Skip to main content

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.

  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.

  3. Garmin Fenix 3 HR Motherboard Replacement: step 3, image 1 of 1
    • Disconnect this ribbon from the motherboard using tweezers.

  4. 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.

  5. 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.

  6. Garmin Fenix 3 HR Motherboard Replacement: step 6, image 1 of 1
    • Disconnect wires connecting battery to motherboard.

  7. 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.

  8. Garmin Fenix 3 HR Motherboard Replacement: step 8, image 1 of 1
    • Now attach battery to new motherboard and reassemble.

Conclusion

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

5 other people completed this guide.

Jacob Smiley

Member since: 03/26/2018

277 Reputation

1 Guide authored

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

Add Comment

View Statistics:

Past 24 Hours: 0

Past 7 Days: 6

Past 30 Days: 33

All Time: 4,332