Understanding the printer control panel light sequences

The printer control panel lights can mean different things, depending on the light sequence. The lights can be on, off, blinking, or blinking slowly, indicating a printer status, a warning, or an error. Some errors have the same light sequence. The following table shows the appearances of the lights.

On	Blinking	Blinking slowly

If the printer control panel light sequence matches a light sequence in the following table, then see the message in the same row.

Light sequence						Message
						Close front door
						Replace imaging unit
						Replace unsupported toner cartridge
						Replace unsupported imaging unit
						Toner cartridge, imaging unit mismatch
						Canceling print job
						Flushing buffer
						Resolution reduced
The printer control panel lights blink one at a time from left to right repeatedly.						Non-Lexmark toner cartridge
						Non-Lexmark imaging unit
						Printer had to restart
						Toner cartridge very low
						Imaging unit very low
						Toner cartridge nearly low
						Imaging unit nearly low
						Service error
						Load paper
						Remove paper from standard bin
						Toner cartridge low
						Imaging unit low
						Ready
						Waiting
						Busy
						Not ready

If the printer control panel light sequence matches a light sequence in the “Primary light sequence” column of the following table, then press twice quickly on the printer control panel. Search for a matching light sequence in the “Supplemental light sequence” column, and then see the message in the same row.

Primary light sequence						Supplemental light sequence						Message
												Missing or unresponsive toner cartridge
												Replace toner cartridge
												Toner cartridge, printer region mismatch
												Missing or unresponsive imaging unit
												Standard network software error
												Network [x] software error
												Insufficient memory to collate job
												PPDS font error
												Complex page
												Insufficient memory to support Resource Save feature
												Standard parallel port disabled
												Rear USB port disabled
												Too many trays attached
												Incorrect paper size
												Memory full
												Paper jam, clear standard bin
												Paper jam, remove standard tray to clear duplex
												Paper jam, open rear door
												Paper jam, remove standard tray to clear duplex
												Paper jam, open front door
												Paper jam, remove standard tray
												Paper jam, remove optional tray
												Paper jam, manual feeder