I have a HP Officejet Pro 8000 Printer - A809a that I installed brand new cartridges in and it only prints blank pages. Whether I try to print from my computer or a test page directly from the printer, everything is blank. I've done the printer head cleaning a few times already and still no luck. I also followed HP's video on soaking them in water and patting them dry, but still nothing. I just spent $140 on these cartridges and could really use some help. Thank you.