Linux Startup problems?

Linux Startup problems? -- Linux general technology-Linux technology and application information. For details, refer to the following section. Today I encountered a strange problem! Not done yet! Hope you can help me!
My system is FC7. It was running normally, but I don't know why it was shut down!
Then I restarted and the result couldn't be started. After the organizer passed the detection, I stopped at GRUB and the cursor was flashing, but I couldn't enter anything!
Then I found a lot of information and tried to fix GRUB!
Almost all methods on the Internet have been tried!
(The method I used is as follows:
1. Use the CD to enter the rescue mode. Enter GRUB-> root (hd0, 0) * (This step is normal)--> Setup (hd0) * Never let me live or liveThe error message "error 2" is missing! Give up here.
2. After the same mode as above, chroot/mnt/sysimage --> grub-install hd0 * An error is reported here (as if it was a BIOS error), SO (grub-install -- recheck hd0) the error is reported again (the error is also forgotten, only remember what the. map File is faulty)Give up again!
3. The system cannot be used to create a USB boot disk! (It's almost the same as above)
4. The best method is to reinstall the system. I changed FC8 and the installation process was smooth. Everything is OK!
Boot, exactly the same as above! Disappointed ..
(Only one system is installed on my computer, and there is no windows)
)
Now I can only suspect that the boot zone or hard disk is faulty!
I don't know you have the above tips. Please give me some advice!