I just replaced the toner cartridge and the LCD continues to display the message "Toner Life End" or "Replace Toner".

I keep getting the error message "Authenticate Err (Authentication error)".

I still receive the error message "Replace DrumX" or "Drum End SoonX" after I replace the drum unit with a new one.

Replace Drum

Cover is Open

Short Paper

No Belt Unit

No Waste Toner

Calibrate or Calibration Failed or Calibration.

Scan Unable xx

Cartridge Error

No Tray

Print Unable XX

Replace Fuser

Registration or Registration failed.

Replace PF Kit xx

Toner Error

Fuser Error or Self-Diagnostic

When I send a fax from the machine, an error "not register." or "not registered." is displayed.

Manual Feed

Size mismatch

Jam Manual Feed

2-sided Disabled

No Toner

No Paper

Unusable Device

Document Jam

Out of Memory

Replace Belt

Size Error DX or Size Error 2-sided

Replace WT (waste toner) Box

Jam 2-sided

Jam Rear

Jam Inside

Jam Tray 1 or Jam Tray

Replace Toner

Log Access Error

Drums End Soon/ Drum End Soon(X)

Drum Error (Drum!)

Small Paper

Belt End Soon

WT Box End Soon

Drum Stop