Shaky vertical lines
behind the cartridge carrier, there is a film filled with vertical lines from left to right.. get a flash light, move the head carrier and check the film for any dirt or splash of ink.. with dirt, you can use tissue or table napkin to clean it. same with ink. be careful not to press too hard. clip the film in between the tissue paper and move it from left to right.. be careful not to clip it too hard it might pop out of its holder. hope to be of help.
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