Xiaomi Redmi Note 8 Pro is one of the most popular smartphones in the budget segment, released in 2019. Despite the strength of the case, over time, owners may need to disassemble the device to replace the battery, repair the display or clean the dust. However, disassembly of this device has its nuances: glue fixation of the rear cover, fragile plumes and the risk of damage. FPC-connectors.
In this article, you will find a step-by-step guide with photos of key steps, a list of tools you need, and unique warnings about typical errors that cause your phone to fail, and how to avoid damaging the fingerprint scanner (built into the power button) and what to do if the smartphone doesn’t turn on after disassembly.
Preparation for disassembly: tools and security measures
Before you start disassembling the Redmi Note 8 Pro, make sure you have everything you need. Using the wrong tools is the main cause of damage to the body or internal components. For example, metal mediators can leave scratches on the aluminum frame, and too thick plastic blades can break the latches of the rear cover.
Here is the minimum set of tools you will need:
- 🔧 Set of screwdrivers (cross-haul) PH00, flat 1.5 Mm, five-point Torx. T3/T4 screw-cover)
- 📱 Plastic mediators (thickness 0.1-0.2 mm) or specialized suction cups for smartphones
- 🔥 Hair dryer or thermo-air station (for softening glue, temperature 60-80)°C)
- 🧲 Magnetic mat or screw container (so as not to lose small details)
- 🔋 Multimeter (to check battery voltage before shutdown)
Important: if you are disassembling a phone to replace the battery, do not use metal tools to tamper with the battery - this can lead to a short circuit.
⚠️ Warning: Do not heat the body with a hairdryer for longer than 2-3 minutes in a row - this can damage OLED-matrix (in models with AMOLED-Or melt plastic latches. Optimal mode: heat up 30 seconds, then try to separate the lid.
Step 1: Removing the back cover - how not to break the latches
The back cover of the Redmi Note 8 Pro is attached to glue and plastic latches. The main challenge is to heat the glue evenly around the perimeter without overheating the individual areas. Start at the edges of the body, gradually moving the hair dryer around the circle. Temperature should be sufficient to make the glue elastic, but not scalding (optimally 70°C).
Removal algorithm:
- Turn off the phone and remove it. SIM-map.
- Plug on the screen a protective film (so as not to scratch the glass with a mediator).
- Heat the bottom of the case (where the USB-C connector is located) for 30 to 40 seconds.
- Insert a plastic mediator into the gap between the lid and the frame and carefully lead along the edge, separating the glue.
A typical mistake is to try to tear the lid off by force after heating only one section, which results in a break in the fingerprint scanner plume (which passes under the power button) or damage to the antenna contacts. If the lid fails, heat it up again and use the second suction cup to lift it evenly.
Is the phone off the grid?
Whether removed SIM-memory-card?
Is there a protective film on the screen?
Are plastic mediators and hair dryers ready?
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Step 2: Shutting down the battery – why it’s critical
After removing the back cover, the first thing you need to do is turn off the battery. In the Redmi Note 8 Pro, the battery is connected via a battery. JST-connector (white connector on the motherboard) Use a plastic blade to gently lift the connector lock up, then pull the plume out.
Never force the plumes to disconnect, which causes contacts to break or damage the circuit board tracks. If the connector fails, check if it is fixed with extra glue (found in the 2020 audits), in which case, gently apply the glue with a nail or a wooden stick.
Warning: If you disassemble a phone with a discharged battery (voltage below 3.5V), connect it to charging for 5-10 minutes before turning it off.
| Component | Risk of incorrect disconnection | How to avoid |
|---|---|---|
| Battery | Short circuit, bloating. | Use a plastic tool, do not pierce the battery |
| Display plume | Contact break, artifacts on screen | Disconnect only after removing the metal screen |
| Fingerprint scanner | Loss of power button functionality | Do not pull the plume, but carefully lift the connector. |
Step 3: Extracting the motherboard – the complexity and nuances
The Redmi Note 8 Pro motherboard is mounted on 12 different sized screws (Torx T3 and T4). It is important to remember their location - when assembling screws of different lengths, you can not confuse places! For example, too long a screw in the camera area can damage the touch module.
Charge recovery procedure:
- Disconnect all the plumes: display, camera, speaker, vibrator.
- Twisted the screws starting at the corners (they are usually longer).
- Carefully raise the fee with a plastic blade, starting from the top edge (where the connectors are located).
Difficulty: In some revisions, the board is glued to the heat sink, and if it doesn't separate, don't force it, heat the area with a hair dryer (60°C maximum) and try again. Also, look at the gyroscope (located next to the top chamber) -- it's easy to damage if you don't pick up the board carefully.
What to do if the fee is not disconnected?
Step 4: Disassemble the front panel - screen and buttons
Display Redmi Note 8 Pro glued to the frame using double-sided tape (in models with a IPS-matrix) or liquid adhesive (in AMOLED-It's going to require heating and tidy slacking, and start at the bottom edge where the plume is.
Important: before removing the screen, turn off the battery plume (if it was connected back), power to the display during disassembly can cause damage. LED-lighting or sensory layer.
Typical problems when disassembling the screen:
- 🔧 Artifacts on the display after assembly - usually caused by contamination or damage to the plume. Blow the connector with compressed air before connecting.
- 📱 The sensor is not working, so check if the plume is compressed when assembled. In the Redmi Note 8 Pro, it passes under a metal frame.
- 🔋 Volume/power buttons are triggered – the cause may be a lost silicone pad or improper installation of a metal frame.
⚠️ Warning: If you're replacing the display, make sure the new matrix has the same revision as the original.Redmi Note 8 Pro features screens from different manufacturers (BOE, Tianma), and mismatch can lead to color reproduction or autobrightness problems.
Step 5: Replacing the battery – how not to damage the controller
The battery in the Redmi Note 8 Pro has a capacity of 4500 mAh and is glued to the body.
- Disconnect the battery plume (as described in Step 2).
- Push the battery with a plastic blade, starting at the top edge (where there are no board elements).
- If the battery is swelling, don't puncture it, it can cause fire. Use a special glue solvent or heat.
Critical: the new battery must be the same model (e.g. BM47 or BM48 for different revisions) and using a battery from another model (e.g. Redmi Note 8) will lead to incorrect operation of the charge controller and rapid degradation.
After installing the new battery:
- Check the voltage with a multimeter (should be ~3.8V).
- Connect your phone to charging and make sure it detects the battery (in Settings → Battery Status).
- Calibrate: completely discharge and charge the phone 2-3 times.
Frequent Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when disassembling the Redmi Note 8 Pro. Here are the most common of them and ways to prevent them:
- The fingerprint scanner plume breaks when the back cover is not removed neatly, so heat up the area around the power button and use two suction cups to lift evenly.
- Damage. FPC-So, the solution is to always push the connectors on the motherboard with a plastic blade.
- Loss of screws – Redmi Note 8 Pro has screws of different lengths (3.5 mm and 5 mm).Solution: spread them in order on a magnetic mat.
- Overheating the case when you remove the lid, you deform the plastic latches, so you can heat it up for no more than 30 seconds in one approach.
If the phone does not turn on after assembly, check:
- 🔌 Connecting the battery plume and display.
- 🔧 Correct installation of screws (should not be superfluous or missing).
- 📱 The state of the power button (sometimes it is dropped due to improper assembly).