Hi. I have a 2007 H15 DVR. The hard drive seemed to be failing, so I decided to replace it. I Googled the procedure and found holding down the rec and down arrow while booting would format the hard drive. I purchased an exact same size 160gb drive. The original was Seagate, I bought a Western Digital, brand new. Jumpers were set correctly, nothing. I get the welcome screen, almost there, and the diagnostics screen. Then it goes grey, nothing further happens. Funny thing is, I tried an old 40gb drive I had lying around, and it starts formatting every time! WTF? So I figure I`d clone the Seagate drive to the WD on my computer, sector by sector. It was successful. Installed it again, still nothing. I then put back the original, and it started formatting without any button holding. What gives? Why will any other hard drive work except the WD I just bought??? It tested good, and will work fine on any computer?