System cannot power on?

12th Dec 2018 System cannot power on?

1. Please remove all external plug-in devices.
2. Plug-in the power adapter and turn on system to check for power LED status.
3. If power LED does not light up and the system fan does not working, you will have to change a new power adapter for examination.
4. If adaptor is functioning and power LED of your POS terminal do light up but cannot hear any system status beep from the buzzer, and the screen did not show any P.O.S.T or system information, it means the main board may be not functioning anymore. Please turn off the power and send to the service center for further examinations.