![]() ![]() Do not use air spray, it could make the situation worse. Generally the contacts are metal parts near the spots where the cartridge sits inside the printer, you clean them with cotton swab, and some isopropyl alcohol will be helpful. If the printer has separated drum unit, its failure could be the cause too, then it might need to be replaced. ![]() If the drum life is ended, it needs to be replaced. Some printer has separated drum unit, it needs to be checked as well.
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