How to Open the Samsung Galaxy Watch4

Written By: Adriana Zwink

Comments: 16

Difficulty

Moderate

Steps

Time Required

5 - 10 minutes

Introduction

Use this guide to remove the back cover of the 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 Y00 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 -

Idk guys in my case the Y000 fit much better, the Y00 did turn the screws but felt like it will strip at any moment.

Adam Duda -

Ⓨ1.5 can also be used

coltman88 -

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 -

Is there a way to remove the casing without damaging this gasket?

Cove Shores -

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.

If there is then what do I do and also how do I know if it's damaged

Zev Kaff -

Conclusion

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

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

7 comments

the glass broke on the back of my watch 4 and i have managed to get all the shards and seal out without damaging anything, but I am having trouble finding remplacement glass for the sensor in canada

Champy Ton -

It just suddenly turned off and won't turn on it just vibrates in sequences, i don't know what to do.

Salim Juma -

I am having a real tough time unscrewing the screws despite having the right screwdriver. It is like they are stuck on.

Mishaal Jadunundon -

hello, I replaced the sensor but once I connect the flex cable to the motherboard it just doesn't work.
meaning that the sensor is not working (even no green light on the back) but the wireless charging is working.
I tried to disconnect and reconnect again but still no way to let the sensore work.
is there anything that must be reset softwarewise in order the watch can recognize the sensor?
Or probably the flex cable is not working properly?
thanks in advance

Daniele -

I am having the same exact issue. Did you ever find a solution?

Jasmine -

How do I get off a tiny stripped screw from the back of my galaxy 4 smartwatch?

Grace -

Hi Grace, sorry to hear about the stripped screw. Fortunately, we have a guide with some way to try to get the screw out. However, some of these tips might not work for screws of this size. Hope this helps!

Manuel Haeussermann -