My name is ***** ***** certified professional with over 10 years experience. I will be glad to assist you with this.
I am sorry to hear that you are having this issue.
Yes the main power switch is on the bottom left front of the tv.
yes, the tv button behind the door on the right side panel turns it on when in Standyby mode.
okay, try pressing the up down arrows in the side panel.
did that work for you?