When your Xiaomi Redmi Note 4 refuses to start because of a faulty physical button, it can take you by surprise.This is a common problem that smartphone owners face after a certain period of active use. Mechanical wear of the plume or sticking of contacts often causes the device to stop responding to presses.
However, not responding to a button doesn’t mean that the gadget is broken. There are proven ways to activate the Android system using program commands, a computer connection, or specific combinations of actions. In this article, we will discuss in detail the algorithms of actions for different scenarios.
You don't have to bring the device to a service center right away, where you need to replace the module. USB-The volume button cable allows you to start your smartphone and save important data. We will look at both software methods and temporary hardware solutions for emergency launch.
Software Enablement via ADB and Fastboot
The most reliable way to run Redmi Note 4 without using a physical Power button is to use the debugging interface. ADB (Android Debug Bridge: This method requires a computer with a Windows, macOS or Linux operating system, and a working computer. USB-The method is to send the system command to launch directly from an external device.
First, you need to connect the smartphone to your computer, and in some cases, if the battery is completely dead, the device can automatically go into charging or recovery mode when the power is connected. If the screen remains black, try pressing the volume button before connecting the cable to the PC to initiate the transition to Fastboot mode.
How to check if an ADB is installed?
Once connected, open the command line on your computer and enter a command to check the connection. If the device is determined, you will see the serial number. Next, you should enter the adb reboot command, which will force you to restart the system. If the smartphone is in Fastboot mode, use the fastboot reboot command to exit this mode and turn on normally.
Using Recovery Mode to Start Up
The built-in Recovery menu in the MIUI shell often allows you to reanimate the device even if the main button is not working. This mode has a lower priority for iron management than the operating system itself, so the response from the volume buttons here can be better. You can get into this menu by connecting the phone to the charger and simultaneously holding the volume button.
When the Mi logo or a multi-point menu appears on the screen, release the button. Navigation on this menu is done with volume buttons, and the choice is made with a short press of the same button (if it works) or, in rare cases, a touchscreen. You need to select Reboot and then Reboot to System.
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If the touchscreen in Recovery mode does not respond, and the selection button does not work, try to connect USB-keyboard OTG-Adapter: In some versions of Recovery, navigation is possible with arrows on the keyboard, and the choice is made by the Enter key.
It's important to understand that this method only works if the volume button is working. If the entire button plume is damaged, it will be useless. It's also worth noting that logging into Recovery sometimes requires confirmation by actions on the screen, which can be difficult with a fully black display until the menu appears.
Method of connecting to PC and charger
There is a nuance in the behavior of the Xiaomi Redmi Note 4 power controller, which allows you to use external energy sources to wake up. USB-The port often causes a current interruption, which may be perceived by the system as a signal to turn on, especially if a certain sequence of actions has been previously performed.
Try this algorithm: plug the phone into the computer that's turned off, then turn on the PC. USB-The smartphone port can vibrate or show a logo. If this happens, quickly turn off the cable and reconnect it to a regular outlet so that the device does not go into charging mode, but continues to load.
- 🔌 Connect your smartphone to a powerful charger (at least) 2A) on 15-20 minutes, even if the indicator does not burn.
- 🔌 Use the original cable, as "charging-only" cables may not transmit wake signals.
- 🔌 Try to connect the device to USB-port of a TV or other gadget where voltage is supplied differently.
This method is based on the peculiarity of the power controller, which, when the voltage surges sharply, can initiate the start of the system, but the effectiveness of this method depends on the degree of battery discharge and the residual charge in the circuit board capacitors.
Hardware closing of contacts on the board
If the software is powerless, you have to physically push the board. On the Redmi Note 4 motherboard (codenamed nickel or natrium), the power button contacts are displayed on a tailgate that goes to the side of the board, and when the back cover is removed, you can access the contacts on the board itself.
To do this, you'll need a thin tweezer or needle. Close the two pins that match the power button carefully for a split second. This action simulates the push of a button. Be extremely careful not to damage adjacent elements and short circuit other parts of the board.
☑️ Autopsy safety
This method requires disassembling the device, which can lead to the loss of warranty if it was still in effect, and there is a risk of damage to plumes or other components if you do not handle it carefully, and only use this method as a last resort when other options are exhausted.
Set up automatic on-charging
One of the most useful features for users with a faulty button is the ability to configure the automatic turn on of the smartphone when connecting to the network. There is no such option in the standard MIUI menu, but it is often present in custom recavers or can be activated through special applications if the phone is at least occasionally turned on.
If you manage to turn your phone on by one of the methods described above, install an automation application like MacroDroid or Tasker immediately, and you can create a macro with this: If power is connected and the screen is off -> Emulate pressing the Home/Loudness button (to wake the screen) or use root rights for a direct power command.
| Method | Essential tools | Efficiency | Risk of damage |
|---|---|---|---|
| ADB / Fastboot | PC, USB-cable | Tall. | Low. |
| Recovery Mode | Charger | Medium | Low. |
| Close of contacts | Tweezers, screwdriver. | Tall. | High-pitched |
| Connection to PC | Computer, cable. | Low. | Low. |
Automation settings allow you to extend the life of your smartphone until it is repaired, but it is worth remembering that without the on button, you will not be able to restart the device if it freezes, so the stability of the system becomes critical.
Interim solutions and plume replacement
No software crutch can replace a good one. If the power button on the Xiaomi Redmi Note 4 stops working, it's only a matter of time before the problem affects other buttons or the plume as a whole. Temporary measures are good for saving data, but not for permanent use.
Replacing a button plume is a cheap and fast procedure, and it costs cheap, and it takes about a bit to replace it. 15-20 And there are lots of video instructions on how to disassemble this particular model, because it's a pretty modular design, even for an inexperienced user.
If you decide to leave your phone in its current state, use the widgets on the lock screen to control the basic functions. Set up a double tap to turn on the screen (Double tap to wake function), which partially compensates for the lack of a physical button. Also activate the voice assistant for basic commands.