What to do if Xiaomi 6A It works, but the screen is black: from diagnostics to repairs

You have your own Xiaomi Redmi. 6A, And the screen stays black -- even though the phone vibrates when you press buttons, rings or even plays sounds -- is one of the most common problems with Xiaomi's budget smartphones from 2018 to 2019. 80 percent of the time, it's not the display itself, but software failures, connectors, or power controllers, but how to pinpoint the cause and bring the phone back to life without losing data or spending too much on the service?

In this article, we’ll look at all possible scenarios, from basic checks (which you can do in 5 minutes) to complex hardware malfunctions, and learn how to distinguish a software failure from a physical failure when the firmware helps and when you need a soldering iron. And also - a unique method of recovery through test mode. EDL, It works even when the screen is completely dead.

First, we check the obvious, and then we move on to a deep diagnosis.

1. Primary diagnosis: exclude simple causes

Before you take your phone apart or carry it to the service, make sure it's not the trivial stuff that's the problem. Here's a 5-point checklist that's worth checking first:

• 🔋 Charging and battery: connect your phone to another charger (preferably the original one from Xiaomi) 5V/2A). If the charging indicator is not burning, try to pinch the power button + Volume up on 20–30 Seconds – sometimes it resets the power controller.
• 🔄 Hard Reset: Press the Power Button + Volume up for 10 to 15 seconds until the phone vibrates. This will force the device to restart, bypassing OS failures.
• 🔌 Cable and connector: try connecting your phone to your PC via USB. If the computer makes the connection sound, but the screen remains black, the problem is more software.
• 📱 External damage: inspect the body for cracks, dents or traces of moisture. Even a slight deformation can disrupt the contact of the display plume.
• 🔊 Sound signals: call the phone from another device, and if you hear a bell or a vibration, it confirms that the phone is on, but the screen is not responding.

If the screen doesn't catch fire after this manipulation, we'll move on to a more advanced diagnosis, but first, an important warning:

⚠️ Attention! If the phone has fallen into water or been hit hard, don't try to turn it on again. A short circuit can completely disable the motherboard. In this case, immediately turn off the battery (if you have experience disassembling) or contact the service.

2. Software failures: when the firmware or OS is to blame

40% of Redmi black screens are on the screen 6A It is caused by system file corruption, update conflict or "bricking" after a failed firmware:

• 📱 Phone vibrates when buttons are pressed, but the screen does not respond.
• 🔊 Notification sounds (calls, SMS) reproduce normally.
• 💻 The computer defines the device as Qualcomm HS-USB Diagnostics 9008 (mode) EDL) Android ADB Interface.

If at least one of the points fits - try to restore the phone through recovery mode (Recovery) or firmware in the phone. EDL.

Method 1: Resetting through Recovery Mode

This is the safest method, but it will delete all the data from your phone, and if you have Mi Account sync enabled, contacts and some apps will recover after you log in.

1. Turn off the phone (press Power + Volume up for 10 seconds).
2. Squeeze the power. + Loudness up and hold until you feel vibration (usually 5-7 seconds).
3. Release the buttons – the phone should boot into Mi Recovery (if the screen is working, you’ll see the menu in English).
4. Use volume buttons for navigation and power for selection. Select Wipe Data → Wipe All Data.
5. Confirm the reset and wait for the reset.

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If your phone doesn't come into Recovery, try plugging it into a charger for 10 to 15 minutes before trying again, and sometimes a dead battery blocks access to the recovery menu.

If the reset did not help or the phone does not respond to the buttons – go to the firmware through the mode EDL.

Method 2: Firmware through EDL (power-user)

Emergency Download Mode Mode (EDL) It allows you to flash your phone even if it's completely dead:

• 💻 Windows computer 7/10/11.
• 🔌 Original. USB-cable (better from Xiaomi).
• 📁 Firmware for Redmi 6A (version V10.2.2.0.OCBMIXM or newer).
• 🛠 Tools: Mi Flash Tool, Qualcomm drivers.

Step-by-step:

1. Download and install the official firmware for Redmi 6A (Choose the Global or Russia Region).
2. Install Qualcomm drivers (can be found on the 4PDA or XDA Developers forums).
3. Turn off the phone and connect it to the PC, holding Volume up + Volume down (sometimes you need to close the test points on the board).
4. Launch the Mi Flash Tool, select the downloaded firmware and press Flash.
5. Wait for the process to finish (10-15 minutes) and the phone should automatically restart.

⚠️ Attention, firmware through EDL If the phone was enabled Mi Account protection, after firmware you will need to enter the username and password from the Xiaomi account, otherwise the device will be blocked!

