Why Xiaomi’s phone screen flickers: causes and solutions

When the screen of Xiaomi’s phone flickers, it can irritate even the most calm user. Visual noise, ripples or barely noticeable jitter of the image not only distracts, but also significantly loads the visual apparatus, leading to rapid eye fatigue. Most often the problem lies not in the breakdown of the matrix, but in software conflicts or specific settings of the MIUI system that require adjustment.

But the symptom cannot be ignored, as it is a harbinger of more serious hardware problems with the display module or plume. Understanding the nature of flickering — whether it is a software bug, low refresh rate or physical damage — is the first step to restoring a comfortable smartphone, and in this article we will discuss all possible causes and ways to eliminate them.

It is important to note that modern OLED-screens use technology PWM (PWM) to adjust the brightness, which at low values can be perceived by the eye as flickering, it is not a defect, but a feature of the matrix, but its effect can be minimized. If the ripples appeared suddenly after falling or getting moisture, then the algorithm of actions will be radically different from the program reset settings.

Software failures and MIUI system operation

The most common cause of unstable images is software conflicts inside the operating shell. Android, and specifically MIUI or HyperOS, manages graphics rendering, and failure in this process leads to artifacts. Often the problem occurs after a failed firmware update, when new display drivers conflict with installed applications or the system cache.

In some cases, the culprit is a specific application that incorrectly requests the resources of the graphics accelerator. If the screen only flickers when a certain game or social network is launched, then the problem is localized in the software, not in the hardware.

Also worth paying attention to the animation settings and refresh rates. If the developer menu or standard screen settings are incompatible, the system may not be able to handle frame rendering, especially for high-hertz models such as the Xiaomi 13 Pro or Redmi Note 12 Pro+, where trying to forz 120Hz on all interfaces sometimes causes crashes.

Key factors of program failures:

• 📉 Errors after Android system update or shell MIUI.
• 📉 Conflict of GPU drivers with running applications.
• 📉 Overflowing system cache or damaged temporary storage files.
• 📉 Incorrect update frequency settings in the developer menu.

To eliminate software errors, it is often enough to clear the cache or reset the screen settings to factory values. If the problem persists, a complete data reset or flashing of the device through the computer may be required, which is a more radical but effective method.

PWM technology and low screen brightness

Many users notice that the screen only flickers when the brightness level decreases, a phenomenon directly related to PWM technology, which is used in OLED and AMOLED arrays. Unlike IPS screens, where brightness is regulated by voltage change, in OLED panels, LEDs operate in a pulsed mode: they quickly turn on and off.

The lower you put the brightness slider, the less time LEDs are on. The human eye may not notice these switches at high frequency, but at low PWM frequency (for example, 240 Hz or 480 Hz), sensitive people see ripples or feel discomfort. In smartphones Xiaomi different generations, the frequency of PWM varies, and in budget models it is often lower than in flagships.

⚠️ Attention: Long-term use of a low-frequency PWM smartphone at minimal brightness can cause headaches and eye pain in people with increased senses and vigor.

Modern models like the Xiaomi 14 or Redmi Note 13 Pro have high PWM screens (1920 Hz and above), making flickering almost invisible. However, in devices of the past or budget segment, this effect is more pronounced. Understanding this mechanism is important for diagnosis: if the ripples are only visible in the dark at minimum brightness, the display is likely all right.

To reduce the negative effect, you can use the "Vision Protection" or "Anticress" function, which adds a yellow filter and sometimes changes the algorithm of the backlight operation, and also helps to turn on automatic brightness so that the system itself maintains a level that is comfortable for the current matrix.

Hardware problems: plumes and matrix

If PWM software methods and settings don't help, consider physical damage. Xiaomi's phone screen can flicker due to a breach of contact between the display module and the motherboard. The plume is a thin, flexible conductor that, when it vibrates, falls, or just over time, can move away or oxidize.

Mechanical impact on the body of the smartphone often leads to microcracks in the display itself or the power controller. Even if the glass is intact, the internal structure of the matrix may be disturbed. In such cases, flickering can be accompanied by the appearance of colored stripes, spots or complete extinguishment of the image with light pressure on a certain area.

Particular attention should be paid to models with curved screens, where the plumes are subject to greater tension. In the Mi 11 or Xiaomi 12 series, there have been cases of detachment of the plume due to design features or overheating. If the phone has previously opened to replace the battery or glass, the likelihood of a bad connection of the plume increases many times.

