Modern Xiaomi and Redmi smartphones are equipped with high-quality OLED and IPS arrays, but even flagship models are not immune to software failures or mechanical damage. The appearance of a white stripe, horizontal line or artifacts at the bottom of the display often causes panic among owners, as this can signal a serious hardware problem.
Before carrying a device for repair, you need to conduct a thorough diagnosis to exclude software errors of the operating system MIUI or HyperOS. Often users confuse the software bug interface with physical damage to the plume or matrix itself. In this article, we will discuss in detail all possible causes of the defect and offer a step-by-step algorithm for correcting the problem, ranging from simple settings to complex engineering tests.
It's worth noting that statistics show that about 30 percent of all complaints about broken screens are solved by software or system reboots. Don't rush to disassemble the device until you've tried all the software solutions available. Ignoring the problem early can lead to a widening of the damaged area or a complete failure of the display, so you need to act quickly and consistently.
The main reasons for the appearance of artifacts on the display
Understanding the nature of the defect is key to solving the problem successfully. The white bar at the bottom of the screen can be caused by a variety of factors, from a simple sticking button to a serious impact. Most often, the reason lies in the violation of the contact between the display plume and the motherboard. Even a microscopic shift of the connector after a fall, which does not appear on the body, can cause artifacts to appear.
The second common cause is a software failure of display drivers. Android operating system in conjunction with the MIUI shell controls the supply of voltage to pixels. If the system has accumulated a cache of errors or a conflict after the update, the display controller may not correctly form the image. Software glitches often occur after installing informal firmware or applications that require deep access rights.
⚠️ Note: If the white stripe appears immediately after a heavy impact, falling from a height or getting moisture, the probability of hardware damage is more than 90.
The temperature factor is also important, because when the processor or battery overheats, the materials inside the smartphone expand, which can lead to a temporary disruption of contact in the plume. If the band only appears during games or charging and disappears after cooling, the problem may lie in the thermal expansion of the components.
📊 How often do you have a white stripe?
Only after inclusion
Constantly.
Periodically under heating
Only in certain applications
Programming methods for eliminating defects
The first step in the fight against artifacts should be software diagnostics. There are several proven methods to reset the video output settings without losing personal data. Start with a banal but effective reboot. Xiaomi devices often accumulate temporary files that interfere with the correct operation of drivers.
A deeper method is to use the engineering menu, and by entering a special code in the Phone app, you will be taken to the diagnostics section where you can run matrix tests. For most models, the code ##6484## is relevant. In the CIT menu that opens, you need to select the item associated with the display (usually "Display" or "Color"), and carefully examine the screen for defects in different colors.
If tests show that the pixels are physically working but the band is still in the system, try resetting the screen settings. Go to Settings → Screen → Colors and contrast and try changing the color scheme or reading mode. Sometimes switching from Standard to Saturated and back causes the controller to recalibrate the voltages.
In cases where the problem is caused by a third-party application, starting in safe mode will help. To do this, press the turn off button, and then press and hold the "Stop" option on the screen until the suggestion appears to go to safe mode. If in this mode the white bar has disappeared, then one of the applications you installed is most likely to be responsible for the theme of the design or brightness control.
The secret calibration method through ADB
For advanced users, it is possible to reset the display settings via USB debugging. If the phone is connected to a PC, you can enter an adb shell wm density reset command that will reset the pixel density to factory values. This can help if the band is caused by a change in the DPI settings of the developer. Diagnostics of hardware problems and plumes If the software methods did not work, you will have to consider the hardware part. The most common reason for the appearance of the white stripe at the bottom of the display is the departure of the connector on the board. In modern smartphone, you can even use a small supper supperboard s to check the lides. The vertical white bar is more likely to indicate damage to the matrix glass itself or the controller inside the display. The horizontal bar, especially if it flashes or changes color when pressed, almost always indicates a problem of contact of the plume. If the strip disappears or changes intensity, then the contact is there, but it is unstable. The type of defect is likely to cause the difficulty of repair The probability of success of the horizontal flashing stripe has gone away from the medium High Statical White Line Damage Matrix High (below the stre), and the corrective method of using the heat-free sensor (low) Then heat the device (e.g., turn on 4K video for 10 minutes). Changing the nature of the band when the temperature changes confirms the hardware nature of the malfunction related to the physical properties of the materials. Physical and warming methods There is a controversial but often working method of restoring the contact of the plume by warming up. The essence of the method is that when heated, the adhesive base of the plume and the contacts can expand and recover slightly. However, this method requires extreme caution. Warming only helps in cases of contact oxidation or micro-washing, but is powerless against broken tracks. Then, protecting the remaining components with a thermal scotch, carefully warm up the connection area of the display plume to a temperature of about 80-90 After warming up, you need to press the connector tightly and let the device cool under load (you can put something heavy, but not on the screen itself). ⚠️ Warning: Overheating can permanently kill the battery or melt plastic body elements.Do not use an open fire or heat the phone for longer 2-3 Minutes at a time. Temperatures are higher. 