Hi and welcome to the forum.
You don’t say what is wrong with the module and maybe you could repair it personally or via a shop. The common issue are a failed USB port or the microphone each of which is addressed in some detail in the following posts.
@JohnHughes (thanks again) send me two broken bottom Modules some days ago. This one has a defekt µUSB port.
After disassembling I took a picture with a microscope camera and found some solder cracks. Barely to see without magnification. Two cracks at the shield contacts that I am not too worry about, but also one at contact 5. I am sure that was a slack joint. Some serious force must be acted to the Port.
I will try to resolder the joints and hope the bottom module will be able to do its work…
As fairphone angel (in Berlin) I have a lot of support cases with nonfunctional microphones in the bottom modul. A lot of users have minimum the 2nd, often the 3rd bottom module. Mostly easily changed by Fairphone support in warranty.
But there is a lot of waste (I collect old faulty modules and send them back for recycling).
So my questions:
Did anyone successfully repaired the microphone inside the bottom module by soldering a new smd microphone?
What’s the reason for the highly rate of f…
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