Hp dc7100 installs 5.4-rc1 from CD but won't boot from HD

[John Hawkes-Reed]

(Which I think covers the problem)

Boots from CD ok, USB keyboard seems less than reliable, so I'm using a PS2 
item. Running through 'standard' install appears to write data to the (SATA 
ICH6 controller) disk, but on reboot it sits at the F1: FreeBSD prompt 
beeping every ten seconds.

Is there likely to be anything obvious I've missed? (Or indeed more useful 
data I can provide.)

As a test, I installed a Debian Sarge CD. That works.

-- 
JH-R