Hello,
After spending days trying to get my C240 M4 to upgrade to the latest BIOS from 4.0.2d, was able to get the Host Utility Upgrade to boot using UCS-C240-m4-huu.4.0.2r.iso. It seems to have updated the CIMC with no issue, but after attempting the BIOS, it has been stuck on the bootloader screen.
I have tried shifting the CMOS jumpers with no success. Any support would be appreciated. These machines are a nightmare to work with.