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09-02-2019 08:18 AM
Pages are now coming out solid black.
Haven't tried printing anything containing color, because toner is going fast with this problem!
Web searches all say it's fuser unit, but I need detailed information so I can order the correct parts. Since I do lots of technical repairs, I plan to install myself, if possible.
Thanks in advance,
09-02-2019 08:21 AM
Post a sample please. A solid black page is most often caused by a bad drum contact or bad high voltage board. The fuser simply bonds whatever toner the printer has put on the page.
I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.
09-02-2019 09:42 AM
Thanks for the speedy reply.
I'm not sure what kind of sample you are referring to. A page that is solid black is not something I can post, but I could post a photo of such a page. Would that help?
It does sound like the high voltage board, but it would be great if there is some way to check for a "bad drum contact". The printer gets only very light use, so perhaps it is just a bad connection to the drum. Maybe re-seating the cartridge is worth a try. I'll try that, and if it fails, it will generate a nice dense black page for me to photograph and post.
09-02-2019 10:01 AM
I see that the toner contacts are on the front, so I made sure the contacts are all clean, reseated the black cartridge, and printed a page of black text. It's still 100% coverage solid black, edge to edge (with about 1/8" top, left, and right, and full bleed at the bottom (at least I think it's the bottom edge)).
The grey areas are just sheen from the overhead lighting. The entire page is pretty dense black.
Thanks for helping with this trouble-shooting. Any further tests or suggestions would be much appreciated.