Xiaomi Redmi 4X No charge: full diagnosis and repair

Xiaomi Redmi 4X — One of the most popular budget smartphones 2017 for years, but even through 5-7 You've had a lot of charging problems in years, you plug in a cable, the light doesn't burn, the battery runs out, or the device doesn't respond to the charger at all, and there's a dozen reasons, from the usual contamination of the connector to serious hardware failures.

In this article, we will discuss all the possible reasons why Redmi is a good idea. 4X You'll learn how to tell a software failure from a hardware malfunction when you can handle it yourself and when it's time to carry your phone to service. We also collected up-to-date data on repair prices in 2026 and answers to frequent user questions.

1.Primary diagnosis: check the charger and cable

Start with the simplest one, eliminate the faulty charger or cable. 30% In case the problem lies here. Take another charging kit (preferably original or certified by Xiaomi with settings). 5V/2A) and check:

• 🔌 Get Redmi on board. 4X to another charger (e.g. from Redmi Note 4 or Mi) A1 — they're compatible).
• 📱 Try charging another phone with the same cable and power supply.
• 🔄 Turn the cable over in the Micro-USB connector (sometimes the contacts wear out unevenly).
• 💡 Light a flashlight at the charging port – if dirt, oxidation, or bent contacts are visible, the problem is found.

If with another charger the phone started charging - it's the power supply or the cable.Original Xiaomi chargers for Redmi 4X mark MDY-08-EM (5V/2A). Use of cheap analogues with parameters 5V/1A It can lead to slow charging or lack of it.

⚠️ Note: Do not use chargers with output current more 2A — This could damage the Redmi power controller. 4X. Also avoid “fast” charging from other brands (such as Samsung Adaptive Fast Charging) unless they are certified for Xiaomi.

2.Cleaning the charging port: how to remove dirt and oxidation

Micro-USB port at Redmi 4X — One of the most vulnerable places is that over time, dust accumulates inside, fibers from clothing, and contacts become oxidized from moisture, which leads to poor contact and intermittent charging.

You'll need:

• 🪥 Toothpicking (wooden or plastic).
• 🧴 Alcohol (isopropyl or medical 90%+).
• 🎨 Brush with soft bristles (for example, for drawing).
• 💡 Lantern (for port lighting).

Step-by-step:

1. Turn off the phone and remove the battery (if possible).
2. Light the port with a flashlight and check for debris.
3. Gently blow the port (you can use a can of compressed air for equipment).
4. Moisten the toothpick in alcohol and wipe the contacts inside the port (don't press hard!).
5. Let the port dry. 10-15 minutes before connecting the cable.

⚠️ Warning: Do not use metal objects (needles, paper clips) to clean the port - they can close contacts or scratch the coating. Also avoid cotton swabs: fibers can stay inside and exacerbate the problem.

The phone is turned off and the battery is removed (if possible)

Alcohol used 90%+ cleaning

Contacts wiped without pressure.

The port completely dry before connecting

Quality of contact after cleaning-->

3. Battery check: bloating, wear and replacement

Average battery life in Redmi 4X — 2-3 year ~500 Then the capacity drops to the bottom. 30-50%, The power controller can block charging because of critical battery wear, and the battery can swell, which is dangerous and requires immediate replacement.

Signs of a faulty battery:

• 🔋 The phone turns off when 20-30% charge.
• 📉 The battery is discharged in a few hours in standby mode.
• 🔥 The body of the phone is deformed (especially from the battery side).
• 🚫 Charging is interrupted by 80-90% (Protection of the controller is activated).

To check the status of the battery:

1. Enter the number #4636##.
2. Go to the Battery Information menu.
3. Look at the health level (if any) parameter. Normally, good or >80%.
4. Or use apps like AccuBattery (available on Google Play).

If the battery is swelling, don't try to puncture or bend it, it can cause fire. Contact the service center. 4X 2026:

• Original battery (capacity) 4100 mic) — ~1500-2000 ₽.
• Analogue (e.g. Remax, Baseus) — ~800-1200 ₽.
• Replacement with work — ~500-1000 ₽ (depending on the service).

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If you decide to replace the battery yourself, pre-heat the back cover of Redmi. 4X hair dryer (temperature) ~60°C) - this will soften the glue and make it easier to disassemble.

4. Software failures: resetting settings and firmware

Sometimes Redmi. 4X It does not charge due to a firmware failure or system process conflict, and this may occur after the update. MIUI, custom firmware installation or virus infection, in which cases it helps to reset or flash the flashing.

