English Reader

A piece of yellow paper

I had been doing Tech Support for Hewlett-Packard's DeskJet division for about a month when I had a customer call with a problem I just couldn't solve. She could not print yellow. All the other colors would print fine, which truly baffled(迷惑) me because the only true colors are cyan(蓝绿色), magenta(洋红), and yellow.
 
I had the customer change ink cartridges, delete and reinstall the drivers. Nothing worked. I asked my coworkers for help; they offered no new ideas.
 
After over two hours of troubleshooting, I was about to tell the customer to send the printer in to us for repair when she asked quietly, "Should I try printing on a piece of white paper instead of yellow paper?"