FreeBSD installation hanging

[Marc Freeman]

Hi freebsd-questions:-) i am trying to install freeBSD 4.6 for the first time. after completing the installation and rebooting the computer the following message appears and the computer hangs. F1    FreeBSD Default: F1 - hitting F1 or enter does not start the loading process. what could be the cause of the problem?   it is not a dualboot, but i have tried using both the boot mgr and standard MBR with the same effect. i have also tried installing the whole distribution and a minimal distribution also with no change. thanks in advance 4 the help  marc:-)