C7350/7550 User’s Guide: Troubleshooting • 528Parallel Interface ProblemsParallel Transmisssion ModeThe parallel port supports IEEE-1284 and ECP mode. If yourcomputer's parallel port is not compatible with one of these modes,the printer may not print at all or it may print corrupted data.To correct for this, enter the printer's Parallel Menu and change theECP setting to Disable.control panel - language setup.eps1. Press MENU until PARALLEL MENU displays1. Press SELECT.2. Press ITEM (either + or -) until ECP displays.3. Press VALUE (either + or -) until DISABLE displays.4. Press SELECT.An asterisk (*) appears to the right of the selected setting.5. Press ONLINE. The printer goes online. ONLINE displays.OnlineMenu Item Value SelectReadyAttention OnlineMenu Item Value SelectReadyAttention Cancel