3. Hardware malfunctions: what breaks down in Xiaomi 6A

If the software methods didn't work, the problem is the hardware. 6A There are a few common "diseases" that lead to a black screen:

The most common problem is the plume dump of the display. 6A The contacts oxidize or move away from the soldering tracks over time, and you can tell by the following symptoms:

• 📱 The screen sometimes flashes when you press the top of the phone.
• 🔍 Image appears partially (strips, with artifacts).
• 🔥 The phone is heated in the screen area.

If you suspect this particular malfunction, you can try to solder the plume yourself.

• 🔧 Dryer for soldering (power 300-500 W).
• 🧲 Flush and Flush (better acid-free).
• 🔍 Loupe or microscope (contacts are very small).
• 📱 New plume (cost) ~500 ₽ AliExpress).

4.Shooting Xiaomi Redmi 6A: step-by-step

If you decide to make a self-repair, first study the design of the phone.Redmi 6A It is relatively easy to understand, but there are a few pitfalls":

1. Remove the back cover, which is held on the latches. Use a plastic shoulder blade or mediator to gently fit the cover from the bottom edge (near the charging connector).
2. Turn off the battery: it's glued, but it has a connector. Never force the battery off, it could damage the board.
3. Disconnect the display plume, it's under metal protection. Carefully unscrew the 4 screws and raise the screen.
4. Check the contacts: often oxidation or contamination of the plume leads to a black screen.

If you find a bloated battery, you need to replace it. Using a phone with a bloated battery is dangerous: it can ignite when you charge.

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Before disassembling, take a picture of the location of all the plumes and screws. 6A screws of different lengths - if you mix up, you can damage the board!

5. Alternative recovery methods

If the standard methods didn’t work, try these non-obvious solutions:

Method 1: Connecting an external display

Many people don’t know, but Xiaomi Redmi 6A Supports the image display through USB-OTG (adapter-wise USB-C to HDMI). It'll help:

• 📺 Make sure the phone is working (if there is an image on the outside screen).
• 📁 Copy important data before resetting.
• ⚙ Set up your phone if the screen is partially faulty.

This will require:

1. adapter USB-C to HDMI (cost ~1 000 ₽).
2. TV or monitor HDMI-entrance.
3. On-line mode USB-Debugging (if it has been activated previously).

Method 2: Replace the screen with your own hands

If the display is physically damaged (cracks, broken pixels), it can be replaced yourself. 6A — 1,500 to 2,500 ₽ (depending on the quality).

Instructions for replacement:

1. Buy the original screen (check compatibility with the Redmi model) 6A).
2. Remove the old display by heating it with a hairdryer (temperature) ~60°C so as not to damage the fee).
3. Disconnect the plume and the battery.
4. Install a new screen, plug in the plume and check the operability before the final assembly.

⚠️ Attention! When changing the screen, don't press the motherboard, it can damage the chips. If the screen doesn't work after you change it, check if the plume is connected correctly and if there are no circuits.

6.When to contact the service: signs of serious breakdowns

Not all faults can be fixed at home. Please contact the service center if:

• 🔥 The phone is overheated even when it is off.
• 💥 There are traces of short circuit (blackened chips, the smell of burning).
• 🔌 The phone is not detected by the computer even in the mode EDL.
• 📱 After firmware, the screen is still black, but the phone makes sounds.

Average cost of repairs in the service (2026):

• 🔧 Diagnosis: 300-500 ₽.
• 🔄 Display plume replacement: 800–1,500 ₽.
• 🔋 Battery replacement: 600–1,200 ₽.
• 📱 Maintenance of the motherboard: from 2 000 ₽ (depending on the complexity).

When choosing a service, pay attention to:

• ⭐ Rating and reviews (check on Yandex.Maps or 2GIS).
• 🛠 Original spare parts for Xiaomi.
• 📄 Work guarantee (minimum 3 months).

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If the phone is warranty (even if it almost expires), first contact the official Xiaomi service.

7 Prevention: How to Avoid Black Screens in the Future

To prevent the problem from recurring, follow these recommendations:

• 🔋 Use original chargers (current no higher) 2A). Cheap cables can damage the power controller.
• 📱 Install only official firmware through the Mi Flash Tool. ROM-You often cause conflict.
• 💧 Avoid moisture. Even a little humidity can cause contact corrosion.
• 🔄 Regularly (every 3-6 months) reset your cache via Recovery (Wipe Cache).
• 🛡 Install a case with depreciation - this will reduce the risk of damage to the plume when falling.

It is also useful to include backup in Settings. → System system → Backup. This will allow you to recover data even after a hard reset.

FAQ: Frequent questions about the black screen on Xiaomi 6A