A7 WiFi module not working

I have a B&W A7 speaker with a non-working WiFi module. I am sure that it is the WiFi module, because I have a WiFi module of another A7. And I swapped it for testing. With the swapped WiFi module the A7 works perfect.

So I am looking for what could be wrong with the WiFi module (see picture below).

Does anyone have experience with repairing the B&W A7's WiFi module?

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