After recovery, Fedora doesn't boot (black screen, no error message)

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http://forums.fedoraforum.org – Hi, I had to replace a disk in my raid-1 and unfortunately, the rebuild didn't work. I have a backup of the system, so I set up a new raid. The system partition is an image (with partimage), I have a /home partition for the data, and a swap-partition. I used a Live-CD and created three partitions in (almost) the same size as the old ones. I restored the system partition from the image and used mkswap/mkfs for the other partitions. After reboot, the system froze directly after "trying to boot from cd...". So I tried to reinstall grub and made sure that the uuid's in fstab and (HowTos)