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)".

Tray 2 Error

No Waste Toner

Short Paper

No Belt Unit

Scan Unable xx

Size mismatch

Toner Low

Nothing shows up on the machine's display after installing additional memory.

Replace Drum

No Tray

Print Unable XX

Toner Error

Clear the message "Awaiting Redial"

Unusable Device

Drum Error (Drum!)

Small Paper

Why does the message "No Response/Busy" appear on my Transmission Verification Report?

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

Jam Duplex

No Paper

Replace Toner

I don't think I got the full yield from my high-yield toner cartridge, but the message "Toner Life End" or "Replace Toner" is displayed on the machine or the LED is on or flashing.

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

Size Error DX

Replace Belt

Jam Tray 1 / Jam Tray 2

Jam MP Tray

Jam Rear

Jam Inside

Replace Parts

Registration or Registration Failed.

Cartridge Error

Duplex Disabled

No Toner

Wrong Paper Size

Cover is Open

Document Jam

Out of Memory

Replace WT Box

No Drum Unit

Belt End Soon

WT Box End Soon

Drum Stop

What does "COMM.ERROR" on the LCD display mean?