Owners of budget and mid-budget Chinese car radios based on Android often face the same problem: the standard interface does not provide a standard button to completely turn off the display. This creates discomfort, especially at night, when the bright light of the screen interferes with the view of the road or distracts the driver.
Unlike branded head units, where the function Blackout or turning off the screen is placed in a separate menu, in Chinese firmware this option is often hidden, implemented crookedly or absent altogether. However, there are proven methods for solving this problem, from simple settings to the use of third-party software.
In this article we will analyze all the available ways to turn off your screen Head Unitwithout turning off the music and navigation. You will learn how to use hidden engineering menus, which applications to install from Google Play and how to set up automatic dimming depending on the time of day.
Standard methods and hidden system settings
The first step is to check the basic settings of your system, since manufacturers often hide the desired function in non-obvious sections. In most Chinese firmware (for example, based on MCU from Xuanfei or Kaitian), the backlight control is located in the section Factory settings.
To access this section you usually need to enter a password. The most common codes: 8878, 1234, 0000 or 3368. After logging in, look for the tab associated with screen or Light. There may be an option “Turn off screen” or a brightness slider that can be set to zero.
If there is no explicit button in the standard menu, try holding down the source switching button SRC or the Home button for 3-5 seconds. On some models, this works as a combination to put the display into sleep mode. Also check the time settings: sometimes the system automatically turns off the screen at night if the Auto mode is turned on.
⚠️ Attention: Do not change the settings in the “Factory Settings” section if you are not sure of their meaning. Resetting the colors or refresh rate may cause the screen to stop displaying the image at all, and it will be difficult to return the settings back without a full reset.
Please note that the behavior of the buttons may depend on the version. Android. On older versions (4.4–6.0), the operating logic is different from more recent ones (8.1–10.0). If standard methods do not help, proceed to installing specialized software.
Using third-party applications to control the backlight
The most reliable and safest way to solve the problem is to install an application from store Google Play or via APKfile from a flash drive. There are a number of utilities designed specifically for car head units that add a screen off button to the desktop.
One of the most popular solutions is the application Screen Off and Lock or its analogues, such as Power Button to Volume Button. These apps allow you to reassign physical buttons on the steering wheel or radio panel to control the display. For example, you can configure it so that long pressing the “Back” button turns off the screen.
- 📱 Car Launcher Aguri —an alternative shell with a built-in button to turn off the display.
- 🌙 AutoNight —an application for automatically switching the dark theme and reducing brightness.
- 🔘 Button Mapper —allows you to reassign any physical button on the system.
After installing the application, do not forget to add its widget to the home screen or pin it to the quick access panel. This will provide instant access to the dimming function without having to dig through the menu while driving.
Before installing third-party launchers, take a screenshot of your current icon layout. If you don’t like the new application, it will be difficult to return everything as it was from memory.
Some users prefer to use simple screen “dimmers” that do not turn off the matrix completely, but display a black screen with minimal backlighting. This is useful if turning off the screen completely disrupts background navigation processes.
Setting automatic dimming by time of day
Manually turning off the screen can be inconvenient, so it is advisable to set it to automatic mode. Many Chinese radios have a built-in algorithm that responds to time or a signal from a light sensor (if connected).
In the display settings, find the item Day/Night mode. Set the switch to position Auto. After this, you need to set time intervals. Typically, the system allows you to specify the time for turning on the night mode, for example, from 19:00 to 07:00.
However, it is worth considering that the automation does not always work correctly in tunnels or in cloudy weather if the car does not have an external light sensor. In such cases, the brightness may remain high, blinding the driver.
| Parameter | Day mode | Night mode | Auto mode |
|---|---|---|---|
| Brightness | 80-100% | 10-30% | Adjustable sensor |
| Color temperature | Cool white | Warm yellow | Adaptive |
| Contrast | High | Average | Dynamic |
| Activity | Full | Limited | Depends on light |
If your head The unit supports wire connection ILL (sidelight illumination), make sure it is correctly connected to the car wiring. It is this signal that is often the trigger for switching the interface to a dark theme and reducing the brightness.
