Red blotches on left side of M452dn pages

[jonhill]

Every page has blotches of red along the left edge. It looks like multiple cartridges have toner along that edge, especially the red one. And I found toner inside the printer in places I assume it should not be. What do I need to do?Sample printMagenta cartridge

[A_Gayathri]

Hi @jonhill,

Welcome to the HP Support Community

I understand you are facing a print quality issue with your HP Color LaserJet Pro M452dn. Not to worry I will help you to get a resolution to resolve the issue.

To assist better:

• Are you using genuine HP ink cartridges?
• Does the copy print out the same way? 
• What's the application you are trying to print from? 
• Have you tried printing from a different application or device? 
• do you still see the marks when you print a  blank paper 
• Please help to verify if there are any dent marks on the transfer belt

While you respond to that, let's print a Print Quality Diagnostic page -Post the Print Quality Diagnostic page here so we can help you further. 

Let's perform a power drain: 

• With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.
• Remove the USB cable, if present.
• Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.
• Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord (This is important) and then plug back the power cord to the printer.
• Turn on the printer and wait till the warm-up period finishes and the printer is idle

Update the printer firmware 

• Click here to download and install the latest printer firmware from your product
• Click here to know different methods of updating the printer firmware.

You may also refer to this document with steps to fix the " Print Quality Issues" issue applicable to your printer -  Print Quality Issues

click here and follow the troubleshooting steps- HP LaserJet Pro Printers - Cleaning the Printer

Hope this helps! Keep me posted. 

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!

[jonhill]

After reviewing other posts here, I replaced the magenta toner cartridge with a new one. (Both were genuine HP cartridges.) This eliminated the problematic blotches that you can see by looking at the images that I attached to my previous message. Nonetheless, I updated the firmware as you suggested and printed a Print Quality Diagnostic page. I have attached a photo of that page. I see minor banding, but no blotches with the new cartridge.

[jonhill]

So does that Print Quality Diagnostic page I sent look like an optimal result? If so, then my remaining question would be about the defective cartridge that I replaced. It was a large capacity cartridge that still had 60% of its capacity remaining. Can I be reimbursed for the amount remaining that I will be unable to use?

[A_Gayathri]

@jonhill,

Thank you for your response, I really appreciate your efforts. As the issue still persists, I'm sending out a private message to assist you with the next course of action. 

Please check your Private message icon on the upper right corner of your HP Community profile Next, to your profile Name, you should see a little blue envelope, please click on it or simply click on this link.

Hope this helps! Keep me posted for further assistance.

Please click “Accept as 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!