Canon Pixma Pro9000 - Switched Colors; Red prints as Yellow and vice versa

[minami]

So out of nowhere my printer started printing red as yellow and yellow as red. So, instead of printing yellow where it should, it is printed red. No idea how this happened and I've spent the last couple hours googling to no avail. Does anyone know how/why this happened and how I can fix it?

 

[DefiantSon]

Turn the printer on and off again to see if it resets. Make sure that you haven't accidentally changed any settings in either the printer itself or in the print dialog box. You might have to reinstall fresh drivers, your current drivers might be corrupted. Contact canon for some technical support. Try those out.