ECP Mode Must be ON! (Extended Capabilities Port). If you plan to connect your HP OfficeJet or HP Printer/Scanner/Copier to your PC via the PC's parallel port, your computer's parallel port must be set to ECP mode to operate properly under Windows 2000. ECP mode allows greater I/O (communications) capabilities through your parallel port and is enabled via the computer's BIOS. Restart your PC, and in most cases, you will be prompted to hit F1, F2, or DEL to Enter your computer's BIOS or "Setup" program. (Check your PC's documentation or vendor's web site for more info).