carriage

My iP7250 no longer prints. When I try to print, I get two pairs of orange and white flashes, which apparently means that there is either a paper jam or the carriage is obstructed. There is no paper jam, but I have noticed that when I look at the carriage after the error code is displayed, it is...

I had a fuzzy horizontal line during print-head alignment value print out. I removed right side cover of to get to the timing strip and was able to clean it. Being curious I turned the exposed gears with my fingers to see the operation of the mechanism. Now it won't initialize properly and I...