Use the below Brother Printer Offline Fix to bring your printer back online.
1. Go to the Start menu and select Control Panel.
2. Select the Printers and Faxes option and double click on your printer icon. Doing this will open a pop-up window that contains information about the scheduled print jobs.
3. Select the Printer option from the menu and uncheck the Use Printer Offline mode if enabled.
After following the above steps, try printing a test page from your Brother printer to see if the issue is resolved or not. Although Brother printer offline issues can easily be fixed by any user, if you continue to face the issue, you can also get help from Brother Printer Support experts.