Ways to resolve program problems:

• 🔄 Soft reset: Press the power button on 10-15 seconds until the phone restarts.
• 📱 Reset to factory settings: Go to Settings → Additionally. → Recovery and discharge → Resetting settings.
• 🖥️ Fastboot flashing: If the phone doesn’t turn on but reacts to a PC connection (light indicator), you can flash it through the Mi Flash Tool.
• 🛠️ Virus Removal: Use Malwarebytes or Dr.Web Light to scan the system.

If the phone doesn’t turn on at all, but reacts to charging (the indicator flashes), try entering Fastboot mode:

1. Turn off the phone (if it is on, press the power button before turning off).
2. Hold the Loud down. + Meals for food 5-10 seconds.
3. Connect the phone to your PC and check if it is detected in Device Manager.

⚠️ Note: When you flash through Fastboot, all data will be deleted. If there is important information on your phone, try retrieving it first. ADB (Backup commands: Adb pull /sdcard/ DCIM_backup adb pull /data/media/0/ Downloads_backup

5. Problems with the power controller and motherboard

If all previous steps did not help, most likely, the problem is in the hardware — the charging controller burned down, the motherboard damaged or the contacts left. 4X The power is provided by Qualcomm chip PM660 (or similar) which may be affected by:

• ⚡ Voltage surges (for example, when using low-quality chargers).
• 💦 Moisture infestations (even if the phone didn't sink, condensation could damage the board).
• 🔥 Overheating (for example, if the phone was lying on a charger for a long time under the sun).
• 🛠️ Failed repair (damage to tracks when replacing battery).

How to diagnose a hardware malfunction:

• 🔍 Check if the phone warms up when connecting the charge (if so, a short circuit is possible).
• 🔌 Connect your phone to your PC – if it’s detected but not charged, the problem is in the power chain.
• 🔋 Look at the charging indicator: if it flashes red or doesn’t burn at all, it may indicate a faulty controller.

Repairing a power controller or motherboard is a challenge for professionals, with the average cost of repairs in 2026:

• Diagnostics — ~300-500 ₽.
• Replacement of the power controller — ~1500-2500 ₽.
• Repair of tracks (splintering) — ~1000-2000 ₽.
• Replacement of motherboard — ~3000-5000 ₽ (unprofitable for Redmi 4X).

⚠️ Warning: If your phone doesn't respond to charging, power button, or PC connection at all, don't try to disassemble it yourself. 90% of the time, it causes more damage).

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If Redmi 4X It does not charge or turn on, but when connected to a PC it emits an audible signal - the problem is most likely in the firmware or bootloader, and not in the hardware".

6. Alternative charging methods (if the port is not working)

If the Micro-USB port is physically damaged but the phone is still alive, alternative charging methods can be tried, which are temporary, but can save data or use the phone before repair.

Ways to bypass a non-working port:

• 🔌 Wireless charging: Redmi 4X It doesn't support Qi out of the box, but you can use a wireless charging receiver (like the Nillkin Magic Disk — ~500-800 ₽.
• 🔋 External battery with USB-Connect the phone to the power bank via OTG-Adapter (if the port is still partially operational).
• 🖥️ Charging through USB-OTG: If the port is damaged on one side only, you can connect the back cable.
• 🔧 Direct battery connection: Services can solder wires directly to battery contacts (temporary solution).

For wireless charging, you will need:

1. Buy a Qi receiver (e.g., Xiaomi Wireless Charging Receiver).
2. Connect it to the battery contacts (plus to plus, minus to minus).
3. Lock the receiver with tape inside the case.
4. Put your phone on a wireless charging station.

⚠️ Attention: Wireless charging for Redmi 4X It will be very slow (about the same time). 0.5A opportunistic 2A). Also make sure that the receiver does not overheat - this can damage the battery.

7 When repairs are not advisable: is it worth fixing Redmi? 4X 2026

Xiaomi Redmi 4X It was released in 2017, and it may not be cost-effective to repair it in 2026:

If the cost of repair exceeds 50-60% It makes sense to consider buying a new (or used) smartphone instead of repairing a Redmi, for example. 4X post 3000 ₽ buy:

• 📱 Redmi 9A (new) — ~6000-7000 ₽.
• 📱 Redmi Note 8 (b/w) — ~5000-6000 ₽.
• 📱 Poco C31 (b/w) — ~4000-5000 ₽.

But if the Redmi 4X It's functionally fine, and the problem is only the battery or the port, the repair is justified, the main thing is not to skimp on spare parts (for example, take the original battery, not the cheap one).

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If you are using Redmi 4X as a spare phone or for specific tasks (e.g, GPS-tracker), repairs for 1000-1500 ₽ even in the case of 2026 year.

FAQ: Frequent questions about charging Xiaomi Redmi 4X