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- HP LaserJet Color Pro MFP M477fdw printing spot marks on the...

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1 REPLY 1
02-22-2020 06:37 PM - edited 02-22-2020 06:42 PM
Repetitive marks down the side that are equally spaced are typically caused by either a bad cartridge 63mm or a failed fuser film 57mm. See this post
https://h30434.www3.hp.com/t5/LaserJet-Printing/multiple-color-patches-on-printed-pages/td-p/7208654
A cartridge issue can sometimes just be something stuck to the drum of cartridge that matches the color of the defect and sometimes can be cleaned off by gently removing debris from drum with soft lint free cloth.
On this unit to actually see the fuser rollers requires removal of fuser from printer.
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