CompTIA A+ Core 1 (220-1101) — Question 416

When a user tries to print a document on a laser printer, vertical lines appear on the printout. Which of the following should the technician replace?

Answer options

• A. Mirror
• B. Fuser
• C. Drum
• D. Toner

Correct answer: C

Explanation

The drum is responsible for transferring the toner onto the paper, and if it is damaged or worn, it can cause vertical lines in the printout. The mirror, fuser, and toner do not typically cause this specific issue; therefore, replacing the drum is the appropriate solution.