So my old dvd drive stopped working, was giving that horrific grinding sound when trying to load discs. I bought the same model dvd drive (Lite-On) and just swapped the hardware from the new drive to the broken one to use the same motherboard. If I put in a game disc, the menu screen for the game loads without issue. But upon trying to start a game, the system freezes. (ie you hit start game/new game, it leaves menu screen to a black screen and freezes before the game starts). I've tested with Halo 3, which when you go to start new campaign it gives you the halo loading screen deal, and after its done loading it freezes. And I've tested GTA IV which freezes right off the bat since GTA goes straight into the game. Haven't been able to test any other games as I lost all of them in a recent move, but I don't think that matters. Any ideas?