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

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

(Video) Replace the Toner Cartridge

Drum !

Size Mismatch

Paper is Jammed in the Manual Feed Slot

Replace the Belt Unit

Replace the Waste Toner Box

Paper is Jammed underneath the Paper Tray

Paper is Jammed in the Back of the Machine

Paper is Jammed Inside the Machine

Paper is Jammed in the Paper Tray

Replace the Drum Unit

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Drum End Soon

Cover is Open

No Waste Toner

Short Paper

Registration or Registration failed.

No Belt Unit

Manual Feed

No Drum Unit

Log Access Error

Small Paper

Toner Error

Cartridge Error

No Toner

Size Error DX or Size Error 2-sided

Out of Memory/Print Data Full

No Paper / No Paper T1

No Tray / No Tray T1 / No Tray1

Scan Unable ##

Print Unable ##

Calibrate or Calibration Failed or Calibration.

2-sided Disabled

Document Jam

Replace Fuser

Replace PF Kit xx

Belt End Soon

WT Box End Soon

Drum Stop