Lexmark MX931
The printed or copied images show dark streaks following the paper feeding direction.
Replace the imaging unit.
To order the imaging unit, follow these steps:
Go to lexmark.com.
Click Supplies & Accessories. In the dropdown menu, click Find Supplies.
In the search bar, type the printer model or supplies part number. Click Find my supplies.
In the product page, scroll down and look for the Supplies tab.
Choose the product to order and Add to Cart.