WTF?

   I've run into something I suspect is from my own stupidity. A working box fails to show an installed CDROM. I poked at it in Device Manager with no luck.
   Nexted I checked it's jumpers and tried changing them...nada. Convinced it was the cable I swapped it with a working HDD in the 2nd position, again...nothing.
    Next I pulled a drive from an old box and installed it but again no CDROM showed up. Both CD's *might* be dead but I kinda doubt that.
   Is there a BIOS setting or something just plain dumb on my part I'm forgetting?

" did you try switching from the primary to the secondary controller (or vice-versa)?"

If that means switching it to both connections of the data cable and resetting for slave and Master I did.