I ran chkdsk on my Toshiba laptop and it seemed to have been stuck trying to repair the same file for about 10 hours. I at the time being unaware of the dangers of stopping chkdsk, stopped it. When I try to boot up the computer, I just get the toshiba splash screen and it is unrespnsive to any attempt to use keycodes to access the BIOS , safe mode, etc. Is my HDD totally fried?