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The most common cause of the printer saying its offline is it is not set as the default printer on your computer. If you’re still wondering, what does it mean when printer is offline. It may be because of low ink or other technical glitch. You can easily change the status of printer offline to online. Under the devices section in your computer check, if it is listed as devices. You must re install the driver from the website. In order to use the Printer offline. Right click on the icon of Brother Printer machine. Then, see what’s printing and change it to online.