To fix why is my printer offline, you are supposed to follow and apply few important instructions. You should turn off the printer and then you can unplug the power cord from the printer itself. Now, you can simply turn off the computer and then wait for 30 seconds and then turn on the computer. Now, you must plug the printer power cord into the printer and then turn the printer on and then you should check the functionality of the printer. You can simply find out the ways to fix it. Now, if you are unable to fix it manually, then you should take help from the experts.