There can be an error or a simple setting problem that is causing your printer to display it’s offline. Until you resolve this, it cannot print. Here are some solutions for . The Brother printer should not be in the sleep mode or having any paper jams error. The ink levels should be correct. The connection between the printer and computer should be stable. Either through the USB cable or a wireless connection. The printer should be set as the default device on your computer. You can change the status under devices and printers.