I have tried with a PhotoSmart C4480, and my dad's C4280. When I try to print something, a blank page comes out. I have installed the correct drivers from the HP website. I am using Mac OS X 10.5.5. and a white MacBook.
1. I downloaded both drivers and tried them one by one.
2. I don't think so, I just installed the disk images and then it said my printer was ready to use.
3. I don't see firmware on the HP website, just drivers.
4. I am connecting via USB.