It gives some reasons for the error 51 on the 4l.
It looks like something isn't seated properly. I would think the fuser kit, being as you have just changed it.
Hope this helps.
I have checked the seating and compared it to another 4L I have. Everything looks to be the same. I found another article online that says the laser isn't getting warm enough. I am wondering if there is a setting to change the warm up time or way to check that.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.