HP color laserjet not printing correctly

We have an HP color laserjet 3500. Just recently, it started printing funny. There will be horizontal faint lines across the page. Not additional lines printed, but faint lines where there is no color, if that makes sense. Also, it will sporadically stop printing black. If we print out 20 pages, some will be fine, some will have the rest of the colors but no black. We have tried replacing all toners. Would this be a fuser issue? I would hate to spend 300 bucks and have it be something else.
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If you have replaced all of the fusers and there are still area's without color then it could very well be the fuser.  I'm not too familair with this model printer but if you can see the fuser try and look at (but dont touch) the bright green fuser wheel (it may be a different color) to see if it is smooth or may have some "pits" or grooves worn into it where it is not picking up ink properly.  The fuser should be perfectly smooth
You may also want to consider contactly HP Technical Support many times they will help with issues like this even if out of warranty.

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I agree with AIC, if you have tried swapping the cartridges, either new, or with a set from another known  working printer of the same model, then more than likely the fuser is bad. Are the cartridges you are using
HP genuine or aftermarket? Remanufactured or brand new?

Another way to tell where the problem is occurring is to measure the distance between the lines you are seeing, if they are very close to, or just short of three inches, your fuser is probably scratched or deformed. If it measures something other than that, post what it is and I'll have a look.

There is also a chance it could be the Laser/Scanner, but not as common of a failure.

Good luck
ilguybobAuthor Commented:
The lines are not always there, just sometimes. It almost looks like sometimes it leaves out streaks of black, which creats the lines. There are usually 5 lines, from about a half inch to a quarter inch apart.
At this point I would have to say either fuser, transfer unit, or the black scanner. Have you looked at the fuser to see if it is scratched or marred at all?
ilguybobAuthor Commented:
No, I have not. I think we are just going to replace the printer since parts would be the same cost.
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