Printer Repair Questions? Ask IT Technicians for Answers ASAP
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The software detection can not be relied on that is why drums print a line in the same spot every time to note they need to be replaced.
Otherwise people would constantly try to reset the counter even though it can damage the machine. From everything you have told me the drum needs to be replaced.
It can cause everything you are describing and the only other part that could cause the light prints would be the fuser if it was not heating properly.
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