What this means
Lines, streaks, or bands on your page mean the hardware is dirty or damaged. The issue lives inside the machine, not in your computer or document files.
Clogged nozzles cause missing lines on inkjet prints. A scratched drum creates repeating lines on laser prints. Paper dust on the feed rollers streaks pages, and low ink or toner causes faint ones. Damaged transfer rollers leave smudges. Fuser film damage leads to vertical smears. Foreign objects in the paper path scratch cartridges, and incompatible paper weights ruin toner adherence.
Run a nozzle check pattern to diagnose a dirty print head. Beyond that, you need to clean or replace the failing part.
Common causes
- Clogged print head nozzles in inkjet printers
- Damaged or worn drum unit in laser printers
- Toner leak inside the printer
- Dirty paper feed rollers
- Debris or toner buildup on the transfer roller
- Using damp or low quality paper
- Failing or defective ink/toner cartridge
What to check first
- 1Check if the issue happens on multiple documents or just one file
- 2Verify ink or toner levels
Step-by-step fix
- 1
Run a print head cleaning utility
Use the printer software or control panel to run a nozzle check and cleaning cycle.
Do not run more than three cleaning cycles in a row to avoid wasting ink.
- 2
Inspect and reseat cartridges
Remove the ink or toner cartridges and check for leaks or damage. Reinsert them firmly.
Be careful not to touch the green or blue drum surface on toner cartridges.
- 3
Clean the paper rollers
Wipe the rubber feed rollers with a slightly damp lint-free cloth to remove paper dust.
- 4
Print a diagnostic page
Print a nozzle check or CMYK grid pattern to identify exactly which color channel is causing the streaks.
- 5
Replace the faulty cartridge
If cleaning cycles and reseating do not resolve the streaks, replace the specific cartridge that corresponds to the colored line on the page.
When to contact a professional
If multiple cleaning cycles and new cartridges fail to fix the lines, call a professional. Call someone too if you spot internal damage to the laser scanner, the fuser, or the permanent print head assembly. Stop right there. Pushing past this point risks severe ink stains on your hands and clothes, or worse, burning yourself on a hot fuser. Check your warranty before attempting major internal repairs so you do not void your coverage.