Make sure the router is turned on and connected to the Internet. If the light is off or blinking, turn off the printer, restart the router, and then turn the printer back on. Wait for the light on the printer to come on and stay on. Go to HP printer setup (wireless) for more information. You need to print an important document, and a notification will appear that the hp printer offline. Has this ever happened to you? What does this term mean? More importantly, how do you fix this problem?