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‎01-27-2020 01:16 PM

HP Recommended
Operating System: Microsoft Windows 10 (64-bit)

I have a LaserJet MFP 477fnw that all over sudden produces red dots on the left hand side of the paper about 1 inch apart.

I have updated the drivers, firmware and anything else I could think of. I also have played with different paper types and I have cleaned the printer.

There is no difference if I print in color or B&W, the dots are there. However, if I print a blank page, there are no dots, if I print a printer report, there are no dots.

I have tried different software to print, I have used pdfs.

The only thing I found is that if I print an excel file in all black - no dots. As soon as I add color to one of the cells, the dots are there. 

Any idea what might cause this?

1 ACCEPTED SOLUTION

Accepted Solutions

‎01-27-2020 01:33 PM

HP Recommended

Based on the spacing likely you have either a bad magenta cartridge or something stuck to the drum of the magenta cartridge or the mag roller in the cartridge.  Pull the toner out and look at the blue/green drum to see if you can find contamination. Do not touch the drum with bare skin as the oils can lead to more problems. If you find something stuck you can try to gently remove using a lint free cloth. Do not scrub aggressively as you can scratch the drum.

If you find the information provided useful or solves your problems, help other users find the solution easier by marking my post as an accepted solution. Clicking "yes" on "was this reply helpful" also increases the chances that this solution will help others.
I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.



View solution in original post

2 REPLIES 2

‎01-27-2020 01:33 PM

HP Recommended

Based on the spacing likely you have either a bad magenta cartridge or something stuck to the drum of the magenta cartridge or the mag roller in the cartridge.  Pull the toner out and look at the blue/green drum to see if you can find contamination. Do not touch the drum with bare skin as the oils can lead to more problems. If you find something stuck you can try to gently remove using a lint free cloth. Do not scrub aggressively as you can scratch the drum.

If you find the information provided useful or solves your problems, help other users find the solution easier by marking my post as an accepted solution. Clicking "yes" on "was this reply helpful" also increases the chances that this solution will help others.
I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.



‎01-27-2020 01:44 PM

HP Recommended

That did the trick! THANKS!!!

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