Ok, so I've come up with a plausible explanation for my TK50 problem. Apparently the drive thinks there is a tape cartridge in it, even though there isn't one. It runs the classic "loading sequence" (slow uptake then fast uptake) even though there isn't a cartridge present. That suggests that it is mistaken about the presence of a tape. So, does anyone know what all of the methods are the TK50 uses to sense the presence of a tape? I'd like to get this one fixed as it is an E4 (I've got two B2's, one E3, and working E4 and one dead E4) --Chuck