Xiaomi Redmi S2 not included: full recovery guide

When the beloved Redmi S2 suddenly refuses to respond to the power button, it can take anyone by surprise: the screen stays black, the indicators do not light up, and it seems that the device has turned into a useless piece of plastic. However, it is too early to panic: in most cases, the Xiaomi smartphone can be brought back to life without the expensive trip to the service center.

The problems with Android devices are often not a fatal motherboard failure, but a software failure or a deep battery discharge. Understanding the sequence of actions in diagnostics saves time and nerves. In this article, we will discuss in detail the algorithms for restoring the health of your gadget.

Before we get to the complex manipulations, we need to eliminate the trivial factors, and often users forget the simplest things that block the system from starting, and we'll look at both the software methods of "resuscitation" and the ways of checking the hardware.

Primary Diagnosis and Nutrition Testing

The first thing to do is make sure that the problem is not related to the complete depletion of the lithium-ion battery. If the smartphone was lying idle for a long time, the battery voltage could fall below the critical threshold, and the power controller blocked the turn on for safety reasons.

Connect the original charger and a cable that is perfectly functional. Leave the phone on charge for at least 30-40 minutes, even if the screen is not showing signs of life. The charging indicator may not catch fire immediately, but only after setting a minimum charge.

⚠️ Warning: If the smartphone body in the battery or processor area starts to heat up strongly during charging, immediately disconnect the device from the network.

After a long charge, try to perform a forced reboot, press the power button and hold it for 15-20 seconds, and in some cases, the system can exit the sleep mode in this way.

Notice how the LED lights behave, if they flash red, they're a sign of deep discharge, and if they don't light up at all, maybe the charging connector or the plume connecting them to the board is faulty.

Software failure and system freeze

One of the common reasons why Xiaomi Redmi S2 is not turned on is a critical failure of the MIUI operating system. the mobile processor could "hang" in the error cycle, which is why the device does not respond to external commands.

In this case, resetting to factory settings through the recovery menu helps. To enter Recovery mode, you need to simultaneously press the power and volume buttons. Hold them until the Mi logo appears, then release the power button, continuing to hold the volume button.

In the Recovery menu, you navigate with volume buttons, and you choose with the power button. You need to find the Wipe Data and confirm the action, which will delete all user data, but can save the device from software death.

If you can't log in to Recovery, try Fastboot mode. Press the power button and the volume down button. You should see a bunny fixing an android on the screen, or the Fastboot logo. If that mode works, then the hardware is good, and you can fix the problem by flashing it over your computer.

Using Fastboot Mode to Restore

Fastboot mode is a low-level interface for interacting with your device. If your Redmi S2 is in this mode, you have a high chance of recovering it software-free (in some cases) or with complete firmware reflashing.

You'll need a PC with ADB and Fastboot drivers installed, and Mi Flash Tool. Connect your smartphone with a cable to your computer and run the program. If the device is identified, you'll see its serial number in the list.

The firmware process requires care. You need to download the current firmware version for your model from the official website. It is important to choose the right firmware type: Fastboot (.tgz extension), not Recovery (.zip).

When running through Fastboot, it is important not to interrupt the connection. USB. Use motherboard ports at the back of the system unit, avoiding front ports or USB-Hubs that can give unstable food.

💡

Successful login to Fastboot confirms the serviceability of the processor and memory, shifting the focus of diagnostics to software.

Hardware malfunctions and payment diagnostics

If software methods are powerless, there is likely a hardware problem: In the Redmi S2, as in many Xiaomi smartphones, it is common to see the dump of the display plume or oxidation of the contacts after moisture hits.

Try to press the top of the screen carefully or bend the case slightly (without fanaticism).If the screen blinks or an image appears, then the problem is poor contact of the display plume with the motherboard.

⚠️ Warning: Self-disassembly of the smartphone removes the warranty. If you do not have the skills to work with small electronics, it is better to entrust the repair to specialists.

A common cause is also a failure of the power controller or memory chip, which can occur due to a voltage surge when charging a substandard unit or a strong impact when falling.

To accurately diagnose the board, you need a multimeter and a circuitry, you need to ring the battery circuit and check for voltage at the output of the power controller, and you can't do that without special equipment.

💡

Before going to the service, take a photo IMEI-If you have a back cover code, or find a box, it will help the craftsmen identify the model and the package faster.

Resetting via computer and ADB-team

If the phone is switched on but the system is not booting, you can try USB debugging control. However, the debugging mode had to be on in advance. If you have access to the menu, use ADB commands to reboot.

Open the command line on your computer and enter the command to restart in Restore mode:

adb reboot recovery

Or a command to reboot to the bootloader:

adb reboot bootloader

These commands only work if the device drivers are installed correctly on Windows or Linux. If the computer can't see the phone, try installing Qualcomm or MediaTek drivers manually, since the Redmi S2 is built on the Snapdragon platform.

In some cases, the complete data cleanup command helps, but it requires confirmation on the phone screen, which is impossible to do with a black screen, so this method is only relevant with a partially working display.

When professional repairs are needed

There are a number of symptoms in which self-repairing is not only useless, but also dangerous. If after connecting to the charger you hear the smell of burning, see smoke or feel a strong local heating at one point, immediately stop trying to turn on.

The handyman's help is also needed if the phone falls into the water, and even if it is still turning on, the contacts can corrosion in a few days, leading to costly motherboard repairs.

Battery replacement is another procedure that is best done in the service if you don't have experience.In the Redmi S2, the battery is glued to the body, and careless removal can damage the plumes or the body itself.

The cost of repairs should be correlated with the market price of a used device, and sometimes it can cost more to replace a display or board than to buy a similar phone on the secondary market.

Prevention of inclusion problems

To avoid situations where your smartphone stops turning on, follow simple rules of operation: Don't let the battery run completely to zero on a regular basis. Deep discharge is harmful to lithium battery chemistry.

Use only certified cables and power supplies. Cheap charging from the nearest stall often doesn't have voltage stabilization, which is detrimental to the phone's power controller.

Regularly update the software. In newer versions of MIUI, developers often fix bugs that can cause the system to freeze, and back up important data to the cloud.