Hello @diaverso, and welcome to the community.
Generally, a module that is still displayed in the device manager is not (flatly) defective.
The exclamation mark on the hardware symbol in the list can also be an indication of a driver problem.
I recommend that you download the driver package and transfer it to the S15447 via USB stick.
Unpack it from the stick and install the corresponding WLAN driver.
You can find the driver package here: https://www.medion.com/de/servicebackend/_lightbox/treiber_details.php?did=19992
This is not the latest one, but it is the one from MEDON with which the hardware was tested. So it could be a solution.
Of course, a defect cannot be completely ruled out. But before you open the device, I recommend using the driver from MEDION.
Best regards,
EastClintwood
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