What to do if the screen on Xiaomi Redmi does not work 7A: diagnostics and repairs

Xiaomi Redmi screen 7A Does it stop responding to touch, shows bands, blinks or doesn't turn on at all? This problem is familiar to many owners of budget smartphones, especially after falls, moisture or prolonged use. 7A It's not protected by the latest generation of gorilla glass, and its plumes wear out over time, but don't rush to bring the phone to service, because in 60 percent of cases, you can fix the malfunction yourself.

In this article, we will look at all possible causes, from software failures to physical damage, and give step-by-step instructions for diagnosis and repair, and learn how to distinguish between matrix damage and plume failure when a simple reboot helps and when a soldering iron is needed. We will pay special attention to the typical mistakes in the dismantling of Redmi. 7A, which may aggravate the problem.

Diagnosis: Why is the screen not working?

Before you start repairs, you need to pinpoint the cause of the malfunction. - Xiaomi Redmi screen 7A It may not work for several reasons:

• 🔄 Software failure – the phone turns on (vibrates, makes sounds), but the screen remains black or hovers on the logo MIUI.
• ⚡ Discharged battery – if the battery is completely sat down, the smartphone may not show signs of life even when connecting charging.
• 💧 Moisture infestation – oxidation of contacts on the plume or board leads to flickering of the screen or its complete failure.
• 🪨 Mechanical damage – cracks in glass, damage to the matrix or disconnection of the plume after falling.
• 🔌 Failure of the plume – wear or break of the flexible cable connecting the display to the motherboard.
• 🔥 Overheating or short circuit – often occurs after using non-original chargers.

To narrow down the range of possible problems, do a simple check:

1. Connect your phone to charging and pay attention to the indicator (if it’s on – the battery is charging, if not – the problem may be in the port or battery).
2. Try to press the power button + Volume increase for 10-15 seconds – this will force the device to restart.
3. Call your phone from another device: if you hear the call sound, but the screen does not respond, the problem is exactly in the display or plume.

If the screen has not worked after this manipulation, move on to the next section. Importantly, do not try to disassemble the phone if it has recently fallen into water - you need to dry it first (more on this below).

2. Software failures: how to bring the screen back to life without disassembly

30% of Redmi screens 7A It doesn't work because of software errors, not because of physical failures:

• 🐞 System freeze after update MIUI.
• 📱 Application conflict blocking the graphical interface.
• 🔄 Failed resetting of settings through Recovery.

Try the following methods (in order of increasing difficulty):

Forced reset

Press the power button combination + 15 to 20 seconds increase in volume. If the phone vibrates and reboots, the problem was a temporary failure. If there is no response, move on to the next step.

Entering Recovery Mode

For resetting settings to factory:

1. Turn off the phone (if it doesn’t respond, wait until the battery is completely discharged).
2. Press the power button. + Increase the volume before the logo appears MIUI.
3. In the Recovery menu, select Wipe Data → Wipe All Data (manage by volume buttons, confirm by power button).

⚠️ Warning: This method will remove all data from your phone, including photos and contacts. If the screen is unresponsive but the phone is turning on, try connecting to your PC via a computer. ADB backup.

2.3 Fastboot flashing

If the reset didn't work, we'll have to reinstall the firmware.

1. Download the official firmware for Redmi 7A (codename pine from Xiaomi website.
2. Install Mi Flash Tool on PC and connect your phone in Fastboot mode (clamp power) + volume-reducing).
3. Follow the instructions of the program for installing the firmware.

Download firmware for the pine model|Install Qualcomm drivers|Disable the antivirus|Charge your phone at least 50 times%|Prepare original USB-cable

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If after flashing the screen still does not work - the problem is precisely in the hardware.

Mechanical damage: cracks, falls, moisture

Xiaomi Redmi 7A does not have standard certification IP68, So even a little moisture can knock the screen out:

3.1 Phone fall

If the screen cracks or colored stripes appear, the matrix or plume is most likely damaged, and the corners of the display are especially vulnerable - when hit, microcracks often form there, which diverge over time.

What to do:

• 🛠️ If cracks are only on the glass, and the image is normal, you can limit yourself to replacing the glass (cost) ~1 500 ₽).
• 🔧 If there are artifacts (stripes, flickering) - you will need to replace the entire display module (from 2,500). ₽).
• 🚫 Do not use a phone with a cracked screen – shrapnel can damage your hands and moisture will penetrate inside.

