Einleitung
Even the best electronics die out over time, especially devices used in harsh conditions. This guide will show how to replace the motherboard of your Garmin Fenix 3 if the electronics are showing signs of failure. You will need a T6 Torx screwdriver, a T5 Torx screwdriver, and a spudger.
Was du brauchst
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Use a T6 screwdriver to remove the five 1.7 mm screws from the watch face.
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Use a spudger to lift up and free the screen ribbon cable's press-fit connector from the motherboard.
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Set the watch face aside.
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In diesem Schritt verwendetes Werkzeug:Tweezers$4.99
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Locate the two silver 1.4 mm T5 screws, and carefully unscrew them.
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Lift the watch and turn it over one hand. The motherboard should fall out easily.
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Using the spudger, separate the motherboard from the battery, which are both held together with a mild adhesive.
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Motherboard without metal cover
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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Appalachian State University, Team S1-G3, Menagarishvili Fall 2018 Mitglied von Appalachian State University, Team S1-G3, Menagarishvili Fall 2018
APSU-MENAGARISHVILI-F18S1G3
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18 Kommentare
Hello,
i’m looking for replacement of start/stop button micro switch. Do you know what is the switch number which i can look for?
Thank you
that's my problem too and i can't find any solution.
Where can I find a replacement Motherboard ? None of my buttons are responding and I can’t even do a Factory reset.
All that works is switching off and back on.
I have exact same issue. I sent my watch to official repair service to Split (Croatia) and they said they aren’t able to fix it. I can see only main screen of the watch, buttons don’t respond at all. Would like to know how to fix the issue.
In Italy it’s the same story… impossible to repair ( button START/STOP does not function ).
I’m searching on eBay for a USED low cost Fenix 3 for change motherboard…
At the moment is the unic solutions…
Matteo, this is not the only solution!I’ve bought on ebay the START/STOP button, i’ve just to solder it.
I’m , like you, living in italy. The button comes from Russia, you can find on ebay for about 10 euros shipped =)
My buttons are totally broken, seems restart of system works, but when it is on I cannot switch anything. It seems like broken electronics, not really buttons. Any ideas about how to proceed in low-cost mode? Thanks!
did you ever find a solution to this issue as i am having the exact same problem
I have a Garmin Fenix 3 HR and I have problems both with GPS (any signal more) and HR monitor (erratica data both with or without HRM Tri-band). Do you think that could be a motherboard problem? Where can I buy spare parts for my garmin?
Thanks
i’m not sure whether i need the motherboard or the display …. i do know that my watch will not power on and prior to that happening the display was hard to see
I am having the same issue too - hard reset will work via the light button but nothing else works after this, all I see is the main watch time face
Hello,
My comment comes a bit late. Anyway, in case it could be helpful to someone:
My Fenix3 was not responding. After a loooong wake up and then analysis process, i found that the START/STOP switch was dead.
I ordered a mother board (+ i took the opportunity to change also the battery). It took almost 3 weeks to be delivered so I couldn't wait and i purchased a Fenix7X. But for 42US$, I could fix my Fenix3 that is now working as it used to work on its first day.
So, if you get your Fenix3 (or other model?) definitely stuck, don’t throw it away. Just change the motherboard and you’ll get a brand new healthy watch.
Hello Laurent, I want to know, where you get the motherboard?
Hai @laurent Bonet, can i know, where you get/buy the motherboard?
Hello, I am 63 and due to a heart surgery (aortic valve replacement), I have been spending quite some time at the hospital.
This is how I discovered that my Fenix 3 HR Sapphire (acquired in 2017) indicates an incorrect Heart Rate: sometimes it is lower (than what the medical equipment measures) or higher. And this difference can be as high as 20: for instance, once I was getting 103 on my Fenix while the medical device indicated 123 or 83.
This happened whether I was laying in my bed and the nurse was taking my blood pressure, or when I was biking on the static bike under medical supervision from medical stuff with computers (my body was connected to a more sophisticated medical device) that I was doing cardio training to retrain my heart.
Of course, I have switched off then off my Fenix multiple times but this has not corrected anything.
Apart from that, my Fenix 3 is working fine, no issue whatsoever (maybe the GPS has become a bit slower to catch my current position).
