Horizontal rainbow lines on color prints

[zerokp]

I wanted to post this here incase someone runs into a similar issue. The M477 would print black and white perfect, but when printing anything in color it would add an array of horizontal rainbow colored lines. It would do this printing reports/demo pages directly from the printer, so I knew it wasn't driver related. I updated the frimware which didn't resolve the issue.

Solution: Faulty Cyan toner cartridge. I replaced all the toner cartridges individually to determine which one was malfunctioning. 

[joshuagay]

Thank You! 

Found this with Google before going downstairs to look at user issue.

Of course it was the Yellow Cart, and we tried it last.... was taking forever for the unit to initialize until we pulled that cart, problem followed cart to other unit, bagged and tagged.