There are several reasons why is my Brothers printer offline, including a connection issue, power outage, or a problem with the printer's software. To resolve the issue, check the printer's connection to the computer and make sure it is properly plugged in. Try restarting the printer and the computer, and ensure the printer is selected as the default printer. If the problem persists, check the printer's manual or user guide for further troubleshooting steps or contact Brother support for assistance.why is my brothers printer offline