Pressing F1 when seeing the blue IBM logo on the black screen should get you into the main BIOS ("Setup") on your x345 server. Reboot or power-cycle the server to get to that screen...
Are you locked out via an administrator password? If so, that's probably going to require a system board replacement (or at least a service call from IBM). Those are burned into an EEPROM on the board, and can't be reset like a CMOS-level password.
Last edited by strick1226; 01-12-2010 at 10:16 AM.
Reason: spelling, lol