Most of the issues you face are because of some settings change that your device needs. It is completely understandable since you don’t require to use all the features at once. Usually, the printer is offline because it is not selected as the default printer. Here are the steps to resolve Brother MFC 9340CDW offline. Under the devices section in your computer check, if it is listed as devices. You must re install the driver from the website. In case, you need to use the Brother Printer offline. Right click on the icon of Brother Printer machine. Then, see what’s printing and change it to online.