After installing a replacement CIS system, an external waste tank, getting a couple of piezography profiles done by Inkjet Mall and a few other improvements, I've been able to print a few beautifully toned images.
Then suddenly, I got flashing lights, alternating between the paper-advance button and the ink-drop button. The printer is frozen in place. I tried several tricks involving powering down and restarting holding down various button combos, disconnecting by removing the power at the outlet, etc., all to no avail.
I can't find any explanation for this symptom anywhere, but I wonder if it's the waste pad reset problem. With that thought, I searched high and low for the trick to reset the printer. It seems that reset software exists for a Windows-based system but not for a Mac.
Any thoughts, suggestions will be most welcome.