Hello: I inherited a Macpro2,1 without a hard drive. I installed one hard drive but I'm not able to boot from a bootable mac OS 10.7 DVD. This is what I see while the DVD is loading, a stripped background behind the Apple logo: After a while the Macpro gets stuck in this screen: If I boot the mac without a DVD, a file symbol with a question mark appears, pretty much what I'd expect considering the fact that the hard drive is empty but the stripes in the background are weird. For the record: I'm hable to hear the start up chime. Any help on what can be failing? I've tried to run Apple Hardware Test but I can't get it to run.