The earpiece of my Xiaomi Poco x7 has stopped working

The earphone on my Xiaomi Poco X7 has stopped working ?

You're in the middle of an important call, or maybe listening to that much-awaited audio, and suddenly... silence. You realize that the earphone on your Xiaomi Poco X7 has stopped working. You can't hear anything, or the sound is so faint and distorted it seems to come from another dimension. Don't panic! At iLevante.com, we not only offer the best replacement parts for your Poco X7, but we've also brought you the ultimate guide to understand what happened and how to fix it. 

Main Speaker Xiaomi Poco X7

Receive it on monday 20 de october

6.25€

Facing a sound issue can be frustrating, but most of the time, there's an easier solution than you think. Join us on this journey where we break down the potential causes, the implicated components, and, of course, how to give your phone its voice back.

Diagnosing the problem: Why can't I hear my Poco X7?

Before thinking of opening the phone, it's crucial to identify the origin of the issue. The problem may lie in the earphone speaker (the one used for calls) or the main speaker or buzzer (the one that plays music, tones, and speaker mode). Let's analyze the most common causes.

Software-related failures

Sometimes, the solution is simpler than it appears and doesn't require replacing any part. A software failure could make your speaker mute. Before anything else, try this:

• Restart the device: The classic "turn it off and on again" fixes more issues than you'd think, freeing blocked processes that might be affecting the audio.
• "Do Not Disturb" or Silent Mode: Ensure you haven't activated a mode that silences notifications or calls. Also, check the media and call volumes.
• Bluetooth connection: Is your Poco X7 trying to send the sound to a pair of headphones or Bluetooth speaker you're not using? Disable Bluetooth from the quick access panel and check if the sound returns.
• Pending updates: A bug in an old version of MIUI could be the culprit. Go to Settings > About phone > MIUI Version and check for updates.
• Factory reset: As a last software resource, back up your data and reset the phone to its original settings. If the issue persists, it's almost certain it's a hardware fault.

Physical and hardware issues: The root of the silence

If software isn't the culprit, it's time to think about the hardware. Here, causes can vary, from dirt to damaged components.

• Dirt and blockage: It's the number one cause and the easiest to resolve. Over time, the earphone grille and the main speaker accumulate dust, lint, and other debris. This blocks the sound output, making it very faint or completely silent.
• Liquid damage: A tiny splash or exposure to a very humid environment can be enough to damage the delicate internal components of the speaker. Corrosion is the silent enemy of electronics.
• Impacts and falls: A strong hit can disconnect the speaker flex, damage the internal coil, or crack the membrane. Even if the phone looks unscathed on the outside, the inside may have suffered damage.
• Natural wear: Like any electronic component, speakers have a lifespan. With heavy use, the coil and membrane can degrade, resulting in poor sound quality or total absence of sound.

The issue isn't always the speaker: External causes

This is where things get more technical. Sometimes, you buy a Main Speaker Xiaomi Poco X7, install it with all the excitement in the world and... it still doesn't work. ? This might happen because the problem isn't with the speaker itself, but with another component managing the audio.

The Connection Flex

The earphone speaker isn't directly soldered to the motherboard. It connects via a flex cable. This cable is a flexible ribbon with very fine copper traces. A hit, a previous repair poorly executed, or simply the chassis being bent can damage it. If this flex gets cut or its connectors become dirty or damaged, the speaker will be entirely disconnected, even if it's in perfect condition. At iLevante.com, besides the speaker, you can also find the connection flex for Poco X7.

The Auxiliary Board or Charging Module

In many models, the main speaker (buzzer) doesn't connect to the main motherboard but to an auxiliary board located at the bottom of the phone. This board also often integrates the USB-C charging port, the main microphone, and the headphone jack. If this auxiliary board gets damaged (for example, by moisture in the charging port), it can disrupt the signal going to the main speaker. Therefore, if your issue is with the speaker mode or music, a potential solution is to replace the complete charging connector module of the Poco X7.

The Audio Chip (Codec) on the Motherboard

This is the worst-case scenario. The brain of the entire sound system is an integrated circuit (IC) on the motherboard, known as the audio codec. This chip processes the digital signal and converts it to analog so that the speakers can play it. A very strong impact or a severe short-circuit can desolder or damage it. This repair is complex and requires micro-soldering skills, so it's usually reserved for professional services. It's a rare cause, but not impossible.

