There are a variety of reasons you would see printer offline. You need to troubleshoot for various possible conditions to understand the root cause of it. There is a high chance that you must have not plugged in the power line properly into the power source. To fix the problem, switch off the printer machine. Remove the wire of the power source. Wait for one minute. Put the wire back into the socket. Wait for the printer to warm up and function properly. This might take a few minutes but be patient. Once the printer starts, the printout can be taken out.