Now Reading: POCO X3 NFC Power Fingerprint Sensor Flex Replacement Guide (X3 Pro | X3)
-
01
POCO X3 NFC Power Fingerprint Sensor Flex Replacement Guide (X3 Pro | X3)
POCO X3 NFC Power Fingerprint Sensor Flex Replacement Guide (X3 Pro | X3)
If the power button or fingerprint sensor on your Xiaomi Poco X3, Poco X3 NFC, or Poco X3 Pro is not responding, works intermittently, or has stopped working completely, the power & fingerprint sensor flex cable is likely faulty.
On the Poco X3 series, the power button and fingerprint sensor are combined into a single flex cable, making replacement a modular and repair-friendly process. This guide will show you how to replace the power & fingerprint sensor flex step by step, and the procedure is compatible with Poco X3, X3 NFC, and X3 Pro due to their similar internal design.
Repair Overview
- Compatible Models: Xiaomi Poco X3, Poco X3 NFC, Poco X3 Pro
- Repair Type: Power Button & Fingerprint Sensor Flex Replacement
- Repair Difficulty: ⚠️⚠️ Medium
- Time Required: 25–40 minutes
- Risk Level: Low to Moderate
Reasons to Replace the Poco X3 Power & Fingerprint Sensor Flex
- Power button not working or stuck
- Fingerprint sensor not responding
- Phone cannot wake or lock properly
- Intermittent power or fingerprint detection
- Physical damage or liquid exposure
Before You Begin
Compatibility and Model Numbers
- POCO X3 NFC
- POCO X3
- POCO X3 Pro
Model Numbers : MZB07Z0IN, MZB07Z1IN, MZB07Z2IN, MZB07Z3IN, MZB07Z4IN, MZB9965IN, M2007J20CI, M2007J20CG, M2007J20CT, M2102J20SG, M2102J20SI
Tools Required
- Mobile phone heating pad or hairdryer/heat gun
- Plastic pry tool / card pry
- Suction cups
- Phillips #00/#000 screwdrivers
- Tweezers (for connectors)
- B7000 glue or double-sided adhesive (for back cover)
- Rubber bands or bonding clips to secure the back cover
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/3HR26Bi
- Screen – https://amzn.to/4mZPXsI
- Other Parts – https://amzn.to/3HR26Bi
- Silicone Work Repair Mat https://amzn.to/45Emz5l
Protect Your Poco X3 Series
- Protector For The Screen https://amzn.to/4gdWWw9
- Best Rated Case https://amzn.to/4fPcV3e
Step-by-Step Power & Fingerprint Sensor Replacement Guide
Step 1: Power Off and Open the Device
Power off the phone completely. Heat gently around the back cover edges to soften the adhesive.
- Place the back cover side on a heating pad and select the mobile heating option
- Alternatively, use a heat gun or hairdryer
Create an opening with a suction cup and slide a plastic pry tool around the edges. Carefully remove the back cover.
Step 2: Remove the Board Frame
Undo 11 Phillips screws securing the board frame. Lift and remove the frame carefully.
Step 3: Disconnect the Battery
Unplug the battery connector on the left-hand side to prevent short circuits.
Step 4: Remove the Faulty Power & Fingerprint Sensor Flex
Carefully disconnect and remove the power & fingerprint sensor flex cable from the side frame. Take note of its routing to ensure correct installation of the new part.
Step 5: Install the New Power & Fingerprint Sensor Flex
Place the new power & fingerprint sensor flex cable into position, ensuring it sits properly in the frame and aligns with the power button opening.
Step 6: Reinstall the Board Frame
Reconnect the necessary connectors if removed, then place the board frame back into position and secure it with 11 screws.
Step 7: Reconnect Battery and Close the Device
Reconnect the battery connector. Before sealing the phone, it’s recommended to briefly power it on to test the power button and fingerprint sensor.
Step 8: Seal the Back Cover
Ensure the back cover has enough adhesive. If not, apply B7000 glue or a new double-sided adhesive.
Press the back cover firmly and use binding clips or rubber bands to hold it in place for several minutes.
Frequently Asked Questions (FAQ)
Q: Is the power button and fingerprint sensor one part?
A: Yes. On the Poco X3 series, both functions are combined into a single flex cable.
Q: Is this guide compatible with Poco X3 Pro and X3 NFC?
A: Yes. The repair steps are the same across all Poco X3 models.
Q: Will replacing this flex affect my data?
A: No, but backing up your data before repair is always recommended.
Troubleshooting (After The Repair)
Q: Fingerprint sensor not working after replacement
A: Ensure the flex cable connector is fully seated and restart the device.
Q: Power button still not responding
A: Check alignment of the flex cable and confirm the replacement part is working.
Q: Phone does not power on
A: Recheck the battery connector and inspect the flex connection.
Final Notes
Replacing the power & fingerprint sensor flex on the Xiaomi Poco X3 series is a straightforward DIY repair that restores both power button and fingerprint functionality without soldering. Always test the device before sealing the back cover.
Related
