HECK THE PAPER TYPE SETTING
Make sure the paper type setting matches the paper loaded in the tray:
From the printer control panel, check the Paper Type setting from the Paper menu.
Before sending the job to print, specify the correct type setting:
For Windows users, specify the type from Print Properties.
For Macintosh users, specify the type from the Print dialog.
HE TONER IS LOW
When 88 Cartridge Low appears, order a new print cartridge.
HE PRINT CARTRIDGE MAY BE DEFECTIVE
Replace the print cartridge.
EPEATING MARKS OCCUR EVENLY DOWN THE PAGE
Replace the charge rolls if the defects occur every 28.3 mm (1.11 in.).
Replace the transfer roller if the defects occur every 51.7 mm (2.04 in.).
Replace the print cartridge if the defects occur every:
47.8 mm (1.88 in.)
96.8 mm (3.81 in.)
Replace the fuser if the defects occur every:
88.0 mm (3.46 in.)
95.2 mm (3.75 in.)
These are possible solutions. Try one or more of the following:
HECK THE PAPER GUIDES
Move the guides in the tray to the correct positions for the paper size loaded.