Try to troubleshoot the cause of the hp Office jet pro 8710 offline issue: 1. Check if you have turned on your printer. 2. Check if your printer is listed as "offline." 3. It may be possible that your printer is not listed as the default printer. In that check, go to the settings on the computer and modify it. 4. Check your USB connection and network error. Ensure the USB cable is not distorted and the internet connection is active.