100 degree OLED-The alternative to warming up is pressure, and once you've disassembled the phone, you put a little piece of foam or folded paper in the plume and the board to put it together to create constant pressure on the contact when you build it. This is often used in service centers as a temporary solution when replacing the display is impossible or not feasible at the cost, and it is worth remembering that any physical interventions deprive you of warranty. If the Xiaomi smartphone is on warranty service, do not try to warm or disassemble it yourself.It is better to contact an authorized center, where the defect is recognized as a production defect, if there are no traces of impacts on the case. 💡Physical methods (warming up, pressure) are a temporary solution with the risk of permanent failure, and are only suitable for older devices where replacing the screen is not economically feasible. When all diagnostic methods are exhausted, there is a radical software step – a complete reset (Wipe Data) – which will delete all your files, contacts and applications, returning the phone to a factory state. If the white bar is caused by deep conflict of system files or malware, the reset should help. You can reset through the Recovery Mode menu. To enter it, turn off the phone and press the power and volume buttons at the same time. Select the language (usually English) from the menu, then go to Wipe Data. → Wipe All Data. Confirm the action and wait until the process is complete. Once the reboot is complete, the system will be clean: 1. Turn off the device. 2. Hold the Power. + Volume Up. 3. Wait for the logo to appear Mi/Redmi. 4. Select Wipe Data -> Wipe All Data. 5. Confirm and wait for the reboot. If even after a clean reset and without installing any applications, the band is left, it's reinforced concrete proof of hardware malfunction. No further manipulation of the software, including the Fastboot, will result. In this case, the hardware failure is 100% confirmed. Before reset, make sure to back up the data to the Mi Cloud cloud or to the computer. Also make sure that the battery is over 50% so that the phone doesn’t turn off during the cleaning process, which can lead to boot errors. Unfortunately, in most cases, a stable white stripe, especially if it appeared after a fall, indicates the need to replace the display module. + touch-slip + frames, and replacing individual components at home is almost impossible without special equipment: 🔴 The band expands or new lines appear over time. 🔴 On the screen there are black spots ("ink") that grow. 🔴 The touchscreen in or near the strip has ceased to respond to touch. 🔴 The strip is visible even on the bootloader screensaver (the Mi logo), which excludes the influence of Android. Replacing the display is a technically complex procedure that requires heating the case, neat detaching of the plumes and high-quality sealing of the new module. Using non-original copies of screens can lead to a decrease in brightness, color distortion and rapid battery discharge. OEM. ⚠️ Note: After replacing the display on modern Xiaomi models (especially flagships), you may need to flash the screen calibration data through engineering software. If you don’t have the electronics repair skills, self-replacement can damage other components, such as the power button plume or battery. In such cases, the savings on repairs can come out sideways, turning a simple screen repair into the restoration of a burned motherboard. Should you change the screen yourself? IPS-It's a little bit cheaper than a little bit of a screen. AMOLED The risk of damage to the new screen with a careless installation is up to 40%. Prevention and protection of the screen To minimize the risk of artifacts in the future, you should follow the rules of operation of the smartphone. Don't leave it in the sun, don't play heavy games while charging. Overheating is the main enemy of the adhesive base of the plumes and the matrix itself. Using high-quality protective glass and a case with raised sides can save the screen from point bumps when falling. Even if the glass breaks, it will take on the impact energy, keeping the matrix intact. Also try not to press the screen in your pocket and put heavy objects on the phone. Regularly update the software. Xiaomi engineers constantly release patches that improve the operation of the display drivers and power consumption. The current version of MIUI or HyperOS can contain bug fixes that prevent software failures of the display driver. Can you put heavy objects on the phone, if the software is completely damaged by the white strip only if the software is completely removed for the defect, or the software is not removed for the white stripe? How much does it cost to replace a screen on Xiaomi? The cost depends on the model. For budget Redmis, it can be 30-40% of the price of the phone, for flagship Mi/Mix — up to 60-70%. Using a copy screen reduces the price, but worsens the quality of the picture. Does the white stripe affect the operation of the touch screen? Often, yes. Touch screen and matrix are in close proximity. Damage that caused the stripe can affect the sensor, making part of the screen insensitive to touch. Is the white stripe warranty case? If the defect occurs in the device, try to get rid of the device, if the lane, if you get rid of the lane, or if you are in the lane, if you get rid of the product, if you, you, you are in the lane, if you are in the lane, if you, if you are in the lane, you are in the lane, you are in the first case of the defect, if you, you are in the first time, you, you, if you get rid of the device, if you, if you, if you are in the If it does not help, the problem could simply coincide with the update and is hardware in nature.