DL380 G5 won't boot past Broadcom NetXtreme II Ethernet Boot Agent

I have an old DL380 G5 that I use for learning and testing purposes, but suddenly it won't boot past the Broadcom NetXtreme II Ethernet Boot Agent v2.8.5.
I then tried transfering CPU's and RAM to an identical server - same problem. 

I cannot access the RBSU even if I press F9, NIC's are integrated, so I don't really know what to do. 

Both CPU's show up fine, all 40 GB of RAM are registered fine, I have a dead disk, but logical drives have been set for this - basically, everything runs fine up until the Broadcom Boot Agent.

Any suggestions?