The motherboard is one of the most important components of any electronic device. Damage to the motherboard could result for a variety of reasons. Replacing it may be the best option to get your Vivoactive back to running like new.

The Garmin team did a fantastic job backing a lot of punch into this tiny board, some of the most notable components are:

  • GPS and GLONASS antenna
  • Bluetooth antenna
  • Heartbeat Sensor antenna
  • Non-Volatile Flash Memory and RAM

If you're having problems with any of these components, you should consider following this replacement guide for a solution.

  1. Hold the the metal screwdriver, with a T5 Torx bit, in your dominant hand.
    • Hold the the metal screwdriver, with a T5 Torx bit, in your dominant hand.

    • Hold the rubber screwdriver, with a Hex T6 Torx bit, in your other hand.

    • While holding the rubber screwdriver in place, simultaneously unscrew the pin (counterclockwise) with the metal screwdriver in your dominant hand.

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  2. Once the 1mm screw is removed, reinsert  the metal screwdriver in that same hole.
    • Once the 1mm screw is removed, reinsert the metal screwdriver in that same hole.

    • Gently push the strap's pin out. It will begin to protrude from the other end.

    • Use your fingers to grab the exposed pin and slide it free. The strap should now be disconnected from the device.

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    • Place a heated iOpener over the display to loosen the adhesive.

    • After about a minute, the iOpener may be removed.

    • For more in depth instructions on using the iOpener, refer to the iOpener guide.

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    • Place the blue plastic opening tool in-between the screen and plastic casing of the watch and slowly pry up one side of the screen.

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    • Once the first side has come free, wedge the blue pick in between the screen and watch unit on that side.

    • Complete one pass around the perimeter of the screen to break the adhesive bond on all four sides.

    • Insert it a minimal distance to avoid damaging internal components.

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    • Use the blue plastic opening tool to pry up the side of the glass. Raise it to a point where your fingernail can fit in the gap.

    • Do the same on the opposite side of the device until you have a good grip of the screen.

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    • Obtain a careful grip of the screen from two of its sides.

    • Slowly lift the screen off of the case. Separate it just enough so as not to damage the connection to the motherboard.

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    • Detach the orange tab that connects the screen to the motherboard with a gentle uplift using a plastic opening tool.

    • Upon completing this step, the screen should be free from the rest of the device.

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    • Follow previous guides until you've exposed the battery as shown.

    • Begin by removing the battery connector tab.

    • Be sure not to use a metal implement or your fingers to remove this tab. Doing so may cause personal harm or damage to the electrical components.

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    • Use a plastic opening pick to gently pry out the battery as shown.

    • The battery is Lithium Polymer, follow safe handling procedures and DO NOT deform it upon removal.

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    • With the battery loose from the case, rotate it to expose the attached tab

    • Gently pry up the attached tab with a fingernail.

    • Keep the vibrator, circled in red, as you may need to solder it to the new battery upon re-installation later.

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    • Remove the four 2.4 mm screws with a PH00 Phillips head screwdriver.

    • Make an effort not to damage any nearby components of the motherboard with the screwdriver.

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    • Use the spudger to pry up the board from the case.

    • Insert the spudger a minimum distance beneath the board as there are components below.

    • Wiggle the exposed side of the board from each end until it comes free.

    • Use proper electrostatic discharge safety when removing and handling the board.

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    • Remove the GPS antenna by sliding it away from the board.

    • Keep track of the antenna and add it to the new board upon replacement.

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

2 other people completed this guide.

Tessa Gunnin

Member since: 10/01/2015

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Cal Poly, Team 1-21, Maness Fall 2015 Member of Cal Poly, Team 1-21, Maness Fall 2015


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Any tips on where to buy a motherboard?

Breener - Reply

Only <3 months, the motherboard is gone?

Do you have any service shop where I can mail for repairing? I am not going to mail order a motherboard and install by myself every 3 months.


Yong-Ming Yu - Reply

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