Sigh. Mac Pro won't boot.

[anonymouse1]

1. Does Mavs run on different disks?

2. is the problem with a specific hard drive bay? Have you tried just having the one HD in when you boot, no external?

3. Just for grins, have you tried it without the KVM?

4. AHT doesn't thoroughly test RAM. Again, for grins, I'd try one RAM stick at a time.

No promises for any of these; I'd just try them before buying a new machine...