Hey, this is Sheldon, a Samsung customer executive. Well, there's no single reason for Samsung m2020 offline problem. It can do due to multiple reasons. To get your Samsung m2020 printer back online, you must turn off your printer and also turn it on again after 30 seconds. Make sure that the USB string is completely fitted , not rasped, and fully fine to deliver optimum performance. Next, you must visit the Samsung website, enter your printer model and install the rearmost motorists to fix bugs and other issues. Your issue of Samsung m2020 offline will be resolved.