Fix Grub in Fedora

Reinstalling grub
STEP 1:
->Boot using installation disc
->choose rescue mode
->The system existing will be mounted on /mnt/sysimage
STEP 2:
Now execute the following commands
#chroot /mnt/sysimage
#grub-install /dev/sda //Assuming fedora is installed in /dev/sda

Enjoy!!!!