The top speaker on Xiaomi Redmi Note 9 Pro does not work: reasons and solutions

Xiaomi Redmi Note 9 Pro is one of the most popular mid-range smartphones, but even it is not immune to hardware problems. If you stop working top speaker (either conversational or multimedia), it can manifest itself in different ways: no sound when calling, distorted audio in games or videos, or the speaker is completely silent. In this article, we will analyze all possible causes — from banal settings to serious failures of the board — and give step-by-step instructions for diagnosis and troubleshooting.

It's important to understand that the top speaker in the Redmi Note 9 Pro is responsible not only for spoken sound, but also for stereo playback along with the bottom speaker. If the problem only affects the top speaker, this narrows the range of possible causes. We won't advise "just restart the phone" - instead, we will offer unique methods of verification that you won't find in standard instructions, including tests through the engineering menu and analysis of system logs.

1. Diagnosis of the problem: how to accurately determine the malfunction

Before you rush into repair, you need to make sure that the problem is in the top speaker, not the settings or the software.

• 🔊 Sound Testing through Settings: Go to Settings → Sound. → Sound quality and effects → Speaker test: If the top speaker is silent and the bottom speaker is working, it's hardware or driver-related.
• 📞 Checking during the call: Call another phone and turn on speakerphone. If the sound is only coming from the lower speaker, it confirms that the upper speaker is malfunctioning.
• 🎵 Music playback: Turn on the track in a standard player and cover the bottom speaker with your finger. If the sound is completely lost, the top speaker is not working.
• 🛠️ Physical examination: Light a flashlight into the speaker's grille - if dust, moisture or mechanical damage is visible, this may be the cause.

If the speaker is making wheezing, crackling or distorted sound, it often indicates membrane damage or fluid intrusion, and the complete absence of sound may indicate a contact dump or an amplifier chip malfunction.

2. Programmatic reasons: when firmware or settings are to blame

In 30 percent of cases, the problem is not hardware, it's software.

• 🔄 Resetting sound settings: Go to Settings → System system → Resetting settings → Reset the sound settings, which will return the factory equalizer parameters and eliminate possible conflicts.
• 📲 Update MIUI: Go to Settings. → The phone. → System update. If you have a new version of firmware, install it, because in fresh builds, you often fix bugs with sound.
• 🚫 Application Conflict: Remove newly installed programs, especially those that have requested access to a microphone or speakers (such as voice assistants or modified players).
• 🔇 Do Not Disturb: Make sure that Settings Mode is not activated → Sound. → Don’t bother with limiting media sounds.

You should pay special attention to the engineering menu.

1. Open the Phone app.
2. Enter the code ##36446337## (for models on Qualcomm Snapdragon 720G).
3. Go to the Hardware Testing → Audio → Speaker Test section.
4. Select Speaker Top and run the test.

If the engineered menu doesn't make sound, but it's determined by the system, it's more of a hardware problem. If the test comes up with a Speaker failed error, it could indicate that the speaker's power circuit is damaged.

3. Hardware malfunctions: what breaks most often

If the software methods didn't work, it's the hardware. In the Redmi Note 9 Pro, the top speaker can fail for the following reasons:

The most common problem is clogging the speaker, and over time, dust gets into the grille, or fibers from your pocket or bag that block the membrane, and if you hear a sound that's very quiet or wheezing, try cleaning the speaker carefully.

1. Take a soft toothbrush (preferably a new one).
2. Slightly moisten it in alcohol (no more than 70%).
3. With careful movements, clean the speaker grille without pressing hard.
4. Let the phone dry for 10-15 minutes.

⚠️ Warning: Do not use sharp objects (needles, toothpicks) - they can damage the speaker membrane. Also avoid vacuum cleaners (such as vacuum cleaners), as they create static electricity, dangerous to electronics.

4. Getting liquid: what to do if the phone "drowned"

If the Redmi Note 9 Pro has been in contact with water, tea or other liquids, the top speaker may fail due to corrosion of contacts or short circuit.

• 🚱 Turn off the phone immediately (press the power button for 10 seconds).
• 🔋 Extract. SIM-card and memory card – they can block the evaporation of moisture.
• 🌬️ Dry the speaker: Put the phone with the speaker grille down on a dry wipe. Don't use a hair dryer - hot air can warp the membrane.
• 💧 Wash with alcohol (if the liquid is sticky): If a sweet drink hits the phone, moisten the cotton swab in isopropyl alcohol (90%+) And gently wet the speaker grille.

If after drying the speaker did not work, try the method of displacing moisture:

1. Put the phone in a bag of silica gel (those balls that are put in boxes with shoes).
2. Close the package tightly and leave for 24-48 hours.
3. After a day, take out the phone and check the sound.

