Grub Crash

[KIMARIO FAWKES]

I recently updated my system with yum install, and since the update Grub 
does not load.
I turn on my computer and a blank screen appears at the top to the screen it 
says Grub _ .The problem is nothing happens.

What I have done to fix the problem:
I booted from my installation dics to see if i could mnt linux via restore 
F5, I manage to get into system remove the yum kernel install, and I even 
check the grub config file  with vim but every thing seem to be fine. This 
is the first major problem I have had with FC3. What can I do without lose'n 
my system to a fresh install