How to disassemble Xiaomi Redmi 8: detailed instructions with photos and nuances

Xiaomi Redmi 8 is one of the most popular budget smartphones of 2019, but even it is not immune to breakdowns. The screen does not respond to touch, the battery is swollen, the speaker stopped working or the charging connector needs to be replaced? In most cases, repair is cheaper than buying a new device. However, before carrying the phone to the service center, many users wonder: can you disassemble the Redmi 8 yourself?

The answer is yes, but with reservations. Smartphone design is not the most complicated, but requires care and the right tools. In this article, we will take a closer look at the disassembly process, show you what mounts and parts are found inside, and warn you of common mistakes that can turn simple repairs into expensive. If you've never taken a smartphone apart before, don't worry: our guide is designed for beginners and contains all the necessary parts.

Preparation for disassembly: tools and security measures

Before you start, make sure you have everything you need, and without the right tools, you risk damaging the case, the plumes, or even the motherboard, and here's the minimum kit you'll need:

• 🔧 Plastic blades (2-3 (a) - for the careful liding and disconnection of the plumes.
• ⚒️ Screwdriver cross (PH00) — for the screws of the case and motherboard.
• 🔥 Hair dryer or thermal air station - to soften the glue under the back cover.
• 🧲 Magnetic mat or container – to avoid losing small screws.
• 📸 Smartphone for photography – capture each step so as not to confuse details during assembly.

Also, prepare your desk: clean, well-lit, and without static electricity (ideally an antistatic mat) and don't take your smartphone apart on a carpet or couch: small parts are easily lost, and static electricity can damage the motherboard.

⚠️ Warning: If the battery is swelling, don't try to disassemble the phone without protection! Use gloves and glasses: Lithium-ion batteries can ignite if damaged.

Before disassembly it is necessary:

Turn off your smartphone and remove it. SIM-memory-card|Charge the battery to 30-50% (fully discharged or charged on 100% battery)|Make a backup of the data (disassembly may result in resetting settings)|Prepare a container for screws (for example, divide them by size)-->

Removal of the back cover: how not to damage the body

The back cover of the Redmi 8 is attached to the glue, so you can't just shovel it with a blade. If you pull it too hard, the body can crack. Here's a step-by-step algorithm.

1. Heat the back cover with a hair dryer (temperature ~60-70°C) for 2-3 minutes, evenly driving around the perimeter. This will soften the glue.
2. Insert a plastic blade into the gap between the lid and the frame (start at the bottom edge where the charging connector is). Carefully drive the blade along the body, gradually detaching the lid.
3. If the lid doesn't lend itself, warm up the problem area again. Don't use metal tools, they'll scratch the plastic.

After removing the cover, you will see:

• 🔋 Battery (stick to the body).
• 📱 Motherboard (fixed with screws).
• 🎵 Dynamic and vibrator (lower part).
• 📶 Antenna contacts (thin metal strips at the edges).

⚠️ Attention: Don't pull the lid too hard, because there are plumes of fingerprint scanners and cameras underneath!

If the glue is too strong, you can use isopropyl alcohol (90%+): apply a few drops around the perimeter of the lid, wait 1-2 minutes and try again. Alcohol dissolves the glue, but does not damage the plastic.

Yes, many times.|1-2 tried|No, it's my first experience.|I prefer to give it to the service.-->

Battery shutdown: Why it's critical

Before you touch the motherboard or plumes, be sure to turn off the battery. Otherwise, you risk:

• 🔌 Short circuit (if you accidentally touch the contacts with a screwdriver).
• 💥 Damage to the power controller (if the battery is not fully discharged).
• 📵 Data loss (if the phone suddenly turns on during disassembly).

To turn off the battery:

1. Find the battery plume (a thin black wire with a connector running from the battery to the motherboard).
2. Carefully put the jack on a plastic spatula.
3. Check with a multimeter that there is no voltage on the battery contacts (optional, but recommended).

If the battery is swelling, it can't be disconnected in the normal way.

