Can't boot after reinstallation

When I start my computer I don't get the GRUB Bootloader screen where I can chose which OS to boot. All I get is "GRUB _" in the upper left corner with a black background.

This happened after I reinstalled Fedora Core 5. I tried reinstalling it again writing GRUB to both the MBR and first sector with the same result.

I've searched the forum but haven't found anything. Help would be very appreciated.

EDIT: Looks like I were a little too fast to ask for help. I found a great thread covering my problem.
Solution: Remove the other harddrive, reinstall FC5, put the other harddrive back.