⚠️ Attention: The interfaces of Chinese firmware may differ even within the same radio model, depending on the batch. If you did not find the described items, the manufacturer may have reduced the functionality in a specific version of the software.
Advanced method: using ADB commands
For experienced users who are not afraid to work with debugging, there is a method to force the screen to turn off via console commands ADB (Android Debug Bridge). This method allows you to control the hardware directly, bypassing interface restrictions.
First you need to enable developer mode. Go to Settings → About device and click 7 times on the item Build number. After the message “You have become a developer” appears, go to the new menu section and activate Settings → About device Build number USB debugging use the application USB Debugging.
Connect a keyboard and mouse to the radio via a USB hub or use the application Terminal Emulatorinstalled directly on your head. Enter the following command to turn off the backlight:
svc power set-screen-power 0To turn the screen back on, change the last digit to one:
svc power set-screen-power 1Risks of using ADB
If you enter incorrect system commands, you can disrupt the operation of Android services. Be extremely careful when copying commands and do not try to change system files without creating a backup copy.
This method is good because the command can be tied to a script or widget, creating your own shutdown button. However, it requires initial setup and the presence of superuser rights (Root) on some firmware for stable operation.
Hardware solution and flashing buttons
If software methods seem too complex or unreliable to you, you can consider a hardware upgrade. Some enthusiasts solder an additional button to the backlight control contacts on the radio board.
A simpler option is to re-flash the buttons on the steering wheel. Using utilities like KeyTest you can determine the code for pressing a free button and reassign it to the “turn off screen” action through system configs. This requires editing the file klayout.xml in the system root.
- 🔌 Connecting a physical button to a contact GND and control pin.
- ⚙️ Editing the keyboard layout in the system partition.
- 🛠 Using macros in applications like Tasker.
Remember that any interference with the hardware will void your warranty. If the radio is new, it is better to limit yourself to software methods or contact the seller's service center.
☑️ Check before modification
Frequent problems and their solutions
Even after successful setup, users may experience that the screen turns on spontaneously or does not respond to commands. This is often due to the operation of background applications, such as a navigator or video recorder, that require constant display of information.
Check the energy saving settings. In section Battery make sure that the system and launcher do not have a restriction on working in the background, which may conflict with screen control. Also disable the “Stay on while charging” feature if it is active.
Sometimes the problem lies in the “glitches” of the touch layer. If the screen goes blank but continues to respond to touches (clicking sounds are heard), try calibrating the sensor through the engineering menu. This will eliminate false positives.
⚠️ Attention: Completely turning off the screen can lead to overheating of the device if heavy applications are running at that moment (navigation, YouTube). The display is partially involved in heat dissipation. Monitor the case temperature.
In rare cases, only resetting to factory settings helps. Before doing this, be sure to save important data, as all user applications and settings will be deleted.
The most stable solution for everyday use is to install a specialized dimming application, rather than trying to hack system files.
Questions and answers (FAQ)
Is it possible to turn off the screen with the power button in Chinese radio?
In 90% of cases, the power button on Chinese devices only works as a “Home” button or calls up a menu to turn off the power of the entire device. There is no separate function for turning off only the screen without flashing it.
Will music play if the screen is turned off?
Yes, the audio system will continue to work as normal. Turning off the display only affects the video output and matrix backlight, without affecting the audio processor and amplifier.
Why does the screen turn on itself again after a few seconds?
This may be caused by a notification (SMS, call, message from the messenger) or the operation of a background navigation service. Check your notification settings and block applications from waking up the screen.
Is it harmful for the matrix to constantly turn off the screen programmatically?
No, turning off the backlight by software is safe for modern IPS and TFT matrices. This even prolongs their life, reducing pixel burnout and heating of the device.
How to return all settings if the screen goes out and does not turn on?
Try to restart the radio using the button RST (usually this is a small hole on the front panel, where you need to press with a paper clip). This will forcefully restart the system and return the brightness to default values.