Just a thought....is the ROM of the A590 recent enough to even allow removable media drives to be hooked up to it? It's got the same ROM as an A2091, as I recall, and that had problems with CD-ROM drives, etc. unless you upgraded the ROM to version 7.0 or something.
Another thing....is there a CD in the drive when you turn on the computer? It could be as simple a problem as the Amiga looking for a boot-block on the disc in the CD drive (because it thinks it is a hard-drive) and not finding one, and so it waits forever.
