I had the same thing with a C454e. Your post almost sounds identical to mine! Customer also using OEM toner. Hard chunk of toner around 1/2" in size...
Keep in mind K/M copiers are marketed as "business" color. Agree the print quality has gone down with every model since the CF3102 which produced one...
I would try to flash firmware first. Second thing would be to disconnect the HDD and see if it starts. Can also try to do a trouble reset by holding...
I needed a finisher to swap out for a customers and the only one I have was flashed by mistake with FS536 firmware about a year ago. It has a note on...
I know the OEM's keep lowering the fuser temp & melting point of toner to save energy but I hope these big chunks of toner isn't happening because of...
What is the drum life? Usually when machine throws the C255x codes it's because an overlife drum caused the developer to dump. So when this happens I...
I just updated F/W on this off lease machine today (see before & after attached pics). This is 10th off lease "8" series that I've update this month...
Also something else came to mind, since you have 3 machines doing same thing if not the driver I would check and make sure sleep mode is off. I know...
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