Hey There, I am Anna Carter. If your My HP printer is offline, it may be caused due to the printer being in an off state or sleep mode. Other problems can be network issues, cartridge ink problems, or loose USB cable connection. When the printer shows a blank screen, the printer may be switched off or in sleep mode. In such cases, the issue can be resolved. To fix the problem, remove the power cord from the socket and insert it again. This would solve the issue. If the problem is not solved, then you have to troubleshoot for other causes. This includes loose USB connection or network issues.