I have an HP 8550N that is experiencing faded black printout on every 10th page or so. I have replaced the black toner, and printed a config page. It shows that I have 174000 prints on the machine and that the transfer kit and the fuser kit are at 99% of life remaining. I am not sure what to replace as I am new to this particular printer and I have no real maintainance history. If there is anyone out there who has seen this issue, please tell me what you did to fix it or what part I need to order. Thanks