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Garmin Fenix 3 HR Motherboard Replacement

Introduction

This guide will give you all the necessary steps to change your old motherboard for a new one.

What you need

  1. Garmin Fenix 3 HR Motherboard Replacement, Motherboard: step 1, image 1 of 2 Garmin Fenix 3 HR Motherboard Replacement, Motherboard: step 1, image 2 of 2

    • Remove the five 7mm screws with H1.3 hex screwdriver.

    Edit

  2. Garmin Fenix 3 HR Motherboard Replacement: step 2, image 1 of 2 Garmin Fenix 3 HR Motherboard Replacement: step 2, image 2 of 2

    • Use a plastic opening tool to remove the face of the device to expose the inner components.

    • There is one metal piece at the top of the face that is loose. This is the GPS antenna which will need to be removed as well.

    • Be careful of the ribbon that connects the motherboard to the display.

    Edit

  3. Garmin Fenix 3 HR Motherboard Replacement: step 3, image 1 of 1

    • Disconnect this ribbon from the motherboard using tweezers.

    Edit

  5. Garmin Fenix 3 HR Motherboard Replacement: step 4, image 1 of 2 Garmin Fenix 3 HR Motherboard Replacement: step 4, image 2 of 2

    • Using a T5 screwdriver, remove the two 5mm screws.

    • The motherboard should move freely.

    Edit

  6. Garmin Fenix 3 HR Motherboard Replacement: step 5, image 1 of 1

    • Another ribbon is attached from the underside of the motherboard. Disconnect this ribbon.

    Edit

  7. Garmin Fenix 3 HR Motherboard Replacement: step 6, image 1 of 1

    • Disconnect wires connecting battery to motherboard.

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  8. Garmin Fenix 3 HR Motherboard Replacement: step 7, image 1 of 1

    • The battery is glued to the motherboard and will need pried off with a nylon spudger.

    Edit

  9. Garmin Fenix 3 HR Motherboard Replacement: step 8, image 1 of 1

    • Now attach battery to new motherboard and reassemble.

    Edit
Conclusion

To reassemble your device, follow these instructions in reverse order.

5 other people completed this guide.

Author

with 2 other contributors

Jacob Smiley

Member since: 03/26/18

277 Reputation

1 Guide authored

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Team

IUPUI, Team S1-G6, Harley Spring 2018 Member of IUPUI, Team S1-G6, Harley Spring 2018

IUPUI-HARLEY-S18S1G6

3 Members

4 Guides authored

2 Comments

And where would one source replacement motherboard?

jonathan.hatchuel - Reply

donde puedo encontras placa.madre reeemplazo????

luis zavala - Reply

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