I have a ES 3040c that is giving me this message, started with BK now the Mangenta is showing up same message, I have done the same thing I did for the 455 with the same message, clean that little PWB at the rear of the mach, where the toner cart mates up to it, its the part with the 5 little springs on it, there is a identical PWB on the toner cart's, clean the PWB's little gold squares to clean off any oxidation that may be there, went away for a while, but came back, new toner cart did not help any, got some fo the PWB's on order for the toner units, firmware I belive is current, and meter count on it is low, less than 30K or so on BK...any ideas???????
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