Printer printing blurry lines

[OneCity]

I am getting little gray blocks around some of my lines. my calibration page looks good, I would think the words are faded but the black boxes at the bottom looks complete and the cartridge says good. 

[Qsaifoddin]

Hi @OneCity 

If you're noticing little gray blocks around some of your printed lines on your HP Color LaserJet Pro MFP M479fdw, despite a good calibration page and satisfactory cartridge status, here are some steps you can take to address the issue:

Step 1: Check the Print Settings

1. Verify Print Quality Settings:
   • In your print dialog, make sure that the print quality is set to a high or "Best" setting to ensure optimal output quality.
   • Confirm that the paper type setting matches the paper you are using.

Step 2: Inspect the Imaging Drum and Toner Cartridges

1. Remove and Reinstall Cartridges:

   • Carefully remove each toner cartridge from the printer.
   • Inspect the cartridges for any damage or spilled toner.
   • Shake them gently side to side to redistribute the toner, then reinstall them.

2. Inspect the Imaging Drum:

   • Check the imaging drum for any scratches or damage. If it is coated with toner, gently clean it with a lint-free cloth.

Step 3: Perform a Printer Cleaning

1. Run Cleaning Cycle:

   • Access the printer's menu via the control panel and look for the maintenance or cleaning option to run a cleaning cycle, which might help eliminate unwanted marks.

2. Check the Transfer Roller:

   • If accessible, ensure the transfer roller is free from debris and toner dust that could cause gray artifacts.

Step 4: Update Printer Firmware

1. Check for Updates:
   • Go to the HP website and ensure your printer's firmware is up to date. Newer firmware can address print quality issues.

Step 5: Adjusting Graphic Settings

1. Experiment with Color Settings:
   • In the printer properties, try adjusting the graphic settings. You may switch to grayscale mode just to observe any changes in the artifact pattern.

Step 6: Conduct a Full Printer Calibration

1. Re-run Calibration:
   • Through the printer's settings menu, select calibration and run a full printer calibration. This helps align all colors and may impact the appearance of gray blocks.