Samsung Galaxy Watch4 Motherboard Replacement

Written By: Adriana Zwink

Comments: 6

Samsung Galaxy Watch4 Motherboard Replacement

Difficulty

Moderate

Steps

Time Required

10 - 20 minutes

Introduction

Use this guide to replace the motherboard on your Samsung Galaxy Watch4.

Tools

Step 1

Before starting repairs, take your watch off the charger and power it down.
Remove the watch band.

Step 2

Use a Tri-point Y000 screwdriver to remove the four 4.0 mm-long screws.

The correct tool to use here is a tri-point Y00 screwdriver.

David C -

What if 2 won't come out?

Sharon Shelton -

Yes this step needs to be edited as the correct tool is y00 not y000. I think I stopped my brand new y000 before I figured it out.

Ryan Stokes -

Definitely 00

Andrew -

Step 3

Insert an opening tool into the seam between the back cover and the metal housing.
Twist the opening tool to create a gap.
Don't try to remove the back cover all the way yet. The sensor flex cable is still connected to the motherboard.

That isn't glue holding the cover in place. That is the rubber gasket used to waterproof the device. It WILL get damaged and you WILL have to replace it.

David C -

Step 4

Lay the watch face down.
Carefully swing open the back cover by folding the back cover to the opposite site of the created gap.
Use the flat end of a spudger to pry up and disconnect the sensor flex cable from the motherboard.

Step 5

Remove the back cover.
Make sure the rubber gasket is undamaged. If damaged, replace it with a new one during reassembly to maintain proper water resistance.

Step 6

Use a Phillips screwdriver to remove the 4.4 mm-long screw securing the motherboard.

Step 7

Use the flat end of a spudger to disconnect the display flex cable.

on watch 4 classic variants there is an additional small connector to the left of the display connector for the rotating dial that will have to be disconnected

Erik Port -