Hello mgw1010101,
Please take a look at this article for banding with some trouble shooting steps for you to try and resolve the issue. If you are still having issues after trying these steps, I suggest that you call into our support department for assistance @ 1-800-821-2797.
Can anyone please help diagnose what is going on with my 7855?
These cyan bands just showed up one day. I've swapped the drums and cleaned the printhead but they still persist. The developer has about 95% life on it and the machine has only 26K prints. I am at loss or don't want to admit I may need to change the developer. Any help is greatly appreciated. Thanks!