Yes, I know it's ancient. But my Color Laserjet 2500 was working fine the last time I used it. Now if I try to print anything that uses any color at all, it can only produce yellow. Everything else vanishes. Black only mode works, but no black appears in color mode. Only the yellow. It thinks it has toner, and so doesn't give any error messages. Inspection of the cartridges inside the printer shows them looking pretty normal. What could cause this? Some sort of alignment problem inside the printer maybe?
I'm printing from a Windows 7 system, so the driver is going to be whatever the latest is in Windows 7. Thing is, it was working just fine with this same system and I doubt the driver has been updated in years.