A sudden break in a Xiaomi smartphone is always an unpleasant surprise, especially when you need to capture an important moment. Users often face a situation when a standard application launches a black screen, an error message or the device simply freezes. In most cases, the problem lies not in the physical damage to the matrix, but in the software failure of the MIUI or HyperOS operating system.
Before you bring your gadget to the service center, you should try a series of self-help actions that help restore the module to work in 90% of cases. Software conflicts, overcrowded cache or driver failure are the main culprits of the malfunction. We will analyze all effective methods of diagnosing and eliminating errors, from simple reboots to more complex manipulation of system files.
Here are some detailed instructions to help you bring your device back to life without incurring any financial costs, and it is important to act consistently, checking the outcome after each step, to pinpoint the source of the problem.
Primary diagnostics and basic checks
The very first thing you need to do when you find a malfunction is to reboot the device, and often the RAM is overflowing with background processes, which blocks the app from accessing the camera hardware. 10-15 If that doesn't work, check if the lens is covered with a protective film or a cover, which is especially true for models with protruding modules.
Make sure the device has enough free space. When internal memory is critically filled, the system can block the creation of new files, which is perceived as a broken camera, and it is also worth checking whether the power saving mode is activated, which can force the power-intensive functions to be turned off.
Notice how other apps behave. Try running video in the messenger or opening the scanner. QR-If the image is in third-party software, then the part is good, and the problem lies solely in the software of the regular application.
Cleaning the cache and data of the Camera application
The most common cause of failure is the accumulation of temporary files or damage to the database of application settings. To fix this, you need to clean the cache. Go to the Settings menu → Apps → All applications, find in the Camera list and select Clear. Here it is important not to confuse cleaning the cache with deleting data, although in this case deleting the data is safe - it will only reset the viewfinder to the factory settings.
After this procedure, the system will create new configuration files on the next run, often solving problems with black screen or incorrect switching between lenses, and in some cases, you also need to clean the data of the Media Scanner system service, which is responsible for processing images.
☑️ Data cleanup algorithm
It's worth noting that once you reset the data, you'll have to reconfigure the grid, the timer and the geolocation, but that's a small price to pay for the return of the device's functionality. If the problem persisted because of a conflict of settings, it should now go away.
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If the camera is running after cleaning the data, but the photos are saved again with errors, try changing the format of saving in the settings on JPEG instead of HEIF.
Verification of Resolutions and Systemic Conflicts
Modern versions of MIUI and Android have strict controls on app access to hardware resources. If the Camera app or its associated service is denied access to memory or microphone, it may not behave properly. Go to Privacy Protection → Special Permits and make sure the camera has all the necessary rights.
Often conflict arises with newly installed third-party applications that also use a photo module (such as barcode scanners, video calling apps, or editors). Try to launch your smartphone in Safe Mode. To do this, press the off button and then hold your finger on the “off” icon on the screen for a long time until a suggestion appears to go to Safe Mode.
| Symptoms. | Probable cause | Method of decision |
|---|---|---|
| Black screen at launch | Failure of the driver or cache | Cleaning the application data |
| Self-closure | Lack of RAM | Closing of background applications |
| The “failure to connect” error | Access conflict | Permit verification |
| Blurred image | Dirt on the lens or focus | Brushing the lens |
In Safe Mode, only system applications are running, and if the camera is functioning normally in this mode, then one of the apps you installed is to blame, and remove them one by one to find the culprit.
System updates and reinstall updates
Xiaomi developers regularly release security patches and bug fixes. Sometimes the camera problem is known to the company and has already been fixed in a newer firmware version. Check for updates through the Settings menu → About the phone. If the system suggests upgrading, do so by pre-charging the battery.
What to do if the update is not installed?
The other way around is that the camera stopped working right after the system was upgraded, in which case the new software might contain bugs, check the user forums of your model, and if the problem is massive, you may have to wait for the next patch or roll back to the previous version through Recovery mode, although this requires more technical knowledge.
It’s also worth checking out the updates to the components themselves through Google Play Store or GetApps. Sometimes critical fixes don’t come with an entire shell update, but through updated system apps.
Resetting settings to factory
If none of the above methods worked, the radical but effective method is a complete reset (Hard Reset), which will delete all user data, photos, contacts and applications, returning the phone to the “out of the box” state.
⚠️ Warning: Before performing a reset, make sure the battery is at least 50% charged. Interrupting the reset process due to battery discharge can cause permanent damage to the software and turn the phone into a "brick».
To perform the reset, go to Settings → About Phone → Settings Reset → Erase all data. The process will take a few minutes, after which the phone will restart. In most cases, this eliminates any software errors that interfere with the module.
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A complete reset eliminates 99% of software errors, but requires a mandatory data backup before starting the procedure.
Diagnostics of hardware and repair
When software methods are exhausted and the camera is still not working, there is a high probability of a physical malfunction, which can be a broken plume, damage to the matrix when falling, or failure of the power controller. For initial inspection, you can use the built-in engineering menu.
Open the Phone app and dial ##6484##. From the menu that opens, select Camera. The system will ask you to check the main, wide-angle and front modules, and if you see a black screen when you switch, or if the test ends in an error, it's a hardware problem.
The command to enter the engineering menu:
##6484##
(Trained in standard call)In such cases, self-repair is not recommended, as it requires replacement of components and calibration of focus. It is better to contact an authorized service center, where specialists will conduct an accurate diagnosis and replace the faulty module.