I have an HP c4280 Printer all-in one Photosmart. Lately, every time I try to scan or make copies with my printer it always scan or print a vertical black line bar in the middle of the paper. I called the HP tech support three time, but they were not a big help. Also, I checked this link http://h10025.www1.hp.com/ewfrf/wc/docum…
The screen is not broken, and before I didn’t have this issues. Does anyone know a trick, or how to solve this issues beside buying a new one?

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