I have a ThinkPad T490s here which has to be set up via the SCCM. With the normal T490 everything works but here the screen "OS successfully installed" or something similar is displayed for only 1 ms and then jumps to the IPv6. I tried the Secure Boot on and off but got no further. I also used different adapters. Once it happened by chance but I can't get it back
With newer Lenovos I know the problem that the network adapter can't be loaded because the drivers are missing. I always used a USB to Ethernet adapter.
In which mode does it start? UEFI or Legacy
UEFI whatever works. I think it is somehow due to the adapters.