No Belt Unit

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

Jam Inside

Out of Memory

Drums End Soon/ Drum End Soon(X)

Drum Error (Drum!)

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

No Paper

Jam Rear

Jam Tray 1

Belt End Soon

WT Box End Soon