Repair guide: How to replace the earphone speaker of the Xiaomi Poco X7

If you've concluded that you need to replace the speaker, you're in the right place! With the correct tools and a little patience, it's a repair you can do yourself. At iLevante.com, we have the replacement earphone speaker for Xiaomi Poco X7 of the highest quality.

Necessary tools

Before starting, make sure to have everything at hand:

• Precision screwdriver set.
• Plastic pick or opening tool.
• Suction cup.
• Heat gun or hair dryer.
• Precision tweezers.
• Adhesive for the back cover (B-7000 or similar).

Step-by-step replacement process

1. Power off the device: Press and hold the power button and select "Turn Off".
2. Remove the SIM tray: Use the extraction tool to eject the SIM card tray.
3. Heat the back cover: Using the heat gun or hair dryer, apply heat evenly around the edges of the back cover for a couple of minutes. This will soften the adhesive.
4. Open the device: Place the suction cup near the charging port and gently pull while inserting a plastic pick into the small opening created. Slide the pick around the outline to cut the adhesive and separate the back cover. Do this carefully to avoid damaging internal flex cables.
5. Remove the intermediate frame: Unscrew all the screws securing the upper plastic shield (covering the motherboard). Once the screws are removed, carefully detach the cover.
6. DISCONNECT THE BATTERY!: This is the MOST IMPORTANT step. Using a plastic spatula, disconnect the battery connector from the motherboard. Now you can work safely.
7. Locate and remove the earphone speaker: The earphone speaker is a small piece located at the top of the chassis. Normally, it's pressure-fitted or held by a small flex. Carefully disconnect its connector using the tweezers or spatula and remove it from its slot.
8. Install the new speaker: Place the new earphone speaker replacement from iLevante.com in the same position. Ensure the gold contacts align correctly, and connect its flex if it has one.
9. Test before closing: Reconnect the battery (temporarily) and power on the phone. Perform a test call to verify the new speaker works perfectly. Don't skip this step!
10. Reassemble: If everything works, turn off the device, disconnect the battery again, and proceed to reassemble everything in reverse order. Replace the intermediate frame, screw it in, apply new adhesive to the frame, and seal the back cover, applying pressure for a while to ensure it sticks well.

Possible issues during the repair and how to prevent them

The DIY journey is full of small obstacles. Here's a list of common issues so you can be prepared:

• Breaking the back cover: They're made of glass or plastic and can crack if you apply too much force or insufficient heat. Prevention: Be patient, heat the adhesive well, and use plastic tools, never metal ones.
• Damaging a flex cable: The flexes (screen, battery, fingerprint sensor) are extremely fragile. Prevention: Work delicately, always use plastic tools to disconnect them, and carefully trace their path before disassembling anything.
• Losing screws: They're tiny and love to disappear. Prevention: Use a magnetic mat or organizer to keep them sorted and know where each one goes.
• Causing a short circuit: This happens if you handle components with the battery connected. Prevention: Disconnecting the battery isn't a suggestion, it's a command. Always do it first!

Technical features of the Xiaomi Poco X7 earphone speaker

Although manufacturers don't usually provide detailed specifications of these components, an earphone speaker for a smartphone like the Poco X7 typically has the following characteristics:

• Type: Miniature dynamic speaker.
• Technology: Moving coil and neodymium magnet for maximum power in a small size.
• Impedance: Generally ranges between 8 and 32 ohms. An incorrect impedance can affect the volume and sound quality.
• Connection: It may connect via spring contacts that fit onto pads on a flex or through a small ZIF (Zero Insertion Force) connector integrated on its own flex.
• Format: Designed to fit perfectly into the Poco X7 chassis, with guides and specific shapes for proper positioning and to create a small acoustic chamber enhancing voice resonance.

At iLevante.com, all our replacement parts for Xiaomi are OEM quality, ensuring these specifications are perfectly met for performance identical to the original.

We hope this guide has been of great help to you. A sound issue might seem like the end of the world, but with the right information and components, your Xiaomi Poco X7 can come back to life. Don't hesitate to visit our online store to find all the parts and replacements you need!