Match the symptom, then work through the safe checks.
1. What best matches what you observe?
2. Complete only the checks that are safe for you.
Show stop conditions
- Toner spills or internal parts are hot
- A drum, transfer belt, or printhead surface is visibly damaged
Likely causes
- Inkjet nozzles are blocked or misaligned
- Toner, drum, transfer, or fuser components are worn or dirty
- Paper is damp, coated incorrectly, or set to the wrong media type
- Debris or ink is marking the paper path
Quick checks, in order
Print an internal quality test
The pattern direction and color help identify the subsystem.
Check supply level and media setting
Use dry supported paper and the matching media type.
Run one cleaning or calibration procedure
Follow the model menu and allow completion.
Do not touch drums, belts, or printhead surfaces
Fingerprints and scratches can permanently damage imaging parts.
What pattern do the lines follow?
A roller, drum, belt, or fixed nozzle area is likely.
Focus on that cartridge, channel, or printhead color.
Check scaling, driver, and the source document.
Stop and get qualified help when
- Toner spills or internal parts are hot
- A drum, transfer belt, or printhead surface is visibly damaged
Official support and model manuals
Use the full model number from the rating label. The manufacturer manual is the deciding reference when codes differ by region or product family.
Frequently asked questions
Will alignment fix missing lines?
Alignment corrects placement; it does not usually restore blocked nozzles or damaged imaging parts.
Why do marks repeat at equal distances?
A rotating roller or drum defect often repeats once per circumference.