Installed GRUB in MBR but no boot

[Gerry Reno]

I have an old machine with a copy of FC6 on it.  The boot drive died so 
I had to replace it.  It was part of a md raid-1 array so I put the 
partition table back on it and then added it back to the array which 
then synced it.  I reinstalled the original MBR onto the new drive and 
then rebooted expecting the machine to boot.  But I got the GRUB prompt 
instead.  So I get out my GRUB boot disk and boot the machine.  Then I 
run grub:
# cat /boot/grub/device.map
(hd0) /dev/hde
(hd1) /dev/hdg

# grub
grub> root (hd0,0)
grub> find /grub/menu.lst  (finds it)
grub> setup (hd0)          (normal output)
grub> setup (hd1)          (normal output)
grub> quit

So now reboot again and this time the machine starts booting and then 
quickly flashes something about stage 1.5 and then I hear the boot drive 
click and then the machine reboots.  So now we're stuck in a loop.

Can someone show me what might be wrong here?

Regards,
Gerry