I have a HP Deskjet D1660 (USB connection to an XP Pro computer). The HP Printer has both Color and Black Cartridges, but I only need to print in black ink. When I try to print something the first letter on each line doesn't print properly (it is faded).. I adjusted the properties of the printer for black ink only, reset the margins and replaced the cartridge. But I still get the same result? Any ideas?