Sounds like a corrupt file system to me. It depends how much effort you want to make. You could open the box, connect the hard drive to a PC (perhaps using a USB to SATA adapter) and copy the program files off using a free piece of software called humaxrw; you would need to use recovery mode as the list of recorded programs has been lost. You could then play the .ts files on a PC. You might or might not be able to return them to the 9150 after you have formatted the drive; reports differ.Can't access recorded programmes anymore even though the hdd control is showing only 56%of hard disk free. Also if I press record button or plan a recording nothing happens. Can I fix this and find these programmes or should I just format hard disc?