I have a Toshiba RD-XV47 HDD/DVD/VCR just out of warranty! When switched on the unit comes up with HDD Error and switches itself off. Great. Can't even use the VCR or the DVD. I fitted another HDD I had kicking around with the intention of formatting it from the menu but got the same message. Is it possible that the HDD is not just for storage but contains some operating system? What file system is used on the disc?