A critical mistake many users make is to turn on the phone immediately after the liquid hits, "check if it works." This leads to short circuit and irreversible damage to the sound amplifier. If the speaker fails to work after drying, contact the service - you may need to change the speaker or clean the board from corrosion.

5. Contact collapse dynamics: how to diagnose and correct

If the top speaker is working, then not (for example, the sound appears when you press the body near the speaker), this is a sign of a contact dump. In the Redmi Note 9 Pro, the speaker is connected to the motherboard through a flexible plume that can oxidize or move away over time.

To confirm this malfunction:

1. Put the phone on a flat surface.
2. Lightly press the finger on the area around the top speaker (not on the grille, but on the body next to it).
3. If the sound appears or becomes clearer, the problem is contacts.

Temporary solution (if you don’t want to take your phone apart):

• 📦 Secure the case with tape: Gently wrap the phone around the speaker with paint tape to create pressure on contacts.
• 🔧 Use substrate: Put a thin piece of dense paper under the phone lid (on the speaker side) to press the plume.

For a complete repair, you will need to disassemble the phone and re-sweeten contacts. If you do not have experience in soldering, you should contact the service. The average cost of such repairs is 1000-2000 rubles.

• 🔍 Check the integrity of the plume with a multimeter.
• 🧲 Sweat contacts using flux and solder.
• 🛡️ Apply a protective coating to prevent oxidation.

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If you decide to disassemble the phone yourself, take a picture of the location of all the plumes and screws before disconnecting. The Redmi Note 9 Pro has screws of different lengths, and if you confuse them, you can damage the board.

6. Replacement of the upper speaker: step-by-step instructions

If the speaker is completely out of order (no sound, the membrane is torn, or after getting a liquid), it will have to be replaced. 9 Pro will fit the original speaker with an article MDY07-001 Or analogues from proven manufacturers (e.g. Huaqin — 800–1500 ruble.

Tools required:

• 🔧 Set of screwdrivers (cross, flat, torks) T3–T5).
• 🧲 Screen suction cup.
• 📏 Plastic blades or mediators.
• 🔥 Fryer (for softening glue).
• 🧴 Clay. B-7000 or similar.

Step-by-step replacement process:

1. Turn off the phone and remove the tray. SIM-map.
2. Heat the screen edge with a hair dryer (60–70°C) for 2-3 minutes to soften the glue.
3. Put a plastic blade on the screen, starting at the bottom, and be careful, the plume is fragile.
4. Unplug the battery plume (the black connector under the metal cover) to prevent short circuits.
5. Remove the metal cover covering the speaker (it is attached to 4 screws).
6. Unplug or disconnect the speaker connector (depending on the modification).
7. Install a new speaker, plug in the plume and assemble the phone in reverse order.

⚠️ Note: When disassembling the Redmi Note 9 Pro, it is easy to damage the fingerprint plume (it goes under the battery) or the flexible screen cable. If you are not sure about your skills, it is better to entrust the replacement to professionals - the error can cost you to repair the screen (from 5000 rubles).

After replacing the speaker, check its operation through the engineering menu (code # #36446337##). If the sound is still missing, the problem may be in the amplifier chip (it is located on the motherboard next to the speaker connector), its replacement requires professional equipment (sewer station, microscope) and costs 2500-4000 rubles.

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If the speaker is still sounding after the replacement, but it's quieter than it was before, check the tightness of the body. In the Redmi Note 9 Pro, the speaker uses the body as a resonator - if there are gaps, the sound will be muffled.

7. Alternative solutions: if repair is not possible

If the repair of the speaker is too expensive or spare parts are not available, you can use temporary solutions:

• 🎧 Use Bluetooth headphones: Modern TWS-Headphones (for example, Redmi Buds 3 Pro) will completely replace the phone’s speakers.
• 🔊 Connect the external speaker through USB-C or 3.5 mm adapter (if connector is available).
• 📱 Activate monosound: In accessibility settings (Settings) → Special opportunities → Sound. → Monoaudio) can redirect all sound to the bottom speaker.
• 🔄 Turn on vibration notifications: This will help keep calls from being missed even if the speaker isn't working.

If you're planning to sell a phone, honestly put the speaker in the malfunction announcement, which will reduce the price by 1,000 to 2,000 rubles, but will eliminate the claims of the buyer.

[Selling Xiaomi Redmi Note 9 Pro]


Condition: good, but the top speaker does not work (lower is serviceable, the sound is through headphones).




Perfect for repair or use with a Bluetooth headset.




Price: 8000 rubles (including malfunction).

FAQ: Frequent questions about speaker malfunction