Sorry to mess you about folks, but I've had this POS on the bench now for a few days and it's got a mind of it's own. I checked the cables (thanks popatim) but it doesn't always pick up both DVDRWs, sometimes none at all. BIOS picks them up prior to W7 "not seeing" them??? When it DOES see both drives, I can force it to "lose" one by opening a prog the client installed called BurnAware. I Googled it with the prob but no reported glitches from anyone else. Cannot burn using BurnAware but is perfectly OK woth CDburnerXP.
Do I guess BurnAware has altered a DLL and it's now corrupt? Weird!