Lexmark X746 - Streaked Vertical Lines Appear on Prints; Toner Fog or Background Shading Appears on the Page

Streaked vertical lines appear on prints
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Try one or more of the following:
SELECT ANOTHER TRAY OR FEEDER
• From the printer control panel Paper menu, select Default Source
• For Windows users, select the paper source from Print Properties.
• For Macintosh users, select the paper source from the Print dialog and pop‑up menus.
MAKE SURE THERE IS NO WORN, DEFECTIVE, OR EMPTY TONER CARTRIDGE
Replace the worn, defective, or empty toner cartridge.
CLEAR THE PAPER PATH AROUND THE TONER CARTRIDGE
Check the paper path around the toner cartridge.
CAUTION—HOT SURFACE: The inside of the printer might be hot. To reduce the risk of injury from a hot
component, allow the surface to cool before touching.
Clear any paper you see.
MAKE SURE THERE IS NO TONER IN THE PAPER PATH
Toner fog or background shading appears on the page
Try one or more of the following:
MAKE SURE THE TONER CARTRIDGE IS INSTALLED CORRECTLY OR IS NOT DEFECTIVE
Reinstall or replace the defective toner cartridge.
MAKE SURE THE TRANSFER MODULE IS NOT WORN OR DEFECTIVE
Replace the worn or defective transfer module.
MAKE SURE THE PHOTOCONDUCTOR UNIT IS NOT WORN OR DEFECTIVE
Replace the word or defective photoconductor unit.
Troubleshooting 318