Tried trashing prefs. Tried trashing all prefs. Disabled some unnecessary extensions, too. Zapped PRAM. Changed cables. Nothin' doin'. I did find a 'Reset Serial Channel' app, but I have to transfer it over to a zip disk or floppy so I can get it on the Performa. After that, I'm at a loss of what to do. Thanks for all your help, fellas. Let me know if you have any other brainstorms.