[CentOS] printers... (HP)

I can't remember if I asked here - I've got more than one printer, HP,
laser, builtin JetDirect. When I go there in a browser, I see the basic
thing, but I can't get to the networking page. It says that it wants a
password, no user name. It doesn't accept anything. Last week, a co-worker
reset one to factory defaults... and it comes up with the same thing.
Looking around on the Web, I don't see anything about a default password.

Clues for the poor?

        mark