@ALV_SUPECOLES This seems to be similar to this thread: https://forums.fogproject.org/topic/17759/ipxe-initialising-devices
In this case uefi firmware was updated then iPXE stops at initializing devices. If compiling and installing the latest version of iPXE doesn’t solve the problem then we will have to wait for either iPXE developers or Lenovo to fix the problem. https://forums.fogproject.org/topic/15826/updating-compiling-the-latest-version-of-ipxe