CompTIA A+ Core 1 (220-1101) — Question 306

A printer is leaving vertical black lines on every print job. A technician runs a test job and sees the same patterned lines. Which of the following should the technician do first to resolve the issue?

Answer options

• A. Replace the toner.
• B. Contact the vendor.
• C. Clean the rollers.
• D. Replace the paper.

Correct answer: C

Explanation

Cleaning the rollers is the most effective first step because dirty rollers can cause smudges and lines on the prints. While replacing the toner might also help, it is less likely to be the root cause if the same lines appear in a test print. Contacting the vendor is unnecessary at this stage, and replacing the paper will not address the issue of vertical lines.