Thanks for your reply. But I did try to install ColorLaserJet 2700 Classic Driver. The result was the same. The machine printed 3 copies of test sheet.  The port I am using is a USB001 port. Is that a problem? Using my cell phone via the Wifi to print is ok.  But using either Wifi or cable via USB001 port from the computer is always printing 3 copies.    Best regards Ted. 

I copied the IP address to a browser, but when I hit enter, the browser direct this IP to a search engine. I cannot see any printer number of copy information.  Also, when I use my mobile device to print, for example, my iPhone, it prints only 1 copy. The 3 copies problem only occurs when I linked with PC. I tried from 2 different PCs, and I faced the same problem.    Ted