My Canon Pixma MG6320 has been doing the same thing for the past 4-5 months, essentially rendering it a giant paperweight. I guess printers only last <2 years nowadays. I have cleaned the encoder strip multiple times and I have cleaned the print cartridge and still nothing. I have also replaced the ink twice and done all the calibrations that are available throught the printer's menu and I still get the same result.
I am both glad and saddened to see that I am not the only person experiencing these problems. What is the problem, and what is the fix?! This can't be an isolated problem.