I have a Hp office Pro 8500A Plus printer, bought it in march 2011. Evrery time I turn on the printer a Carriage Jam warning comes up, I had tried to claer the jam, in various points that printer sugested but there is no paper jam to be found. I touched the Okay button to continue but, printer iddle for hours(Checking printer.this process might take several minutes). Priner never comes back to normal display menu. Can you Please help me to find a solution to this problem. It will be greatly Appreciated. Thanks. Ricardo Marmol.