When Xiaomi’s favorite smartphone suddenly stops responding to clicks, it’s always a surprise, especially when the problem is the physical Power button, which is responsible for launching the operating system, and the user is faced with a black screen and a complete lack of response to external influences.
In most cases, it's early to panic, because the electronics of modern Redmi and Poco gadgets are designed with possible hardware failures in mind. There are several proven methods to start the device even with a completely non-functioning mechanical switch.
Before you carry the gadget to the service, you need to rule out software failure or battery discharge. Often the system just hangs in deep sleep, and it requires an external impulse to wake up. Below we will look at all the available ways to resuscitate your device.
Diagnosis and primary actions
The first thing you need to do is make sure that the problem is the button, not the deep battery drain, so if the phone has been idle for days, the lithium-ion battery could go into protection, and in this state, the charging indicator may not light up immediately after the cable is connected.
Leave the device on charge for at least 30-40 minutes, even if the screen remains black. Sometimes it takes the system time to accumulate the minimum charge to start the power controller. Use the original power supply and cable, as third-party accessories may not give enough current to "rock" the battery.
- 🔌 Check the serviceability of the charging cable and power supply on another device.
- ⏳ Leave your phone charging for a long time without trying to turn on.
- 🌡️ Make sure the device is not overheated or in the cold.
If the screen still doesn’t light up after a long charge, try the forced reboot method, which works on most Xiaomi and Redmi models. Press the volume buttons "Up" and "Down" at the same time (if the power button does not work, sometimes it helps to press only the volume "Down" when connecting to the PC). 15-20 seconds.
⚠️ Warning: If the phone is making a vibration sound or you see a logo but the screen is going out, maybe the problem isn't with the button, but with the display plume or the matrix itself.
Using a computer and ADB to run
One of the most effective software ways to enable a smartphone without a physical button is to use debugging. USB. This method will only work if the function was activated in the developer menu earlier. USB-If this option was enabled before it broke, you can send a command to start the system directly from your computer.
To implement this method, you will need a PC with Windows operating system, USB-cable and installed drivers ADB. Connect the phone to your computer. In the Windows command line, you need to enter a special command that emulates the press of the power button at the software level.
adb shell input keyevent 26Keyevent 26 is the standard code for "Power" action. If the drivers are installed correctly and the phone is recognized by the system, the screen must light up. In some cases, you may need to enter an adb reboot command if the device is in bootloader mode.
What if ADB can’t see the phone?
Importantly, this method will not help if the phone is completely discharged or in deep discharge mode, and the method is powerless if the power controller on the board is physically damaged, since in this case the circuit is not formed.
Method of connection to charger
Many users are unaware that modern Xiaomi smartphones have the function of automatically turning on when connected to a power source. However, depending on the version of the MIUI shell or HyperOS, the behavior of the device may differ.
Try connecting your phone to a computer switched off through USB-In some cases, the system reacts to a voltage on the data bus and automatically starts the operating system. If the connection to the PC did not help, try using a powerful charge from another device or Power Bank.
- 🔋 Connect the phone to the computer switched off through USB.
- ⚡ Use a charger with support for fast charging.
- 🔄 Try different ports. USB (2.0 and 3.0) on a computer.
There's also a nuance with Fastboot mode. If you connect to a computer with a down volume button, the phone vibrates and shows the rabbit or android logo, then the volume button works, and you can try to go to the Recovery menu. This often uses a combination of buttons, but if the power button doesn't work, it can be difficult to log in to Recovery.
💡
Connecting to a computer that is turned off often causes the phone to turn on automatically, as an interrupt is triggered. USB-event.
Use of assistant applications
If your phone is still capable of turning on, but the button will crash or run over and over, the best solution is to install specialized software. There are applications that create a virtual on-screen button, which is a temporary solution that will allow you to use the smartphone before repair.
One popular solution is the Assistive Touch app, or Google Play, which adds a floating widget that mimics control buttons, so you can lock and unlock the screen with a touch, without using physical keys.
| Annex | Functional | Requirements |
|---|---|---|
| Assistive Touch | Virtual buttons | Android 5.0+ |
| Button Mapper | Reassignment of buttons | Root-right (often) |
| Volume Power | Volume activation | Specific models |
However, if the phone is already off and not on, you can't install the app, and you can use the "On/Off Planner" feature if you set it up in advance. Go to Settings → Battery → Planner and set the time to turn on. The phone will start at a predetermined time.
⚠️ Warning: Virtual buttons consume extra battery power and take up space on the screen. Use them only as a temporary solution before replacing the plume.
Hardware methods and contact closure
For advanced users who are not afraid to open the case, there is a method of directly closing the contacts on the board, which requires accuracy and understanding of the basics of electronics, the essence of the method is to close the contacts of the switch on the motherboard manually, simulating a press.
First, you need to remove the back cover of the smartphone. In modern Xiaomi models, this often requires heating the edges of the body with a hairdryer and using suction cups. After removing the lid, you need to carefully turn off the battery to avoid short circuits in further manipulation.
☑️ Safe opening of the hull
Find the circuit board where the power button was located, usually two small contacts, and if you use tweezers or a thin metal needle, you just gently close those two contacts for a short time, and that's going to signal to the power controller, and the phone will turn on.
Be very careful not to touch other parts of the board, especially the capacitors and the plumes of the display. One wrong movement can lead to a complete failure of the device. If you are not sure of your abilities, it is better not to take risks and consult a specialist.
Prevention and Configuring Alternatives
To minimize the consequences of a breakage in the future, it is important to properly configure your smartphone. Turn on the Double Tapping function to turn on the screen. It allows you to wake the device with a tap on the display, which reduces the load on the mechanical button.
You can find this option in Settings → Lock screen → Double tap to turn on. It is also useful to activate face unlock or fingerprint to use navigation buttons less often. Always On Display setting will also help you see notifications without turning on the screen.
- 👆 Activate "Double taping" in the screen settings.
- 👤 Set up biometric unlocking (Face) ID finger).
- 🔔 Turn on the notifications display on the screen turned off.
Check the button regularly, if it starts to go down or requires more effort, it is a harbinger of failure. Timely cleaning of the button from dust and pile (compressed air) can prolong its life. Do not let moisture enter the key area.