Signs of hardware malfunction:

• 🔌 The flicker is enhanced by bending the body or pressing the frame.
• 🔌 The appearance of horizontal or vertical stripes of different colors.
• 🔌 The screen goes out or lights up chaotically without user action.
• 🔌 The problem occurred immediately after falling or getting water.

If you suspect a hardware failure, self-repair is risky, requires professional diagnostics using a multimeter and test images, and replacing the plume often solves the problem, but if the matrix itself is damaged, you will need a complete replacement of the display module.

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If you suspect a plume is going off, massage the area at the top of the screen or near the camera carefully (without strong pressure) and if the image blinks or changes, contact is broken.

Problems with charging and power supply

Stress instability is another common reason why the screen flickers: If the problem occurs when the charger is connected, it's the power supply or the cable, and cheap charging can't provide a steady current, which causes voltage surges that affect the backlighting of the display.

In addition, a faulty battery can also produce current drawdowns, especially if the battery is worn out and its residual capacity is low.The smartphone's protection system can limit the power supply to the screen, causing it to pulsate. This is often seen on older devices where the battery life is running out.

Using unoriginal accessories that do not support Quick Charge or Power Delivery fast charging protocols can lead to conflicts in the power chain. The charge controller tries to agree on parameters, at which point the screen can behave unpredictable.

For diagnosis, try charging your phone from another source, such as a computer port or power bank. If the flicker has disappeared, then the problem is exactly in your charger kit. Don't ignore this symptom, as power surges can damage other components of the smartphone.

Frequency settings for refresh and energy saving

Modern Xiaomi smartphones are equipped with screens with variable refresh rates (90 Hz, 120 Hz and above). Sometimes the system incorrectly switches between modes in an attempt to save energy, which is visually perceived as a flicker or twitch of the picture, this is especially noticeable when you scroll through social media feeds or when you are static.

Power saving mode can also aggressively limit the display. To extend the battery life, the system reduces frame rate and brightness, which in some models leads to visible pulsation. Turning off the energy saving mode often returns the stability of the screen.

In Settings → Screen → Update frequency is worth experimenting with settings. Try fixing a standard 60Hz frequency. If the flicker is gone, then the problem is optimizing the high hertz for a particular application or system. In some cases, resetting the screen settings through the engineering menu helps.

⚠️ Warning: Forced activation of the maximum refresh rate for all applications can cause the processor to overheat and accelerate battery discharge.

It’s also worth checking whether Dark Mode or color inversion is enabled in special features, and sometimes the conflict between the system theme and the theme of a particular application causes the screen to blink briefly when switching between windows.

Diagnostics and testing of the display

Before you carry your phone for repair, do a self-diagnosis. Xiaomi smartphones have built-in engineering menus that allow you to check the health of all components, including the display.

Enter the command.

##6484##

Look closely at the image in each color, look for uneven lights, spots, stripes or areas where flickering is increased, if there are ripples on a monochromatic background (especially gray or black) that do not disappear after rebooting, this is a sure sign of a matrix defect.

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If the test colors are displayed exactly, but the system screen flickers — software problem. If the artifacts are visible on the test — hardware problem.

You can also use third-party apps from Google Play that display gradients and check for broken pixels, but Xiaomi’s built-in test is the most reliable tool for initial assessment of the state of the hardware.

Methods for eliminating flickering

Once the diagnosis is complete, you can move on to fix the problem, you can break it down into software and hardware, you can always start with the least invasive things, and the first step is to start with a simple reboot, followed by cleaning the cache and removing the newly installed applications.

If that doesn’t work, try resetting your screen or doing a full reset to the factory settings (Hard Reset).Be sure to back up your data before reset, as all files will be deleted. This will eliminate the impact of system debris and software conflicts.

If the software is powerless, it's repairable, and it's inexpensive and quick to replace the plume, and it's more expensive to replace the display, especially for the models with the same system. OLED-If the phone is warranty, don't open it yourself, so you don't lose your right to free repair.

Algorithm of actions in flickering:

• 🛠 Restart the device and check for system updates.
• 🛠 Turn off energy saving mode and auto-brightness.
• 🛠 Run the screen test through the engineering menu CIT.
• 🛠 Contact an authorized service when confirming a hardware problem.

FAQ: Frequently Asked Questions