Owners of the Xiaomi Redmi Note 7 smartphone sometimes face an unexpected situation: after turning on the device instead of the usual desktop MIUI demonstrates a black screen with white text and the FQC logo. This phenomenon often causes panic among inexperienced users who begin to suspect a critical system failure or viral infection. However, it is too early to rush to conclusions about the breakdown, since the FQC Test mode is a regular engineering function built into the firmware for factory quality check.
FQC stands for Final Quality Control, which means final quality control, which is a mode used by engineers on the assembly line to quickly check all the phone modules before packing. Getting into this menu under normal operating conditions is possible, but that doesn't mean your Redmi Note 7 is broken. Most often activation is due to accidental clamping of the key combination or sticking of the volume buttons.
In this article, we will explain in detail why this menu is needed, how to safely exit it, and what diagnostic capabilities it hides. You do not need special programming skills or root rights to deal with this situation, the main thing is to understand the logic of the engineering menu and not press unnecessary buttons without needing.
Reasons for getting a smartphone in FQC mode
There are several scenarios in which the Redmi Note 7 can spontaneously go into testing mode. The most common reason is mechanical impact on the body. If the phone was in a tight case or bag where the volume and power buttons could be pinched simultaneously, the system perceives this as an engineer's command to start Factory Quality Control.
Another reason could be a software failure or a bug in the button drivers. After a failed firmware update or a MIUI failure, the system may misinterpret the state of the keys. It is also worth checking the physical condition of the buttons: if the volume button is stuck inside the case due to moisture or dust, the phone will constantly try to enter diagnostic mode every time it turns on.
⚠️ Note: If your phone is in mode FQC Test immediately after turning on without pressing the buttons, carefully examine the side face of the case.
Some users accidentally activate this mode while trying to log into Recovery or Fastboot. Keyboard combinations for different modes are similar, and one extra moment of holding the buttons can lead to the start of the engineering tester. Understanding the exact sequence of actions will help to avoid this in the future.
Interface and navigation in the test menu
The FQC Test interface on the Xiaomi Redmi Note 7 looks ascetic, displays the logo, test version and the list of available options on a black background, and navigates through physical buttons, not touchscreen, which may be unusual for a modern user. Volume Up and Volume Down buttons are used to navigate menu items.
The Power button selects or confirms the action. In some versions of the test, navigation can be inverted, so it is recommended to carefully check the device's response to the pressing. The screen usually displays a hint which button is responsible for what, such as "Vol Up/Down to select, Power to confirm".
It's important to understand that in this mode, the touch screen is often turned off or in limited mode. Trying to poke the screen will not lead to anything. All control is tied to mechanical switches. If the navigation does not work, perhaps the problem lies in the malfunction of the button plume or their controller.
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Navigation can be slow on the FQC Test menu, pressing volume buttons with short single clicks, pausing between taps so that the system can register input.
The main functions of diagnostics in FQC Test
The FQC menu provides access to deep diagnostics of the Redmi Note 7 hardware components. It's not just a logo screen, it's a full-fledged tool to check the iron's health, and engineers use these tests to make sure the speaker sounds, the camera focuses, and the vibrator responds to commands.
Among the tests available, you can check the display, where the screen is filled with different colors to find broken pixels, you can also check the multi-touch test, which allows you to determine the accuracy of the sensor response, individual points are designed to check the operation of communication modules, GPS, accelerometer and gyroscope, each test requires confirmation of the power button.
- 📱 Display Test: Checking the matrix for defective zones and color distortions.
- 🔊 Audio Test: Checking the main speaker, speaker and microphones.
- 📷 Camera Test: Focus and shutter testing of the main and front cameras.
- 📳 Vibrator Test: Verification of the vibration motor.
Using these features can be useful if you suspect a particular module is malfunctioning, for example, if there is sound in the headphones and there is no audio through the speaker, the Audio test will help to localize the problem, but the average user should be careful: some tests may change the calibration data if they do not know how to finish the procedure correctly.
⚠️ Note: Do not run memory or formatting tests if you are not sure what you are doing, and this may result in loss of user data without the possibility of recovery.
How to exit the FQC Test on Redmi Note 7
The most common question that Xiaomi owners have is how to leave this menu and get back to normal, and in most cases, just find an Exit or Reboot item on the test list. Using volume buttons, go down to the exit point and press the power button to confirm.
If the menu is not responsive or the exit point is missing, you can try a forced reboot, which requires you to press the Power button and hold it for 10-15 seconds, the screen should go out, then the phone will vibrationally announce the start of the boot process. If standard retention does not help, use a combination of buttons.
☑️ The exit algorithm FQC
In the rare cases where a software failure blocks an output, you may need to log in to Recovery mode. To do this, turn off the phone (if it does not turn off, wait for the battery to drain), and then press the Power and Volume Up buttons simultaneously. From the Recovery menu, select Reboot → Reboot to System. This is guaranteed to return the device to normal MIUI mode.
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The fastest way to exit is to search for the "Exit" item in the test menu, and if it is not available, it helps to hold the power button for a long (15 seconds) to force the restart.
Diagnostics of buttons and sensors in the engineering menu
If you're in FQC Test mode because of a suspected button malfunction, this menu is a great tool to check. The Key Test or Button Test section displays the status of each physical key. When you press the volume button or power, the corresponding line on the screen should change color or status.
This allows you to detect a floating contact when the button is triggered again, or a permanent circuit. For the Redmi Note 7, which is no longer a new device, wear of mechanical parts is a common problem. The test will show whether the controller registers the pressing, even if the button appears to be working visually.
Similarly, the touch screen is checked. In Touch Test mode, you need to run your finger over the entire surface of the display. The conduction line should be smooth and continuous. If in certain areas the line is interrupted or twitched, this indicates a problem with the digitizer or protective glass.
| Component | Type of check | Normal reaction. | Sign of malfunction |
|---|---|---|---|
| Power button | Key Test | Change of status upon pressing | No reaction or spontaneous response |
| Loudness | Key Test | Clear response from Up/Down | Sticking, lack of response |
| Screen. | Touch Test | A flat line across the square | Interruptions, dead zones |
| Vibration. | Vibrator | Sensible vibration | Silence or humming without vibration |
Frequently Asked Questions (FAQ)
Is it safe to exit the FQC Test with a power button?
Will my photos and contacts be lost after I leave FQC?
Why does the phone turn on in FQC mode?
Can I remove FQC Test Mode permanently?
What if the buttons don’t work and you can’t get out?
To sum up, the FQC Test on the Redmi Note 7 is a useful tool, not a scary virus. Understanding its purpose and control makes it easy to solve the problem of hanging in this menu. Careful attention to the physical state of the buttons and accuracy in their use will help to avoid a repeat of the situation in the future.