Heads have been cleaned & nozzles checked.
Whatever is printed it always prints as well pink/red horizontal lines .1 inch between the lines for the whole of the A4 page in portrait. When printing in panoramic the lines are vertical on the page. The same using XP and Windows 7
Clogged print head jets. You may have to run the cleaning process in the printer menu several more times. Failing that there are some head cleaning kits available on the market that use a syringe and cleaning fluid to clean stubborn blocked jets. If I remember correctly the kit I obtained around 3 years ago was about £15 and worked well.
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