Several factors, including ink toner obstruction, might cause a Brother printer offline to continually lose connectivity. Not set as the default printer. We give you a few instructions on how to do it online. Ensure that the Brother printer's default setting is selected. By "Unchecking" the offline state, you can fix the Brother printer's offline issue in Windows. If a print job is pending, clear the print spooler and restart it. If a printer jam error is present, update the printer driver.