Troubleshooting Laser Printer Blank Pages: Imaging Drum Failure
A technician is troubleshooting a laser printer that is printing blank pages. The toner cartridge is new and installed correctly. The printer performs its startup cycle normally. Which of the following components should the technician check NEXT?
⚠ Common exam trap
It's easy for candidates to assume a new toner cartridge guarantees toner delivery, overlooking the transfer roller's critical role in moving toner from the drum to the paper, or they incorrectly blame the fuser for blank pages when the fuser only affects toner adhesion, not initial transfer.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Transfer roller
The transfer roller applies a positive charge to the paper to attract the negatively charged toner from the imaging drum. If the transfer roller fails, toner is not transferred to the paper, resulting in blank pages even though the printer startup cycle completes normally and a new toner cartridge is installed correctly.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Fuser
Why it's wrong here
The fuser assembly uses heat and pressure to melt the toner particles into the paper fibers after the image has already been transferred. A faulty fuser—whether its heating element is dead, the thermistor has failed, or the pressure rollers are worn—will not cause blank pages; instead, the print will emerge with toner that easily smudges or wipes off, or it may show poor adhesion and flaking. Because the fuser only acts after transfer, its failure cannot prevent the image from being present on the paper.
When this WOULD be correct
A technician troubleshoots a laser printer printing pages with toner that easily smudges or rubs off. The correct answer would be the fuser, as it fails to properly melt and bond toner to the paper.
- ✓
Transfer roller
Why this is correct
The transfer roller applies a strong positive charge to the paper as it passes, pulling the negatively charged toner particles from the imaging drum's surface onto the paper. If the transfer roller is defective, has lost its electrical bias, or is not making proper contact, no toner is attracted away from the drum, so the paper leaves the printer completely blank even though the drum still holds a developed image. This is the most direct mechanical cause of blank pages when the toner cartridge is known to be full and the imaging drum is functioning.
- ✗
Pickup rollers
Why it's wrong here
Pickup rollers are mechanical rubber wheels that grip the paper from the input tray and feed it into the printer's paper path. If they are worn, dirty, or glazed, the likely symptoms are paper jams, multiple sheets feeding at once, or no paper being pulled into the printer at all—not blank pages. In cases where paper does successfully feed, the pickup rollers' job is done; they have no role in image formation, so a print will still appear correctly on any sheet that gets transported.
When this WOULD be correct
A technician is troubleshooting a laser printer that fails to pick up paper from the tray. The printer makes noise but no paper feeds. In this scenario, the pickup rollers would be the correct component to check next.
- ✗
Imaging drum
Why it's wrong here
The imaging drum is a photosensitive cylindrical component that carries the electrostatic latent image, attracts toner to that image via developer bias, and then transfers it to paper. A damaged or worn drum typically produces visible print defects such as faint areas, repetitive marks or spots at intervals matching the drum's circumference, or vertical streaks—not uniformly blank pages. Also, because the drum is often integrated into the toner cartridge in many laser printers, replacing the toner cartridge would have swapped in a new drum, making it an unlikely culprit for a sudden blank-page issue.
When this WOULD be correct
A technician is troubleshooting a laser printer that produces faint or ghosted images, and the toner cartridge is known to be good. In this case, the imaging drum should be checked next, as a worn or damaged drum fails to hold a proper charge, leading to faded prints.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 220-1101 exam frequently reuses these exact scenarios with slightly different constraints.
✓Transfer rollerCorrect answer▾
Why this is correct
The transfer roller applies a strong positive charge to the paper as it passes, pulling the negatively charged toner particles from the imaging drum's surface onto the paper. If the transfer roller is defective, has lost its electrical bias, or is not making proper contact, no toner is attracted away from the drum, so the paper leaves the printer completely blank even though the drum still holds a developed image. This is the most direct mechanical cause of blank pages when the toner cartridge is known to be full and the imaging drum is functioning.
✗FuserWrong answer — click to see why▾
Why this is wrong here
The fuser melts toner onto the paper; if it were faulty, you'd see smudging or toner not fused, not blank pages. Blank pages indicate toner is not being transferred to the paper, which occurs before the fuser stage.
★ When this WOULD be the correct answer
A technician troubleshoots a laser printer printing pages with toner that easily smudges or rubs off. The correct answer would be the fuser, as it fails to properly melt and bond toner to the paper.
Why candidates choose this
Candidates may confuse the fuser's role in finalizing the image with the transfer process, assuming a fuser issue could cause blank output, but blank pages point to a transfer or imaging problem.
✗Pickup rollersWrong answer — click to see why▾
Why this is wrong here
Pickup rollers are responsible for feeding paper from the tray into the printer. Since the printer prints blank pages (paper moves through but no image is transferred), the issue is with image transfer or fusing, not paper pickup.
★ When this WOULD be the correct answer
A technician is troubleshooting a laser printer that fails to pick up paper from the tray. The printer makes noise but no paper feeds. In this scenario, the pickup rollers would be the correct component to check next.
Why candidates choose this
Candidates may confuse paper feed issues with print quality issues, assuming that if nothing prints, the paper might not be feeding correctly, even though blank pages indicate successful paper movement.
✗Imaging drumWrong answer — click to see why▾
Why this is wrong here
The imaging drum transfers toner to the paper via electrostatic charge; if it were faulty, you'd typically see print quality issues like ghosting or streaks, not completely blank pages. Since the toner cartridge is new and the printer starts normally, the drum is unlikely the cause.
★ When this WOULD be the correct answer
A technician is troubleshooting a laser printer that produces faint or ghosted images, and the toner cartridge is known to be good. In this case, the imaging drum should be checked next, as a worn or damaged drum fails to hold a proper charge, leading to faded prints.
Why candidates choose this
Candidates may confuse the imaging drum with the toner cartridge or think it's responsible for initial image formation, but blank pages usually point to a transfer issue rather than a drum problem.
Analysis generated from the official 220-1101blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1101 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 220-1101 exam.