I put my MX892 print head and cartridges in another still working MX892 printer and it performed flawlessly. So...it wasn't the print head. It's the printer hardware. So irritating!
My Pixma MX892 is less than 2 years old and has officially shut down with this dreaded U052 error message. I took the print head out and put it in another working Pixma MX892 and the print head worked fine. It's not the print head no matter what Ca...