when printing documents, a light blue line is printed along the left edge of the paper

[DirtyLUV]

when printing documents, a light blue line is printed along the left edge of the paper

[VikramTheGreat]

Hi @DirtyLUV,

Welcome to the HP Support Community.
 

Thank you for posting your query. I will be glad to help you.

I understand how annoying it is when your HP printer consistently prints a light blue line along the left edge of the paper, especially when everything else seems fine. This issue is typically related to print quality problems.
 

Fix: Light Blue Line on Left Edge of Printed Pages

1. Clean the Print Path and Printheads

Dust, toner residue, or ink buildup inside the printer can cause unwanted lines.

• Use the printer’s built-in cleaning tool:
  • Go to Setup > Printer Maintenance > Cleaning Page.
  • Load plain paper and follow the prompts.
• If your printer supports it, run a Printhead Cleaning cycle from the control panel or HP Smart app. 

2. Check for Toner or Ink Smearing

If you're using a LaserJet, inspect the imaging drum and toner cartridge:

• Remove the toner cartridge and check for damage or smudges on the drum.
• Do not touch the drum surface; fingerprints can cause print defects.
• Replace the cartridge if the drum is scratched or worn.

👉 HP Color LaserJet Pro - Resolving color print quality problems | HP® Support

3. Use Genuine HP Supplies

Non-HP or refilled cartridges can cause color misalignment or streaks.

• Verify cartridge authenticity via HP Anti-Counterfeit.
• Replace with genuine HP cartridges if needed.

4. Check Paper Type and Quality

Low-quality or incompatible paper can cause toner or ink to misbehave.

• Use HP-recommended paper for your printer type (inkjet or laser).
• Avoid glossy or overly absorbent paper unless specified.

I hope this helps.

Take care and have an amazing day!
 

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Regards,

VikramTheGreat