Having watched the video I'm not sure that the problem is in the print heads. Because the machine printed a photo on the wrong side of the paper there was a lot of wet ink. I think some of this has transferred to one of the rollers (are there rollers?) but only in one area. Initially subsequent prints - about 3 - had 2 almost continuous thin black lines, about 1" apart, running lengthwise on one side. After a couple more prints these have almost disappeared but there is some 'ghosting' still on prints with a light background. Is this a print head issue or something different?
The problem happened yesterday so it has had plenty of time to dry out. Will now try the head cleaning and let you know how I get on.
Falling at the first hurdle! I am using a Mac. To print I go to File and click on print. The name of my printer shows at the top but there is no 'Options' to click on next so therefore I cannot find 'Printer Properties' How do I access this first step to follow the instructions please.
Have found the Wrench and Screwdriver icon on the display panel of the printer, from there found 'Cleaning the printhead' and the machine is now going through the process. Cannot find anything similar in the print or Page Setup dialog box on my computer though. Ok, have completed the cleaning and taken a print which looks fine as there are no missing dots. However, there is a very small black dot in the centre lower quarter of the Yellow panel. Is this significant?