panasonic cq vd7700u

So my buddy got al & ed's to remove his in dash DVD player and gave me a deal on it because he is selling his car and moving. I put it in my silverado and im sure i installed it correctly (never had problems with any head unit i've installed), then when i went to turn the key and power it up, and all it dose is the power button blinks on and off every 10 seconds. It even powers my amp up, then off, then on every 10 seconds...Anybody have any ideas for me, i called panasonic and they said they have no idea and to take it to an "authorized dealer". I called him and he was no help, just bring in the unit and they will service it..Theres gotta be something simple im missing, it was just working in a 01 mustang, now its in my silverado, the only button that blinks is the power LED and eject LED...Anybody ever have this problem with there in dash DVD player... ?95 silverado / 95 impala

Power LED and open screen LED are the only buttons blinking...Not the eject...95 silverado / 95 impala