I'll start by saing that I have access to multiple XBOX 360's so I can do testing between them
On one of my original XBOX 360 units (not elite or slim), I can't play some games. When I put the disk in, the XBOX indicates 'reading' but then returns to a state where my only option is to open the door - as if no disk was in the drive at all. What makes things weirder is that it only does this with some disks. They all seem to be early release games like: Oblivion, Kameo, Dead Rising, Lost Planet. All late release games and new games work. These games work in 2 other XBOXes that I've got.
Anyone ever hit anything like this?