The thing isn't powering up long enough to start checking drives etc. Even if the drives were wrongly configured, I should still get as far as the BIOS boot-up screen. The time from power-up to power-down is no more than 10 secs!
I also suspected that the removal of the CD may have been related, but, even with all drives disconnected there's no change. I'm beginning to think that there's a mobo or CPU problem, but I can't see why!
Scroggs