Removal of motherboard and plumes

The Redmi 8 motherboard is mounted on 8-10 screws (depending on the modification) and must be twisted with a PH00 cross screwdriver, but beware: some screws may be of different lengths. Remember which screw is twisted from where, or take a picture of their location.

After the screws are removed:

1. Carefully raise the board on one side. Don't pull it too hard, plumes may be glued down the bottom.
2. Disconnect all the plumes (display, cameras, fingerprint scanner, power buttons) and then put a plastic blade on the connectors.
3. If the plume doesn't detach, don't use force. It may be locked by a latch. Carefully inspect the connector.

Typical problems in collecting fees:

Once the board is removed, inspect it for damage: blackened areas (a sign of overheating), oxidized contacts (green coating), or cracks. If there are any, you may need a soldering station for repair.

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If you are disassembling the Redmi 8 because of a charging problem, first check the USB-Type C connector. Often it oxidizes or departs from the board. It can be soldered on its own or replaced (price ~200-500 rubles).

Replacement of the screen module: nuances and pitfalls

The Redmi 8 screen is one of the most vulnerable parts, and if the display cracks or stops responding to touch, it can be replaced by itself.

• 🔄 The screen and touchscreen in Redmi 8 are a single module. You can't replace only the glass (you need to change everything completely).
• 💰 The cost of a new screen: ~2,500-4000 rubles (depending on quality) Original parts are rare.
• 🔧 Replacement will require disconnecting the display plume, battery and front camera.

Procedure:

1. Remove the back cover (as described above).
2. Turn off the battery.
3. Warm up the edge of the screen (temperature) with a hairdryer ~50°C) and gently tuck it with a plastic blade, the screen glued around the perimeter.
4. Disconnect the display plume from the motherboard.
5. Install a new screen, plug in the plume and check the operability before the final assembly.

⚠️ Warning: If after changing the screen, there are stripes, flickering or broken zones, check if the plume fits tightly. Often the problem is solved by reconnecting.

If the screen is working but the touchscreen is not responding, the sensor controller on the motherboard may be damaged, and this will require a diagnosis at the service center.

Redmi 8 Frequent Breakdowns and How to Fix Them

The Redmi 8 is a reliable smartphone, but it has typical "diseases": Here are the most common problems and ways to solve them:

If the problem is software (for example, the smartphone is glitching or not turning on), try resetting the settings via Recovery Mode:

1. Turn off the phone.


2. Press the + buttons for 10 seconds.




3. From the menu, select "Wipe Data" → "Yes".




4. Reset the device.

If this does not help, you may need to flash through Fastboot or replace the motherboard.

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Most of the hardware problems of the Redmi 8 (except for damage to the board) can be fixed by yourself with tools and patience.

Building a phone: how to avoid mistakes

Putting the Redmi 8 back together is often harder than disassembling, and here are the key points to look out for:

• 🔩 The screws must be twisted with moderate force. The twisted screws can damage the board.
• 🔌 The plumes must be tightly inserted into the connectors. If the plume is dangling, check the lock.
• 🔋 The battery should be flat, without skewing. If it's swelling, replace it before assembly.
• 📲 The screen should be adjacent to the body without gaps. If there are gaps, warm up the glue with a hair dryer and press it.

Assembly order:

1. Set the motherboard and twist the screws.
2. Connect all the plumes (start with the battery, then the display, camera, fingerprint scanner).
3. Lay the battery and fix it with glue (you can use double-sided tape).
4. Stick the back cover. To be reliable, warm it up with a hair dryer after you stick it.
5. Check the health: turn on the phone, test the touchscreen, cameras, speaker and charging.

If something doesn’t work after the assembly:

• 🔍 Check if all the plumes are connected.
• 🔧 Make sure the screws are not pulled over (this may cause a short circuit).
• 📱 Reset the settings to factory (possibly lost software).

⚠️ Warning: If the phone doesn't turn on after assembly, but the indicator is on when you connect to charging, the problem is the power button or its plume. If the indicator is not on, check the battery and the charging controller.

FAQ: Answers to Frequent Questions