Hi all I have a Hp printer 8550n suddenly give me an error 50.4 fuser error cycle power, I search in hp page and give me some reason for the error, http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=bpl12591&locale=en_US#N100B4 I re- check all the posible causes and all is find...