The NAS is still down

I got my Western Digital green 1TB drives the other day. That didn’t work. I got a new power supply, thinking that the new drives just took more power than the old clunker could muster. No luck. Still dead. Not sure what the issue is at the moment. I need more time to troubleshoot. The system takes forever to boot, whether it is the existing system disk, or a CD of Ubuntu. It sits there just after a boot logo for a long time. With the drives in, it never gets further. Without them, it eventually continues. I can’t figure out where it gets stalled. What could be causing this?