Moisture intrusion

If Redmi 7A fell into the water or fell in the rain:

1. Turn off your phone immediately (don’t press the buttons!).
2. Extract. SIM-memory-card.
3. Wet your phone with a napkin, but don't shake it.
4. Place the device in a silica gel (or rice) bag for 24 to 48 hours.
5. Do not turn on your phone until you make sure it is completely dry.

⚠️ Note: if after drying the screen did not work, do not try to disassemble the phone yourself - oxidized contacts require professional cleaning with alcohol or ultrasound.

3.3. disconnection of the plume

If the Redmi screen 7A It flashes, it fades periodically, or it reacts to late touches, and it could be a display plume, and it's a thin, flexible cable that connects the matrix to the motherboard, and it wears out or moves away from the connector over time.

Diagnosis:

• Try to press slightly on the top of the screen (from the front camera side), if the image appears, the plume has moved away.
• Spin the phone in your hands – if the screen flickers when the angle changes, this confirms the plume problem.

Solution: you will need to disassemble the phone and reconnect the plume or replace it (cost) ~1 000 ₽).

4. Self-repair: disassembly and replacement of the screen

If you want to replace the Redmi screen 7A You will need it yourself:

• 🔧 Screwdriver Set (Phillips #00, Y00, plastic mediator).
• 🔥 Hair dryer or thermo-air station for softening glue.
• 📱 New display module (choose with pre-painted glass).
• 🧴 Clay. B-7000 or double-sided tape for fixation.

Step-by-step:

1. Turn off the phone and remove the tray for SIM-map.
2. Heat the back cover with a hair dryer (temperature) ~60°C) and gently apply a plastic mediator to it.
3. Unscrew 10 screws fixing the metal plate and remove it.
4. Unplug the battery (don't tear the plume!), then turn off the display connector.
5. Heat the screen around the perimeter and separate it from the body.
6. Install a new display, plug in the plume and assemble the phone in reverse order.

💡

Before assembly, check the new screen by connecting it to the board without fixing, which will avoid re-disassembly if the module is defective.

⚠️ Attention: when disassembling Redmi 7A It's easy to damage the fingerprint scanner plume (it goes under the battery) If the sensor doesn't work after assembly, check it's connected.

5. When do you contact the service?

Not all breakdowns can be repaired by yourself. Contact the service center if:

• 🔧 After replacing the screen, new problems appeared (the touchscreen, the proximity sensor does not work).
• 💻 The phone is not detected by the computer in Fastboot mode.
• 🔥 On the board, traces of burns or bloated capacitors are visible.
• 💧 After getting moisture, it took more than 48 hours, but the screen does not work.

The cost of repair in the service depends on the type of breakdown:

• Glass replacement – 1,500–2,000 ₽.
• Replacement of the display module – 2,500–3,500 ₽.
• Repair of the plume - 1,000-1,800 ₽.
• Cleaning from oxidation - 1,500-2,500 ₽.
• Replacement of motherboard - 5,000 ₽ higher.

💡

If the phone is warranty, do not disassemble it yourself - this will void warranty obligations. Contact the official Xiaomi service (the list of centers is available on the website mi.com).

When choosing a service, pay attention to:

• 📋 Availability of a license for electronic repair.
• 🔧 Use of original parts (ask for a certificate for display).
• ⏱️ Repair time (on average 1-3 days).
• 💰 Work guarantee (minimum 3 months).

Prevention: How to prolong the life of the screen?

To avoid problems with the Redmi screen 7A, follow these recommendations:

• 🛡️ Use tempered glass and case with shock-absorbing corners.
• 🚿 Avoid moisture – even steam in the bathroom can cause oxidation.
• 🔋 Do not use your phone while charging (overheating accelerates the wear of the plume).
• 📵 Do not put the smartphone screen down on hard surfaces.
• 🔄 Update regularly MIUI — In new versions, errors that cause hangings are corrected.

If you drop your phone frequently, consider insurance (e.g. from Sberbank or Alfastrakhovanie). ₽ a year, but it will cover screen repairs in case of mechanical damage.

FAQ: Frequent questions about the screen Xiaomi Redmi 7A