Chances are the file system from the television has overarched the native NTFS that runs Windows. If the suggestion above about using a Linux live-CD to mount the drive fails, take the disk outof the computer, buy a converter to enable it to be connected to anoher machine by USB then run Windows xcheckdisk. That may be able to recover the file system and make the disk operable again. The syntax in the Command Line of the other machine is
chkdsk x: /r
where x is the drive letter assigned by the system and the /r switch is to find and fix any errors.