Hi Simon,
Thanks for the help.
Your suggestion caused me to wonder what a print roller is, so I took a flashlight and started looking. I found a small dot of something on a thin plastic film ribbon that runs horizontally and touches the print head (guides it?). Anyway, I removed it and all is...
My Photosmart printer has started printing one smeared column near, but not on, the left edge of each page. In other words, if a printed line consists of "123456789" with a 1" left margin, the "2" is blurred horizontally, and the "1" and all other numbers are OK. If I move the left margin -.2"...