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I have an HP Color LaserJet CP3505n That prints a blue Cyan background

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My HP printer has been printing with a Cyan background. I cleaned out the entire inside, changed out the cartridges and cleaned the Transfer belt, which had vertical streaks on it and Cyan coloring all over multiple parts of it. After cleaning the machine I ran a test print and the cyan background was printed again. I checked the transfer belt and it too had more cyan residue on it. I use HP cartridges and have changed them out in hopes that there was a leak causing the cyan to be everywhere but nothing I have tried is changing the outcome. I need help. Also when I print in black and white there is not residue found. Blue background on Left, Black and white on right.Blue background on Left, Black and white on right.

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Message 2 of 2
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2 bad cartridges is always a possibility,  although remote.

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