Current message on HP Officejet 6700 all-in-one: "There is a problem with the printer or ink system. Turn printer off then on. If problem persists, contact HP." I am off warranty, so cannot contact. I have turned off, then on, and checked connections. Have installed brand new hp black ink...other colors are also either new or still have ink---the 3 colors are not hp ink (comboink substitutions), however I have never before had any problem whatsoever.
What to do? I cannot print at all.