If I had to guess, I’d say the printer (whatever method it uses) at the factory was just out of red ink for a little while. I’m a bit surprised they went to the trouble to have two-color printing in the first place.
"Well, at home, whenever something goes wrong with the dishwasher, I just jiggle the blue wire.
But in The Abyss, wasn’t it yellow or white? And Ed Harris had a yellow light so he couldn’t tell.
Looks like I picked the wrong week to stop sniffing toilet cakes.
As a WAG, perhaps there are red lines on the back side of the two units that you can’t see while they’re still in the package.
Step 4 is the most important. You should always wash your hands after touching your unit. Or anyone’s unit, really.