Power button light and Resume button light both flash continually; upon pressing the Resume button, the printer power shuts off (at no time does the Print Cartridge Light go on). When I go to the Toolbox software to test the communication, "two way communication is established" is the result I get, but when I then proceed to do a "Print Test Page" test, I get a message like "communication error".
When I open the top door then turn the printer power button On, what happens is the following: paper is fed, the print cartridge cradle moves back and forth then settles on the LEFT side of the printer, not the CENTER as it is supposed to, and both the green and amber lights begin flashing; when I press the amber light button, the power goes off.
The HP Owners' Guide doesn't address any of this.
How do I get my printer to work again?
P.S. This problem happened suddenly without any warning (except that the paper feeding mechanism has been goofing up lately; sometimes I have to manually push the top sheet of paper in to get it to feed properly)
P.P.S. I have already tried uninstalling the driver and associated software and re-installing it and the results are no different than the above mentioned description.