How to restart Xiaomi Mi A3 without the power button: all working ways

Xiaomi Mi A3 is a popular smartphone with the Android One software platform, but even it has crashes that require a forced reboot. What to do if the power button fails or jams and the phone freezes? In this article, we will discuss all possible methods of restarting the device without physically pressing the power key.

The problem is not only relevant for the Mi A3, but also for other Xiaomi models with similar architecture (for example, the Mi A2 or Mi A1). However, the Mi A3 has nuances due to the features of the firmware and hardware platform of the Qualcomm Snapdragon 665. We will look at both software and hardware solutions – from connecting to a PC to using hidden Android features.

Important: if the power button is mechanically damaged, the problem will persist after the restart, which will require repair or replacement of the button, but for a one-time restart, our methods will work.

1.Reboot via connection to charger

The easiest way is to take advantage of the smartphone’s response to the power connection. Xiaomi Mi A3 supports the automatic on function when charging, but only if the battery is completely discharged or the system is in a “hard” freeze.

How it works:

• 🔌 Connect your phone to the original charger (preferably with a cable) USB Type-C, coming in the kit).
• ⏳ Wait 5-10 minutes. If the screen isn't responding, try turning off and reconnect the cable.
• 🔄 In some cases, the smartphone itself will restart in 15-20 minutes (if the system determines a critical state).

This method doesn't always work, but it's worth trying first. If the Mi A3 doesn't respond, move on to the following methods.

⚠️ Note: Do not use uncertified high-current chargers (more than 2A) this can cause the battery to overheat, especially if the phone is in abnormal mode.

2. Forced reboot via ADB (Android Debug Bridge)

If the Xiaomi Mi A3 has USB debugging enabled, you can reboot it with your computer, which requires pre-tuning, but works even when the interface is completely frozen.

What you need:

• 🖥️ Computer with installed Xiaomi drivers and package ADB (You can download from the official Google website).
• 🔗 USB-cable (preferably original).
• ⚙️ Included debugging by USB in the developer settings (Settings) → The phone. → Assembly number (7 times) → For developers → Debugging by USB).

Instructions:

1. Connect the Mi A3 to the PC.
2. Open the command line (Win + R → enter cmd).
3. Enter the command to check the connection: adb devices If the device appears in the list, reboot: adb reboot

If the command doesn’t work, try the forced reboot in fastboot mode:

adb reboot bootloader

Then exit the fastboot command:

fastboot reboot

⚠️ Attention: If debugging is on USB It wasn't activated in advance, it won't work.

Install Xiaomi drivers on PC|Download ADB Tools (platform-tools)|Enable debugging on USB on the phone (if it works)|Use the original USB-cable-->

3.Use of Recovery Mode

If the power button doesn't work, but the phone responds to other key combinations, you can try logging into Recovery Mode and rebooting from there. For the Mi A3, this is done via a mix of volume and power buttons, but since the latter is faulty, an alternative approach will be needed.

Method 1: Through ADB (if debugging is enabled):

adb reboot recovery

Method 2: Physically shutting down the battery (only for power users!):

• ⚠️ Disassemble the phone (requires a plastic spatula and a set of screwdrivers).
• 🔋 Carefully disconnect the battery plume for 10-15 seconds, then plug back in.
• 🔄 The phone will automatically reboot in Recovery Mode.

In the Recovery menu, select Reboot system now using volume buttons and confirm the selection (if the screen is touch, tap on the item).

4.Reboot via Fastboot Mode

Fastboot is a firmware mode that allows you to control your phone from a PC even when the operating system is broken. For the Xiaomi Mi A3, Fastboot is logged in via ADB or a hardware combination.

If the power button is not working, but the phone is determined by the computer, do:

adb reboot bootloader

After logging into Fastboot (the image of a hare in a hat-eared hat will appear on the screen), enter the command to reboot:

fastboot reboot

If the Mi A3 doesn’t respond to ADB, but you can physically interact with the volume buttons, try:

1. Connect the phone to the charger.
2. Press the volume button down and hold for 10-15 seconds.
3. If the screen catches fire (the Fastboot logo appears), release the button and connect the phone to the PC to execute the fastboot reboot command.

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If you don't have access to a PC, but the phone is detected in Fastboot, you can try rebooting by holding the volume button up for 20 seconds. This won't work on all firmware, but it sometimes helps.

5. Alternative methods: using USB OTG and external devices

If none of the previous methods worked, you can try emulating the power button with the help of USB OTG-And this is a cable and an external keyboard or mouse. This method works because the Xiaomi Mi is a very powerful device. A3 supportive USB Host Mode.

What you need:

• 🔌 USB OTG-adapter (Type-C) → USB-A).
• ⌨️ USB-keyboard or mouse (wired or wireless with USB-receiver).

Instructions:

1. Connect. OTG-phone adapter.
2. Connect the keyboard or mouse.
3. On the keyboard, press the Ctrl + Alt + Del combination (emulates the reboot on some firmware).
4. If that doesn’t work, try holding the Power on the keyboard (usually the button in the top right corner).

On some custom firmware, this method even allows you to control the Recovery menu using a keyboard. However, on Android One stock firmware, functionality may be limited.

⚠️ Attention: Not all USB OTG-Adapters are compatible with Xiaomi Mi A3. Use adapters with support USB 2.0 and power no more than 5V. Cheap Chinese adapters may not work.

Extreme measures: disassembly of the telephone and short circuit

If all previous methods have failed and the phone is critical, you can try to initiate a reboot through short circuit of the power button contacts.This is a risky way that can damage the board, so use it only as a last resort.

What to do:

1. 🛠️ Disassemble the phone by removing the back cover (a plastic spatula will be needed and a hairdryer heated to soften the glue).
2. 🔍 Find the contacts of the power button on the motherboard (usually signed as PWR_KEY or POWER_SW).
3. 📎 Close the contacts carefully with tweezers or screwdriver for 1-2 seconds (no longer!).

If done correctly, the phone must reboot, but this method requires expertise in electronics repair, and an error can lead to:

• 🔥 Burning out the lanes on the board.
• 💥 Damage to the power controller.
• 🚫 Total loss of device performance.

If you are not sure about your skills, it is better to contact a service center.

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Short-circuiting the contacts of the power button is an extreme measure that should only be used if other methods are not possible. The risk of damage to the phone is very high!

FAQ: Frequent questions about rebooting Xiaomi Mi A3 without power button