No I haven't found a kill button on it yet. It's an old Deskjet 690c, with a on/off and a paper/error button and not much more. I cut the power from the printer to see if I could erase the memory, but it started up again when I plugged it back in. So I just don't know how to make it stop.
Another related question: I'm thinking of buying a new printer and I was wondering if the HP aserjets are good with Linux on an old computer? I have two usb 1.1 and parallel, can I use any new laserprinter? I have a p111 700mhz. Does anyone have any tips for buying a laserprinter I can use with Linux?