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- HP Community
- Printers
- Printing Errors or Lights & Stuck Print Jobs
- Light Printing and vertical lines while printing

Create an account on the HP Community to personalize your profile and ask a question
08-25-2024 02:53 AM
Accepted Solutions
08-27-2024 11:01 AM
Hi @AJ3932,
Welcome to HP Support Community.
Thank you for posting your query, I will be glad to help you.
If your HP LaserJet 700 Color MFP M775 is printing with light output and vertical lines after changing the transfer unit, there are a few steps you can take to troubleshoot and resolve the issue.
Check the New Transfer Unit:
- Ensure that the transfer unit was installed correctly. Sometimes, improper installation can cause printing issues.
Inspect the Toner Cartridges:
- Check the toner cartridges for any issues. Make sure they are properly seated and that there is no toner leakage or damage.
- If any of the toner cartridges are near the end of their life, replace them with new ones.
Clean the Printer Components:
- Clean the interior components of the printer, including the transfer rollers, corona wires, and the imaging drum. Dust or toner buildup can affect print quality.
- Refer to your printer's manual for specific cleaning instructions.
Check for Firmware Updates:
- Ensure that your printer's firmware is up-to-date. Outdated firmware can sometimes cause unexpected printing issues.
Run Printer Diagnostics:
- Use the printer's built-in diagnostic tools to check for any errors or issues. This can help identify if there’s a problem with the hardware or settings.
Perform a Test Print:
- Print a test page or a diagnostic page to see if the issue persists. This can help determine if the problem is consistent across all types of documents.
Adjust Print Settings:
- Ensure that the print settings are correctly configured. Sometimes, print quality settings in the printer’s software can affect the output.
I hope this helps.
Take care and have a good day.
Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!
Alden4
HP Support
HP Support Community Moderator
08-27-2024 11:01 AM
Hi @AJ3932,
Welcome to HP Support Community.
Thank you for posting your query, I will be glad to help you.
If your HP LaserJet 700 Color MFP M775 is printing with light output and vertical lines after changing the transfer unit, there are a few steps you can take to troubleshoot and resolve the issue.
Check the New Transfer Unit:
- Ensure that the transfer unit was installed correctly. Sometimes, improper installation can cause printing issues.
Inspect the Toner Cartridges:
- Check the toner cartridges for any issues. Make sure they are properly seated and that there is no toner leakage or damage.
- If any of the toner cartridges are near the end of their life, replace them with new ones.
Clean the Printer Components:
- Clean the interior components of the printer, including the transfer rollers, corona wires, and the imaging drum. Dust or toner buildup can affect print quality.
- Refer to your printer's manual for specific cleaning instructions.
Check for Firmware Updates:
- Ensure that your printer's firmware is up-to-date. Outdated firmware can sometimes cause unexpected printing issues.
Run Printer Diagnostics:
- Use the printer's built-in diagnostic tools to check for any errors or issues. This can help identify if there’s a problem with the hardware or settings.
Perform a Test Print:
- Print a test page or a diagnostic page to see if the issue persists. This can help determine if the problem is consistent across all types of documents.
Adjust Print Settings:
- Ensure that the print settings are correctly configured. Sometimes, print quality settings in the printer’s software can affect the output.
I hope this helps.
Take care and have a good day.
Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!
Alden4
HP Support
HP Support Community Moderator