You may come across an error message and you notice HP printer offline Windows 10. You may have to use troubleshooting techniques to identify the offline issue. However, this can be caused due to simple issues. The common problem is that your HP Printer must be switched off or in sleep mode. In such a situation, turn off the HP printer. Remove the plug and wait for a minute. Insert the printer plug into the socket. Your printer will start working. If it doesn’t then you may have to check for other conditions.