Now Reading: Samsung Galaxy A12 Screen Replacement Guide (A12 Nacho)
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Samsung Galaxy A12 Screen Replacement Guide (A12 Nacho)
Samsung Galaxy A12 Screen Replacement Guide (A12 Nacho)
If your Samsung Galaxy A12 or Galaxy A12 Nacho has a cracked screen, display flickering, touch issues, or no image at all, replacing the LCD screen is the best solution. Screen damage is common after drops or pressure, and continuing to use a damaged display can lead to further internal issues.
In this step-by-step guide, we’ll show you how to replace the LCD screen on the Samsung Galaxy A12 and Galaxy A12 Nacho (SM-A125 / SM-A127). This tutorial focuses on replacing the screen with frame, which is the safest, fastest, and most reliable option. Since both models share nearly identical internal layouts, the same steps apply to both devices.
Compatible Models
This repair guide based on the Samsung Galaxy A12 device, This guide works for the following models:
- Samsung Galaxy A12 (SM-A125)
- Samsung Galaxy A12 Nacho (SM-A127)
- Samsung Galaxy M12
- Samsung Galaxy F12
Compatible Mode Numbers | SM-A125F/DSN, SM-A125F/DS, SM-A125F, SM-A125M, SM-A125U, SM-A125U1, SM-A125N, SM-A125W, SM-A127F/DSN, SM-A127F/DS, SM-A127F, SM-A127M, SM-A127U, SM-F127G, SM-F127G/DS, SM-F127F, SM-F127F/DS, SM-M127F, SM-M127F/DSN, SM-M127N
Reasons to Replace the LCD Screen
You may need an LCD screen replacement if you experience:
- Cracked or shattered front glass
- No display or black screen
- Flickering or lines on the screen
- Touch not responding properly
- Display showing incorrect colors
- Screen damaged due to water or impact
Repair Difficulty
Repair Difficulty: ★★★★☆ (4/5)
Estimated Time: 60–90 minutes
Repair Type: LCD screen replacement (with frame)
Skill Level: Intermediate
This is a more involved repair that requires transferring multiple internal components to the new screen frame. Take your time and stay organized.
Before You Begin
Required Tools
- Heating pad / heat gun / hairdryer
- Suction cup
- Plastic card pry tools / opening picks / Tweezers
- Phillips screwdriver #0 / #00
- Adhesive (B7000 or double-sided back cover adhesive)
- Bonding clips or rubber bands (optional but recommended)
Make sure the device is turned off and the SIM tray is removed before starting.
How to Find Tools and Parts
- Heating pad – https://amzn.to/3H0tHzJ
- Portable Heat Gun – https://amzn.to/4mszih1
- Clamps https://amzn.to/3GYJT4w
- STREBITO 142 Piece Repair Tool Kit https://amzn.to/3UO1jUx
- Glue | Adhesive https://amzn.to/46exVxe
- Compatible Parts –
- Battery – https://amzn.to/4mum1VB
- Screen – https://amzn.to/4mQIxrC
- Other Parts – https://amzn.to/4fPvSmt
- Silicone Work Repair Mat https://amzn.to/45Emz5l
Protect Your Galaxy A12
- Protector For The Screen https://amzn.to/3JvKYBK
- Best Rated Case https://amzn.to/3HJ5Qoq
Samsung Galaxy A12 LCD Screen Replacement – Step-by-Step
Step 1: Power Off and Remove SIM Tray
Turn off the phone completely. Remove the SIM tray using a SIM eject tool.
Step 2: Remove the Back Cover
Create a small gap near the SIM slot or charging port using a card pry tool.
Slide the tool around the edges to release the plastic clips.
Important:
The fingerprint sensor is attached to the back cover—lift gently.
Step 3: Disconnect Battery and Fingerprint Sensor
Remove the six screws securing the logic board cover.
Disconnect the battery connector and fingerprint sensor connector.
Now the back cover assembly can be fully removed.
Step 4: Remove the Battery
Apply gentle heat to soften the battery adhesive.
Use a plastic card or pry tool to carefully loosen and lift the battery.
Step 5: Remove the Logic Board
Undo the logic board screw and disconnect the antenna cable.
Lift the logic board out of the frame carefully.
Step 6: Remove Upper Components
Apply light heat and remove the following components:
- Earpiece speaker
- Vibration motor
- Side button flex cable
Set them aside safely.
Step 7: Remove Bottom Components
Unscrew the seven screws securing the speaker cover.
Remove the speaker cover, then disconnect:
- LCD flex cable
- Antenna cable from the charging port board
Remove the charging port board and speaker buzzer from the frame.
Step 8: Prepare the New Screen Frame
At this point, only the broken screen frame remains.
Screen replacement options:
- Original service pack screen (with frame and buttons) – recommended
- Original screen without frame (harder, time-consuming)
- Refurbished or aftermarket screens (with or without frame)
For easier and safer repair, use a screen with frame and pre-installed buttons.
Step 9: Transfer Components to the New Frame
On the new screen frame, reinstall components in this order:
- Button flex cable
- Earpiece speaker
- Vibration motor
- Logic board (secure with screw)
- Battery (apply adhesive if needed)
Step 10: Reassemble the Bottom Section
Reconnect the main flex cable.
Install the speaker buzzer and charging port board.
Reconnect the LCD flex cable and antenna cable.
Secure the speaker cover using seven screws.
Step 11: Final Connections
Reconnect the battery and fingerprint sensor connectors.
Reinstall the logic board cover and secure it with six screws.
Step 12: Reinstall Back Cover and Test
Snap the back cover into place and press around the edges.
Reinsert the SIM tray and power on the phone.
Test display, touch, fingerprint sensor, speaker, microphone, and charging.
Frequently Asked Questions (FAQ)
Q: Does this guide work for Galaxy A12 Nacho?
A: Yes, it applies to both SM-A125 and SM-A127 models.
Q: Should I buy a screen with frame or without frame?
A: A screen with frame is strongly recommended—it saves time and reduces risk.
Q: Will replacing the LCD erase my data?
A: No, but backing up your data is always advised.
Q: Is this repair beginner-friendly?
A: It’s doable, but best suited for users with some repair experience.
Troubleshooting (After The Repair)
Q: Phone turns on but no display
A: Recheck the LCD flex cable connection on both ends.
Q: Touch not working after replacement
A: Ensure the screen connector is fully seated and not pinched.
Q: Fingerprint sensor not responding
A: Confirm the fingerprint flex cable is properly connected.
Q: No sound from earpiece or speaker
A: Verify that the earpiece, speaker buzzer, and antenna cables are correctly installed.
Q: Phone does not power on
A: Connect the charger and recheck the battery connector.
Final Notes
Replacing the LCD screen on the Samsung Galaxy A12 or A12 Nacho is a detailed but rewarding repair. Using a screen with frame makes the process safer and significantly easier. With careful handling and patience, you can restore your phone’s display and functionality without professional repair costs.
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