Lexmark MX721 - Vertical dark streaks on output when scanning from the ADF

Action Yes No
Step 1
a Open the scanner cover.
b Using a damp, soft, lint‑free cloth, wipe the ADF glass pad (A)
and ADF glass (B).
c Close the scanner cover.
Do vertical streaks appear on scanned documents?
Go to step 2. The problem is
solved.
Step 2
a Open the scanner cover.
b Using a damp, soft, lint‑free cloth, wipe the ADF glass (A) and
ADF glass pad (B) in door E.
c Close the scanner cover.
Do vertical streaks appear on scanned documents?
Contact
customer
support.
The problem is
solved.
Jagged image or text when scanning from the ADF
Troubleshooting 270