup and gently pull it up. If the display doesn't lend itself, warm it up again. Step 5: Install a new display Before installing the new module, clean the phone's frame of the residue of the old glue (use alcohol or a special cleaner). Apply a thin layer of glue. B-7000 Or double-sided tape around the frame, carefully stow the new display, align the connectors. Press it evenly over the entire area (you can use a heavy book), then plug the plume into the board and lock it with a latch. Step 6: Build the phone Collect the phone in reverse order: Connect the battery. Set the back cover (clips should click). Twisted the screws (don't pull!). After assembly, don't turn the phone on immediately - let the glue grab (10-15 minutes). 💡The riskiest step is to disconnect the display plume. If you damage it, you'll have to buy a new module. Act carefully and without haste! 5. Check and calibrate after replacement, check the display's performance and calibrate if necessary. Display Testing Turn on the Phone and Check: 🔍 Image: Are there no broken pixels, stripes or flickering. 🔍 Sensor: Does it respond to touches all over the screen (use the Play Market’s Touch Screen Test app). 🔍 Colors: Compare with another device - are not too dull or saturated. 🔍 Brightness: Check at maximum and minimum levels. If the sensor is not working properly (e.g., touches are offset), calibration is required. Sensor calibration On Redmi 8 is done via the engineering menu: Open the Phone app and dial ###6484##. Select Touch Panel Test → Calibration. Follow the on-screen instructions (usually click on the dots that appear). If the engineering menu doesn't open, use the Touchscreen Calibration app from the Play Market. What if the screen doesn't work? If the display doesn't turn on or malfunctions after you replace it, check: 🔌 Connecting the plume: it may not be fully inserted into the connector. 🔌 The integrity of the plume: whether it has cracks or tears. 🔌 Contacts on the board: sometimes they are oxidized - clean with alcohol. 🔌 Module compatibility: if you bought a non-original display, it may not be supported by firmware. ⚠️ Warning: If the phone overheats or discharges quickly after the display is replaced, it is likely that the thermal paste on the processor has been damaged. 💡If after replacing the display appeared "yellow" shades on a white background, check the color settings in Settings → Screen. → Color mode. Maybe Warm or Read mode is on. 6. Typical errors and how to avoid them Even experienced masters sometimes make mistakes when replacing the display. We've collected the most common ones and tell you how to prevent them. Error Consequences How to avoid Using metal tools Scratches on the body, damage to plumes, circuit boards Work only with plastic blades and mediators Overheating by a hairdryer Deformation of plastic, battery damage Keep a hairdryer at a distance of 5-7 cm, temperature not higher than 80°C Undisconnected battery Short circuit, failure of the board Always disconnect the battery before working with the plumes Too strong pressing on the display of cracks on new glass, damage to the matrix Press the screen evenly, without excessive pressure Another common problem is incompatibility For example, if you installed a Redmi display. 8A (It's the same, the sensor may not work. Always check the labeling of the module before you buy it! If the display flickers or turns off spontaneously after the replacement, the cause may be a faulty graphics chip (especially if the phone fell from a height). In this case, replacing the display will not help - you need a card diagnosis. What to do if the new display does not turn on?First check the connection of the plume. If all is well, try to connect the old display - if it works, the problem is in the new module (marriage or incompatibility). If not, maybe damaged the fee during the dismantling. 7. Parameter Self-service center Display cost (A)+) 1 800–2 500 ₽ 2 500–3 500 ₽ (30–50%) Tools 1000–1,500 ₽ (Once) Included in the cost of repair Work of the master 0 ₽ 1 500–2 500 ₽ Warranty Depends on the store (usually 1-3 months per module) 3-12 months for work and spare parts Total 2 800-4 000 ₽ 4 000–6 000 ₽ The benefits of self-repair are obvious: savings of up to 3,000 ₽. However, consider the risks: 💥 Damage to the board or plumes (if no experience). 💥 No guarantee of work (only for spare parts). 💥 Time wasted (1-2 hours vs. 30 minutes in service) Our verdict: if you are careful and willing to follow the instructions carefully, a self-substitution is warranted. If in doubt, it is better to contact the service, especially if the phone is warranty (although after self-repair it will most likely burn). 8. Alternative solutions: when you don't need to replace the display, it's not always a broken display that needs to be completely replaced. In some cases, you can do with a cheaper or temporary solution. 🔧 Glass replacement (if the matrix is intact): If only the glass is cracked and the image and sensor are working, you can only replace it. Cost: 800-1 500 ₽ (2,500 ₽ Minus: complex process (you need to separate the glass from the matrix without damage). 🔧 Oleofobic-coated film or glass: If the cracks are small and do not interfere, you can stick a protective glass (200-500) ₽). This will not solve the problem, but it will protect you from further damage. 🔧 Connection to an external monitor: If the display is not working, but the phone is working, you can use it through the phone. USB-C → HDMI Adapter (connect to a TV or monitor). 🔧 Sale of spare parts: If repairs are unjustifiably expensive (for example, the fee is damaged), you can sell the phone for spare parts (on Avito, such lots are bought for 1,000–2,000 dollars). ₽). If you're going to replace only glass, consider that the process requires special equipment (laminator for gluing glass to the matrix) and experience. Without it, there is a high risk of damage to the matrix, and then you still have to buy a full module. For a temporary solution (for example, if you need to urgently copy data), you can connect the phone to the PC through the ADB Adb devices adb shell input tap x y # where x and y are the touch coordinates But this is difficult for beginners, so you'd better use an external monitor. 💡If cracks on the display do not interfere with the work, and the budget is limited, a temporary solution (protection glass) + Selling “as is” may be more profitable than replacing it completely. FAQ: Frequent questions about replacing the Redmi display 8 Can I replace the display with a Redmi? 8 No hair dryer? Theoretically, yes, but it's going to make it very difficult. The glue on which the display is held will not soften without heating, and you risk damaging the plumes or the body. The alternative is to use isopropyl alcohol (apply around the perimeter and wait). 5–10 If you don't have a hair dryer, you should go to the service. How long does it take to replace the display? If you have experience — 30–40 If you're doing this for the first time, lay it down. 1.5–2 Take your time, especially when the plumes are disconnected! What if the camera doesn't work after the display is replaced? You probably forgot to plug in the camera plume or damaged it when you disassemble it. Disassemble the phone and check the connection of the camera connector (it is next to the display plume). If the sleeve is damaged, it will have to be replaced (cost — 300–500 ₽). Can I use the Redmi display? 8A for Redmi 8? No, despite the look and feel, these models have different display modules. 8 permit 720×1520 And the other plume connector. 8A, It's either not going to work or it's going to show the image incorrectly. How do I check if the original display was sold to me? The original module has: Clear Xiaomi markings and model number on the plume. Smooth edges of glass without barbs. Oleophobic coating (water droplets don't spread). Bright and rich colors in testing. If the seller refuses to show the module before buying, this is a reason to be wary.