HP 8000 s manual Cartridge in attempts to extend the cartridge life

Problem	Cause and Solution
Horizontal lines or	A toner cartridge might be running out of toner. Check
streaks	the printer control panel display for a TONER LOW
	REPLACE <Color> or TONER OUT REPLACE <Color>
	message. Replace the toner cartridge indicated on the
	printer control panel display. Do not shake the toner
	cartridge in attempts to extend the cartridge life.
	For more information on replacing the toner cartridge,
	see the installation guide included with the toner
	cartridge.
	Dark or light lines or streaks appear in colors, except
	black. A toner cartridge might be defective. If the
	problem persists, contact a local authorized HP dealer
	or service representative for service.
	White lines or streaks only appear in the black areas of
	print, but not in color areas. Print the configuration page
	five times. The defect should clear with continued
	printing. Then reprint the print job. If the problem
	persists, replace the black toner cartridge. If the
	problem persists, contact a local authorized HP dealer
	or service representative for service.
	Dark or white lines or streaks in all colors, including
	black. Print the configuration page five times. The
	defect should clear with continued printing. If the defect
	does not clear, turn the printer off and on to reset the
	printer's density calibration. Make sure that the transfer
	belt is seated properly (rest the ends of the belt into the
	notches inside the printer). If the problem persists,
	replace the imaging drum. For more information on
	replacing the imaging drum, see the installation guide
	included with the drum kit.
	Light streaks in dark solid fill areas might indicate that
	the post charger on the transfer drum needs to be
	cleaned. Open and close the front door to complete a
	printer self-cleaning cycle. If the defect does not clear,
	clean the post charger. For information on cleaning the
	post charger, see “Cleaning the Post Charger” later in
	this chapter.

EN Print Quality Problems 189