Started printing yellow on all pages. Had them switch to B&W. Even with B&W there were yellow streaks being left. They tested using a brand new Yellow cartridge but the issue was the still happening.
Open front & as expected yellow toner all over the place. Removed the imaging unit & cleaned up the inside of the printer using air & soft tissue doing my best to remove the excess toner left and any debris from inside the printer.
Put it everything back and ran through the Maintenance Mode options. Tried printing an Information Page but then I began getting paper jams, roller would grab the paper but was not feeding it through the fuser/imaging unit or transfer belt. Removed everything again, found excessive yellow toner again on the inside and on the transfer belt. Cleaned it up and got it printing but yellow was still printing on the edges of the pages and now the magenta is not lining up and colors are faded and do not seem to be combining.
Ran maintenance mode again and now the printer is jamming, again, but not even grabbing the paper like before. Just gives me a jam error after trying for a second.
Should I replace the imaging unit, the fuser and or the transfer belt? I think the roller is fine, I think that the excess yellow toner is blocking or disrupting the sensors inside.
Early thanks for any suggestions and feedback.