How to turn on Xiaomi Redmi 4X if it doesn’t respond to a button

When the beloved Redmi 4X suddenly stops responding to pressing, it can take anyone by surprise: the screen stays black, the indicators do not burn, and you feel that the device has turned into a useless piece of plastic and metal. However, it is too early to panic: in most cases, the problem lies not in the fatal failure of the motherboard, but in a software failure or deep battery discharge.

Before you bring your gadget to the service center, you should do your own diagnostics. Often the cause of "death" of a smartphone is a hanging processor or a failure in the power management system, which is easily eliminated by simple manipulation of buttons. It is important to understand that modern Android devices have several layers of protection and loading modes, access to which can save your data.

In this article, we will examine all possible scenarios, from trivial discharge to complex cases of “brick”, and offer step-by-step solutions. You will learn how to revive Xiaomi without losing photos and contacts, and understand at what point self-repair becomes dangerous.

Primary diagnosis and exclusion of simple causes

The first thing to do is to rule out the most obvious factors that are often ignored in a hurry: If the Redmi 4X doesn't turn on, maybe the charger has lost contact or the cable is damaged. Try leaving the phone on charge for at least 30-40 minutes, even if the screen doesn't light up right away. Sometimes the power controller needs time to "swing" the fully-secure battery to the minimum voltage to start.

Carefully inspect the charging connector for dust, pile or oxidation. Pollution in the Micro-USB port can prevent normal contact, which simply does not flow to the board. Carefully clean the connector with a dry toothbrush or wooden toothpick, trying not to damage the central tongue inside the socket.

It is also worth checking the power supply and cable itself. Try charging your smartphone from another source, for example, from a different source. USB-If the charging indicator (red LED) never caught fire, the problem may lie deeper.

⚠️ Warning: If the phone gets too hot before it stops turning on, don't try to charge it right away.Let the device cool completely to room temperature to avoid damaging the battery's chemical elements.

Sometimes the problem is solved by replacing a cable that visually may look whole but have an internal cliff, and using original or certified accessories greatly increases the chances of a successful resuscitation of the device.

The method of forced reset (Hard Reset buttons)

The most effective way to revive a frozen Redmi 4X is by force rebooting, which releases static voltage from the power controller and forces the processor to start, bypassing standard shutdown procedures. To perform this procedure, you will need to pinch and hold the power button.

The process is this: press the Power button and hold it continuously for 15-20 seconds. In some cases, especially when the system is deep freeze, you may need a combination of volume buttons. Try to press the Volume Down + Power or Volume Up + Power buttons simultaneously.

If you did everything right, the device should vibrate, and the Mi or Android logo will appear on the screen. Release buttons immediately after the vibration or logo appears.If the phone vibrates but the screen remains black, maybe there is a problem in the display, but the system works.

This method is safe for your data, because it doesn't reset your settings, it just forcefully restarts the operating system. If you don't respond after a few attempts, move on to more sophisticated methods.

Diagnostics via Fastboot and Recovery

If a normal boot is not possible, it is worth checking whether Redmi 4X responds to low-level commands.Fastboot mode allows you to interact with the phone at the bootloader level even if the operating system is damaged.To enter this mode, you need to turn off the phone (if it is on) and pinch the Volume Down + Power key combination.

If you log in successfully, you'll see an image of a hare repairing an android and the words "FASTBOOT." If the screen catches fire and this picture, then the motherboard, display and buttons are all good, and the problem lies in the software part or the file system.

The alternative mode is Recovery. To get into it, press Volume Up + Power. In the Recovery menu, you can choose the language (Chinese / English) and try to clean the cache (Wipe Cache) or complete reset (Wipe Data).

It is important to remember that a full reset via Recovery (Wipe All Data) will delete all your photos, contacts and applications. Use this option only if the data is not important or already stored in the Mi Cloud.

Problems with battery and power controller

Xiaomi Redmi 4X is not a new model, and the degradation of the lithium polymer battery is quite natural here. If the battery has gone into a deep discharge (below 2.5-3 Volts), standard charging may not start the process.

In these cases, the push method helps. Leave the phone connected to a powerful charger (at least 2A) for a few hours, even if the indicator is silent. Sometimes it takes up to 4-5 hours for the voltage to rise to the launch threshold. You can also try to gently warm the back cover with a hairdryer (without overheating!) for 1-2 minutes - the heat accelerates the chemical reactions in the old battery.

If you have disassembly skills, you can remove the back cover and disconnect the battery plume from the board, and then reconnect it again, which resets the battery controller's protection, but if the battery bloat is visible to the naked eye, it is strictly forbidden to operate it because of the risk of fire.

⚠️ Attention: A bloated battery can damage the display matrix or unplug the screen. Don't press it or try to pierce it - this will cause the electrolyte to instantly ignite.

Replacing the battery is a routine routine for the Redmi 4X. The model is popular, and finding a compatible battery (such as a BM22 or BM47, depending on the modification) is not difficult. Once replaced, the problem with turning on is solved in 90% of cases, if there were no surges.

Fastboot and Mi Flash Tool

If the phone is in Fastboot mode, but normally hangs on the logo or goes into cyclical reboot, you need a flashing, USB-Download the official firmware for your model from miui.com (Fastboot version, extension.tgz).

Unpack the firmware archive in the root of the C disk so that the path is short, for example: C:\rom\. Run the Mi Flash Tool on behalf of the administrator. Connect the phone that is off in Fastboot mode to your PC. Press the Refresh button in the program — if the device is identified, you will see its serial number.

adb devices


fastboot devices




fastboot flash recovery recovery.img

Select the firmware mode "Clean All" (complete clean) or "Save User Data" (attempting to save data, but not always working for critical errors). Press "Flash" and wait for the process to end. Green "success" means that the operating system is restored.

💡

Fastboot firmware is a radical but often the only way to save a phone after a failed update or virus attack.

Once the procedure is complete, the phone will automatically restart, and it can take up to 10 minutes to start up as the system optimizes applications.

Hardware malfunctions: when you need soldering

If none of the software methods worked and the phone didn't respond to charging, the buttons and the computer were likely hardware problems, a common Redmi 4X disease, which is a CPU or memory dump due to overheating or falling, and a power controller (PMIC) could also burn after using a poor-quality charger.

Symptoms of hardware breakdown: the phone warms up in the processor area when connected to charging, but the screen is black; current consumption on the power supply jumps or is equal to zero; the appearance of the smell of burning.

In such cases, a diagnostic processor is required in a service center using a microscope and a laboratory power supply, and the processor can only be warmed up temporarily by a hairdryer, if there is experience, and most often, rebolling or replacing the processor is required.

💡

If the phone fell into water, don't dry it with a hair dryer or on a battery! disassemble the case, remove the battery and wipe the board with alcohol, then let it dry for a few days. Turning on the wet phone is guaranteed to kill the fee.

Repairing the motherboard can be cost-effective, as the cost of spare parts for the Redmi 4X is low, but if the processor burns down, it is easier to buy a new or used device, since replacing the CPU is expensive.