...and it is correctly connected to your computer by the USB cable.

Hello Alan, Mister Micawber, Beeesneees, Mordant, Esl_Expert and other native English speakers,


tinyurl.com/25qh3to
Please make sure that your Brother machine is ON and [color=green]it is correctly connected to your computer [color=blue]by the USB cable.

Can [color=green]it is be left out?
Is [color=blue]by fine? What about “with” or “using”?

Yes, you could omit ‘it is’; in fact, it would be better so. ‘By/with/using’ are all OK.

Thank you, MM.