Got the console cable all connected up and got tot he ok prompt.
Typed in boot cdrom and got the following:
ok boot cdrom
Boot device: /pci@8,700000/scsi@6/disk@6,0:f File and args:
ERROR: /packages/deblocker: Last Trap: Corrected ECC Error
Can't read disk label.
Can't open disk label package
Can't open boot device
ok
You are probably right that it is a bad dvd drive. However, check to make sure that alias is pointing to the dvd correctly in case that is the problem. Try "probe-scsi-all" at the OK prompt.