network conneciton not found on Raspberry Pi 3B (Revision a02082)

Hi all,

I need to make changes to an IoT-project that I had last updated in late 2020. Now when I started the Raspberry I used for developing, it could not find any network (WLAN, Ethernet), which it did of course back then. I re-installed IoT dashboard and downloaded the OS to a new SD-Card (Sandisk ultra 16 GB), tried different routers and ethernet cables, but still no connection.

When running on Raspbian, all networks are found. So it is not a hardware issue.

Does anybody have a clue? It would be a great relief - I have been searching for hours!

Thanks!