I tried like 4 PSU’s. No difference at all. My current PI 3B is working fine with the SD Card and PSU’s. So I think there is a compability issue with it at the moment. Let’s just wait for a update. Gives me at the same time a chance to reinstall the thing freshly. Can anybody point out how to make a backup and hassle free restore it on a freshly installed system?
EDIT:
Check these URL’s