Same here. Hard to notice any unusual background on those. Considering the total counter and the rest i noticed following: You don't need to clean the laser unit, the grayscale is bad and only replacement of the K drum unit will fix it (trust me I've been there), yellow fill is weak (color calibration, U412, U410 might help a bit, but new developer unit Y will fix it). The rest looks ok from my point of view.
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