Symptom:
(public)		 If you attempt to boot your Aventurin{e} 5.2 and just get a blinking cursor on the screen, then this means that the boot block needs to be rewritten.
Problem:
(public)		 This can happen for a number of odd reasons and should be fairly rare and by no means normal. However, this guide shows you how to recover from this situation - just in case.
Solution:
(public)

Boot off the Aventurin{e} 5.2 CD. At the boot prompt type "linux rescue" to boot in rescue mode without installing anything on the HDs.

Set your language and keyboard and choose not to configure the network.

Once you reach the command prompt, type "chroot /mnt/sysimage/" to chroot the filesystem on the HDs.

Now type the following two commands:

/sbin/new-kernel-pkg --mkinitrd --depmod --install 2.6.18-53.1.19.el5.028stab053.14ent

The command above goes into a single line! 

/etc/init.d/fix_grub stop

The first command makes the  2.6.18-53.1.19.el5.028stab053.14ent kernel the default boot kernel.

The second command makes sure that the bootblock is written back to the HDs. This second command may take several moments to complete.

If it all completes without errors, then press CTRL + ALT + DEL to reboot and eject the CD from the drive. 

Your Aventurin{e} should now boot just fine.