u/DER3Z

I recently bought a panasonic bt-s901yn and i'm having a little trouble with it. I bought it off ebay and the seller said that it was working before they shipped it. I opened the box today with everything intact, the seller packaged it really well. So I plugged the unit in and turned it on but I get no power indicator light. It does sound like it's on but no picture. I open up the unit and I see no burn marks on the motherboard or fuses blown.

What am I doing wrong?

Do I need to hook up a video source for the power indicator light to come on?