I have had this problem for months... The compatible cartridge didn't last very long so I decided not to buy them again and get originals in future. Everytime I change the black toner, from a compatible cartridge to an original, I get nothing printing except black pages. These are usually solid black without any text. I have sent numerous cartridges back and re-ordered just incase the cartridges were faulty (3 times now). What I can't understand is why, when I reinstall the old (nearly used) compatible cartridge, it immediately works perfectly again. Please help - this is driving me mad and I am really close the having to buy a new machine.
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