I have a lexmark C912 that has been a pleasure to operate, until now...first there was a rattle/clicking noise. I noticed that magenta toner was spilling onto the documents. Looked inside and magenta toner was spilled inside the unit, on transfer belt, on the sides etc...changed toner cartridge and developer. Fixed the problem, but after about 300 prints, started again. What is causing this? any suggestions would be appreciated.
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