I have been unable to cancel a Photoshop image print job which keeps printing page after page with only 1 to 4 rows of jibberish text. The computer job (Mac) has been canceled, the printer cable disconnected, but the machine keeps spitting out pages. Hold ReSET button for 5-10 seconds, no change. Hold GO and ReSET buttons for 5-10 seconds, no change. GO only, ditto. Have not been able to find a recommended procedure at either the HP site or in the newsgroups.
You have been most helpful once before, and I continue to be EXTReMELY impressed with your efforts to empower the community to fix their own hardware. The world needs more people like you!