Online search method is to enter the grub command line, enter the kernel and initrd command, and then boot into the system, this can indeed successfully entered, but the next reboot or error.
After testing found that in the start screen press e, enter the command interface to start, found the first row of the start command for the root (hd1,0), and online tutorials are asked to enter the root (hd0,0), thought might be wrong here the reason, then modified to root (hd0,0), the successful launch press b.
While this launch was successful, but after the restart problem recurring, guess where the three lines of command is configured in grub.conf inside, so into the system, open the /boot/grub/grub.conf, modify the inside of the root (hd1, 0) to root (hd0,0), reboot reboot, smooth entry into the system is not being given.
References:
File not found Problem Solution: Error 15 Linux starts