Modern Xiaomi, Redmi and POCO smartphones are equipped with high-quality AMOLED or IPS arrays that provide rich color reproduction. However, users often face the need to change the screen settings, from simple change of wallpaper to deep color refining calibration or a complete replacement of a broken module.
The concept of "change screen" can be interpreted in many ways, such as software setting the resolution and refresh rate in MIUI or HyperOS, resetting color profiles that have gone wrong after the update, or physically replacing broken glass, and it is important to immediately determine whether you are concerned about a software glitch or hardware damage.
If you notice that the colors have become dull, yellow or no longer respond to the touchscreen, panic early. Often the problem is solved by reconfiguring the system or resetting to factory parameters. However, in the case of cracks or black spots on the matrix, you will need to intervene in the hardware of the device.
Software setting of display parameters
The first thing to do before any radical intervention is to check the system settings. Xiaomi offers a wide range of customization options. Go to the Settings menu → Screen. Here you will find a brightness slider that you better not keep at maximum all the time to extend the backlight life.
Focus on the Color Scheme section. The standard feature is "Saturated," "Standard," and "Classic." For accurate color rendering, close to reality, choose Standard. If you want maximum brightness and juiciness to watch a video, Vivid profile is the right fit.
⚠️ Warning: Turning on Read or Vision Protection (blue filter) can greatly distort the colors by turning the image yellow.This is normal for night use, but can be frightening during the day.
Also available in this section is a refresh rate setting: On models that support 90Hz, 120Hz or even 144Hz, you can choose Default (automatic switching to save energy) or Maximum (constant high smoothness), the latter option consumes battery power faster.
Reset and calibrate the screen through the engineering menu
If after updating the firmware or installing third-party launchers, the screen began to behave incorrectly (color inversion, dullness), it may be necessary to reset the display settings. Unlike a complete reset of the phone, this only affects the image output parameters.
Type in the dialer code ##6484## or #4636##. This will open the CIT menu, where you can test the touchscreen, check for broken pixels, and recalibrate. Find Display or Screen.
Inside the tests, there's often a Calibration option or the ability to reset the display data. Be careful: changing the parameters in the engineering menu without understanding can lead to a malfunction of the touch layer. If you're not sure about your actions, you'd better limit yourself to a standard reset via the recovery menu.
What to do if the engineering menu is not opened?
To reset the screen settings without codes, go to Settings → About Phone → MIUI version (click 7 times to activate the developer menu), then in the advanced settings, find the option to reset the preferences of the system applications responsible for the interface.
Replacement of a Broken Screen: Selection of a Module
When it comes to physical replacement, it's important to understand the design of the display. The screen of a modern smartphone is a sandwich consisting of a protective glass (Glass), a touch layer (Digitizer) and the matrix itself (LCD/OLED). 95% of the time when glass breaks, the entire module in the assembly changes.
When you buy parts on AliExpress or in local stores, you'll come across different types of arrays. Original (OEM) is expensive but guarantees quality. Copies are divided into quality classes: Hard OLED (good copy), Soft OLED (medium quality) and In-Cell (cheap LCD that mimics AMOLED).
| Type of matrix | Quality of color reproduction | Touchscreen response | Price. |
|---|---|---|---|
| Original (OEM) | Perfect. | Instant. | Tall. |
| Copy (OLED) | Good. | Fast. | Medium |
| In-Cell (LCD) | Low (pale colors) | There are delays. | Low. |
When selecting a part, be sure to check the compatibility of the connector. Even if the phone model is the same (for example, the Redmi Note 10), different revisions of the board can use different display plumes.
Tools and preparation for repairs
Replacing the screen with Xiaomi is a process that requires precision and special tools. You can't just unscrew the screws because the display is glue-plated, and you'll need a toolbox that you can buy from any radio store or order online.
- 🔧 Set of screwdrivers (including cross and Torx) T5/T6 hull-rotor).
- 🌡️ Thermostol or hair dryer for heating glue (temperature near 80-90 degree).
- 💳 Plastic blades and suction cup for neat opening of the body.
- 🧴 Clay. B-7000 or T-8000 fixing.
Before starting the work, be sure to remove SIM-The card and the device are turned off. Working with the phone on can short circuit and failure of the power controller. 20-25%, Minimize the risk of fire in case of accidental battery damage.
☑️ Preparation for screen replacement
Pay special attention to plumes. They're very thin and easily torn. When disconnecting connectors from the motherboard, use a plastic blade, not metal tools. Metal can damage the tracks on the board, which will lead to expensive repairs.
Replacement process of display module
The process begins with heating the perimeter of the back cover or screen (depending on the design).In most modern Xiaomi (e.g. Mi 11, Redmi Note 11), the back cover is glass and glued. Heat the edges with a hairdryer for 2-3 minutes, then suction the edge and insert the mediator.
Once the lid is removed (or working directly from the front if the body is not disassembled from the back), unscrew all visible screws that attach the display frame. Often the screws are hidden under decorative plugs or the brand logo. Carefully disconnect the touchscreen plume and the arrays from the board.
⚠️ Attention: Don't pull the plumes! They may be further glued to the frame. First, warm up the plume area and gently shovel it with a spatula, or you'll tear the contact group.
Install the new module after checking its performance (plug the plumes without gluing the screen and turn on the phone). If the image is and the touch is working, apply a thin layer of glue B-7000 around the perimeter of the frame and press the module. Lock the device with rubber bands for 1-2 hours until completely dry.
💡
The main secret of a successful replacement is to take your time when unplugging the old screen and carefully clean the frame of the residues of glue before installing a new module.
Typical problems after replacement and their solution
After assembly, you may get nuances. If the screen doesn't turn on, check the density of the connectors. Sometimes you need to press them with force (through the fabric) until you click the characteristic click. If there's an image but there's no touch, maybe the touchscreen plume is damaged or it's not connected well.
The appearance of a yellow spot or uneven illumination often indicates the marriage of the matrix itself or that the plume was squeezed during the assembly. OLED-yellowness on the edges can be a consequence of overheating when uncoupling the old screen, if the temperature of the hair dryer was too high.
If the touchscreen is "glutching" or pressing buttons (ghost touch effect), try calibrating. Type the code ##6484## and select the Touch test. Swipe all the lines. If the lines don't light up or light up themselves, the problem is hardware.