Printer Printing Lines
Are lines, streaks, or bands appearing on your prints? Identify the pattern and find the right printer test.
Step 1
What do the lines look like?
Select every pattern that matches what you see. Each choice explains the pattern and points to the right test.
Run the right test
Pale gaps where ink should be.
Check dark bands, streaks, repeated marks, and overall print consistency.
Laser printer owners should also check the manufacturer's model-specific maintenance guidance.
Bands running across the print direction.
Streaks running with the feed direction.
CMYK Printer TestColor Printer Test
Lines in one color, or colors behaving differently.
Lines with missing sections.
Marks repeating with even spacing.
Repeated spacing can point to a printer-path or imaging issue, especially on laser printers, but a browser test cannot identify the failed component.
Print Quality TestGrayscale Printer TestPhoto Test
Banding visible mainly in smooth tones.
Prints are clean, copies are not.
The issue may be in the scanner glass or document feeder rather than the printer. Print a standalone browser test to separate printing from copying/scanning.
Step 2
Inkjet vs Laser
Inkjet
Possible visible causes can include:
- nozzle gaps
- uneven ink output
- print alignment or registration
- print settings
- paper/media issues
Laser
Possible visible causes can include:
- toner density problems
- paper-path contamination
- imaging/drum-related defects
- fuser or other model-specific issues
- print settings/media
Step 3
Run the right test
Printer Nozzle Test
Find missing lines and uneven outputPrinter Alignment Test
Check positioning, skew and print alignmentPrint Quality Test
Check text, lines, gradients and detailCMYK Printer Test
Check cyan, magenta, yellow and blackGrayscale Printer Test
Check gray tones and black outputPhoto Printer Test
Check banding in photos, gradients and fine detailStep 4
What the test result means
Test looks normal
Check printer settings, paper/media, and the original document. If the problem occurs only in one application or document, compare with another print.
Nozzle pattern has repeatable gaps
For inkjet printers, repeatable gaps can indicate nozzle/output problems. Follow the printer manufacturer's nozzle-check and cleaning procedure.
Alignment pattern is doubled or shifted
Check alignment using the printer's supported alignment procedure and compare with the browser alignment test.
Color channel is uneven
Run the CMYK/color test and compare the affected channel.
Lines remain after tests look normal
Check paper, print mode, driver settings, and model-specific maintenance guidance. Do not claim a hardware diagnosis.
Before you clean the printer
Don't start repeated cleaning cycles just because you see lines. First identify the pattern and run the appropriate test. Printer maintenance procedures vary by model, and repeated cleaning can consume ink.
For inkjet users: use the printer's built-in nozzle check when available.
Reference
Quick diagnostic table
| Symptom | First test | What to inspect |
|---|---|---|
| White horizontal gaps | Printer Nozzle Test | Missing segments / affected color |
| Doubled or shifted lines | Printer Alignment Test | Registration / alignment |
| Colored lines | CMYK Printer Test | Individual color channel |
| Banding in gradients | Print Quality Test / Grayscale Printer Test | Tonal transitions |
| Repeated dark marks | Print Quality Test | Regular spacing / page position |
| Problem only in copies | Standalone Print Test | Scanner vs printer |
Important:
PrinterInspect can help you inspect visible print symptoms, but a browser-generated test page cannot read your printer, ink or toner levels, identify a failed component, or replace the manufacturer's model-specific diagnostic tools.
Visual troubleshooting only. It cannot identify a specific failed component.
FAQ
Lines on prints: questions
Why is my printer printing horizontal lines?
Horizontal banding is often related to printhead passes or ink delivery on inkjets. Identify whether the lines are white gaps or dark bands, then run the matching test.
Why does my printer print white lines?
White lines or gaps indicate areas where printed coverage is missing or reduced. On inkjet printers, a nozzle test can help determine whether specific ink channels are affected.
Why does my printer print dark lines?
Dark lines are added marks rather than missing ink. They are worth checking with a print quality test and the manufacturer's maintenance guidance.
Why is my printer printing lines in one color?
A single-color issue points to that channel. Run the CMYK test and compare the affected color.
Can clogged nozzles cause lines?
Yes, clogged or blocked nozzles are one possible cause of lines and gaps, but settings, paper, and alignment can also contribute. Confirm with a nozzle check.
Why does my printer print lines on photos?
Photos and gradients expose banding that solid areas hide. Check tonal transitions with a print quality or grayscale test.
Why does my printer print lines when copying but not printing?
Clean prints with lined copies point to the scanner glass or document feeder. Print a standalone browser test to separate the two.
How do I test whether printer lines are caused by alignment?
Print the alignment test and check for doubled, shifted, or skewed lines and registration marks.
Should I clean my printer if it prints lines?
Not immediately. First identify the pattern and run the matching test. Repeated cleaning consumes ink and may not help alignment or settings issues.
Can this page tell me which printer part is broken?
No. It narrows the visible pattern to the right test. Only the manufacturer's diagnostics can identify a failed component.