You probably already know this part and didn't want to get into details over the printer, but here it is anyway:
If you're printing a color item and only the black parts on the page show up in the printout, that sounds like a dried up color cartridge. If you're printing a color item and it print in grayscale, it could be that the printer setup says black/gray instead of color.
Apparently the printer hasn't been used much (it hadn't even been installed), and I'm pretty sure the ink cartridges are both nearly full. But what I was getting was, as you described, just the black parts, with grey where a darker colour should be but white where light colours or primary colours would go, and it looks like the printer has been sitting a long time (with the ink cartridges installed). So I was thinking that the colour cartridge may be dried up as opposed to used up, but I wasn't sure whether they did that (I wasn't sure whether the ink was a liquid or a powder).
Assuming you meant what you typed when you wrote "dried up", there's my Clue. So when I hand the equipment back, I'll tell them to pick up a new ink cartridge and see if it suddenly starts printing in colour again.
(no subject)
If you're printing a color item and only the black parts on the page show up in the printout, that sounds like a dried up color cartridge.
If you're printing a color item and it print in grayscale, it could be that the printer setup says black/gray instead of color.
(no subject)
Assuming you meant what you typed when you wrote "dried up", there's my Clue. So when I hand the equipment back, I'll tell them to pick up a new ink cartridge and see if it suddenly starts printing in colour again.