



I still receive the error message "Replace DrumX" or "Drum End SoonX" after I replace the drum unit with a newone.I keep getting the error message "Authenticate Err (Authentication error)".I just replaced the toner cartridge and the LCD continues to display the message "Toner Life End" or "ReplaceToner".I cannot scan via network getting the error "CC031" or "MTW012".I cannot repair the wired or wireless connection using the Network Connection Repair Tool (Windows).I cannot attach scanned data to my email application, or the default email application is not set (CC4-121).Calibrate or Calibration Failed or Calibration."Offline" appears on the Status Monitor.
