Repair Redmi A3x Not Charging Problem | Charging Jumper & Ways [100% Working Guide

If your Redmi A3x is not charging, despite using a new USB cable or power adapter, the issue likely lies in the internal charging circuit, sub PCB, or charger connector. This in-depth guide will walk you through diagnosing and repairing the problem, especially using charging jumper ways. Whether you're a mobile technician or a DIY enthusiast, this article offers clear solutions with image-based jumper directions.

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Common Hardware Reasons for Redmi A3x Not Charging

Before attempting any jumper or repair work, it's crucial to rule out these 4 common hardware-related issues:

1. Clogged or Damaged Charging Port

• Dirt, lint, or corrosion inside the USB-C port can prevent proper contact.

• Solution: Use a soft brush or compressed air to clean the port gently.

2. Faulty USB Charging Cable

• A broken or internally damaged wire will stop current flow.

• Solution: Test with a certified, working cable.

3. Defective Power Adapter

• Cheap or incompatible adapters may not provide enough current.

• Solution: Use a Xiaomi original 5V/2A adapter or equivalent.

4. Weak or Incompatible USB Port Source

• Charging through a laptop or low-powered USB port may be insufficient.

• Solution: Always charge from a wall adapter for best results.

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Tools Required for Hardware Repair

Before you start working on the Redmi A3x, gather these tools:

• Precision screwdriver kit

• Multimeter

• Micro soldering iron

• Flux paste

• Insulated copper jumper wire

• PCB cleaner or isopropyl alcohol

• Hot air rework station (optional)

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How to Repair Redmi A3x Not Charging Problem [Step-by-Step]

If the charging issue persists after trying the above solutions, follow this professional repair process:

Step 1: Disassemble the Phone

• Power off the device and open the back panel.

• Detach the battery connector and remove the charging sub-board.

Step 2: Visually Inspect the Sub-Board

• Look for scratches, burnt components, or corroded pins.

• Pay attention to the bottom-left corner of the sub-board – this area is prone to track damage.

Step 3: Use the Redmi A3x Charging Jumper Solution

Refer to this image for precise jumper solution:

Jumper Guidance:

• 🔴 Top Circle: Identify the motherboard jumper point.

• 🔴 Bottom Circle: Locate the damaged track on the sub-board.

• 🔴 Red Line Path: Use 0.1mm jumper wire to connect the broken track between the sub-board and motherboard.

⚠️ Always apply flux and use micro-soldering tools to avoid damaging adjacent components.

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Extra Tips for Safe and Accurate Repair

• ✅ Use magnification tools to inspect tiny tracks.

• ✅ Test track continuity with a multimeter before and after the jumper.

• ✅ Avoid overheating the board while soldering.

• ✅ Clean the jumper path with isopropyl alcohol after soldering.

• ✅ Always reconnect the battery only after the jumper repair is done and inspected.

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When to Replace the Charging Sub-Board

If:

• The sub-board is heavily corroded

• Charging IC or USB port is loose

• Internal paths are completely burnt or destroyed

➡️ Replace the sub-board with a genuine Redmi A3x part. Do not attempt to repair heavily damaged PCBs as it may cause further motherboard issues.

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Prevent Future Charging Issues

Here are some tips to prevent your Redmi A3x from facing similar issues:

• 🔌 Use original charging accessories.

• 💦 Avoid using your phone in humid or wet environments.

• 🔄 Periodically clean the charging port.

• 🔋 Do not overcharge or use while charging extensively.

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Conclusion: Get Your Redmi A3x Charging Again!

The Redmi A3x not charging problem is often caused by minor sub-board or track issues that can be fixed using a precise jumper wire solution. By following the steps above and referencing the charger jumper diagram, you can bring your device back to life without replacing the entire motherboard.

If you're unsure about performing these steps yourself, consult a qualified mobile repair technician who can safely execute the jumper technique.

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